C Subroutine IRI90 C C Adapted 7/93 from 10/91 version of IRIS12 by Stan Solomon. C Replaces 3/92 adaptation of 12/90 version of IRIS12. C Replaced height range and interval with array of heights ZKM C Also supply number of heights NZ; unlimited number of heights allowed. C Added DIRECT argument to specify location of CCIR and URSI files. C Uses ASCII versions of CCIR and URSI files. C Subroutine DFP splices directory and filename together. C Accepts longitudes -180 to +180; maps internal longitudes 0-360. C Added SAVE statements for volatile memory machines. C Changed 'file not found' error to output message on unit 6 and stop. C Changed JF(12)=.true. to write messages on unit 12 instead of 6. C Note: JF(5)=.false. uses recommended (URSI) coefficients. C Note: JF(4)=.false. uses recommended Gulyeava B0 coefficients. C All other JF's usually should be .true. C C The following is the original comment from IRIS12: C C IRIS12.FOR ---------------------------------------- OCTOBER 1991 C C***************************************************************** C CHANGES FROM IRIS11.FOR TO IRIS12.FOR: C - CIRA-1986 INSTEAD OF CIRA-1972 FOR NEUTRAL TEMPERATURE C - 10/30/91 VNER FOR NIGHTTIME LAY-VERSION: ABS(..) C - 10/30/91 XNE(..) IN CASE OF LAY-VERSION C - 10/30/91 CHANGE SSIN=F/T TO IIQU=0,1,2 C - 10/30/91 Te > Ti > Tn ENFORCED IN FINAL PROFILE C - 10/30/91 SUB ALL NAMES WITH 6 OR MORE CHARACTERS C - 10/31/91 CORRECTED HF1 IN HST SEARCH: NE(HF1)>NME C------------- inlcuded on diskette ------------------------------ C - 11/14/91 C1=0 IF NO F1-REGION C - 11/14/91 CORRECTED HHMIN AND HZ FOR LIN. APP. C - 1/28/92 RZ12=0 included C - 1/29/92 NEQV instead of NE between URSIF2 and URSIFO C - 5/ 1/92 CCIR and URSI input as in IRID12 C C***************************************************************** C********* INTERNATIONAL REFERENCE IONOSPHERE (IRI). ************* C***************************************************************** C**************** OCTOBER 1991 **************************** C**************** SUBROUTINE **************************** C***************************************************************** C C C----------------------------------------------------------------- C INTERNATIONAL REFERENCE IONOSPHERE 1991 C C INPUT: JMAG=0/1 GEODETIC/GEOMAGNETIC LATITUDE AND LONGITUDE C ALATI,ALONG LATITUDE NORTH AND LONGITUDE EAST IN DEGREES C RZ12 (-COV) 12-MONTHS-RUNNING MEAN OF SOLAR SUNSPOT NUMBER C (OR EQUIVALENT F10.7 SOLAR RADIO FLUX AS C NEGATIVE NUMBER) C MMDD (-DDD) DATE (OR DAY OF YEAR AS A NEGATIVE NUMBER) C DHOUR LOCAL TIME (OR UNIVERSAL TIME + 25) IN DECIMAL C HOURS C HEIBEG, BEGIN, END, AND STEPWIDTH OF HEIGHT RANGE C HEIEND,HEISTP IN KM (MAXIMUM NUMBER OF STEPS IS 50 !!) C JF(1:12) TRUE/FALSE FLAGS FOR SEVERAL OPTIONS C JF(1)=.TRUE.[.FALSE.] ELECTRON DENSITY IS [NOT] CALCULATED C JF(2)=T[F] TEMPERATURES ARE [NOT] CALCULATED C JF(3)=T[F] ION COMPOSITION IS [NOT] CALCULATED C JF(4)=T[F] B0 FROM TABLE [FROM GULYEAVA 1987] C JF(5)=T[F] F2 PEAK FROM CCIR [FROM URSI] C JF(6)=T[F] ION COMP. STANDARD [DANILOV-YAICHNIKOV-1985] C JF(7)=T[F] STAND. IRI TOPSIDE [IRI-79] C JF(8)=T[F] NMF2 PEAK MODEL [INPUT VALUES] C JF(9)=T[F] HMF2 PEAK MODEL [INPUT VALUES] C JF(10)=T[F] TE MODEL [TE-NE MODEL WITH NE INPUT] C JF(11)=T[F] NE STANDARD [LAY-FUNCTIONS VERSION] C JF(12)=T[F] MESSAGE ARE WRITTEN TO UNIT=12 [=6] C C JF(1:11)=.TRUE. GENERATES THE STANDARD IRI-90 PARAMETERS. C IF YOU SET JF(8)=.FALSE., THAN YOU HAVE TO PROVIDE THE F2 PEAK C NMF2/M-3 OR FOF2/MHZ IN OARR(1). SIMILARLY, IF YOU SET JF(9)= C .FALSE., THAN YOU HAVE TO PROVIDE THE F2 PEAK HEIGHT HMF2/KM IN C OARR(2). IF YOU SET JF(10)=.FALSE., THAN YOU HAVE TO PROVIDE THE C ELECTRON DENSITY IN M-3 AT 300KM AND/OR 400KM AND/OR 600KM IN C OARR(3), OARR(4), AND OARR(5). IF YOU WANT TO USE THIS OPTION AT C ONLY ONE OF THE THREE ALTITUDES, THAN SET THE DENSITIES AT THE C OTHER TWO TO ZERO. C C OUTPUT: OUTF(1:10,1:50) IRI PROFILES C OUTF(1,*) ELECTRON DENSITY/M-3 C OUTF(2,*) NEUTRAL TEMPERATURE/K C OUTF(3,*) ION TEMPERATURE/K C OUTF(4,*) ELECTRON TEMPERATURE/K C OUTF(5,*) PERCENTAGE OF O+ IONS IN % C OUTF(6,*) PERCENTAGE OF H+ IONS IN % C OUTF(7,*) PERCENTAGE OF HE+ IONS IN % C OUTF(8,*) PERCENTAGE OF O2+ IONS IN % C OUTF(9,*) PERCENTAGE OF NO+ IONS IN % C AND, IF JF(6)=.FALSE.: C OUTF(10,*) PERCENTAGE OF CLUSTER IONS IN % C OUTF(11,*) PERCENTAGE OF N+ IONS IN % C C OARR(1:30) ADDITIONAL OUTPUT PARAMETERS C OARR(1) = NMF2/M-3 OARR(2) = HMF2/KM C OARR(3) = NMF1/M-3 OARR(4) = HMF1/KM C OARR(5) = NME/M-3 OARR(6) = HME/KM C OARR(7) = NMD/M-3 OARR(8) = HMD/KM C OARR(9) = HHALF/KM OARR(10) = B0/KM C OARR(11) =VALLEY-BASE/M-3 OARR(12) = VALLEY-TOP/KM C OARR(13) = TE-PEAK/K OARR(14) = TE-PEAK HEIGHT/KM C OARR(15) = TE-MOD(300KM) OARR(16) = TE-MOD(400KM)/K C OARR(17) = TE-MOD(600KM) OARR(18) = TE-MOD(1400KM)/K C OARR(19) = TE-MOD(3000KM) OARR(20) = TE(120KM)=TN=TI/K C OARR(21) = TI-MOD(430KM) OARR(22) = X/KM, WHERE TE=TI C OARR(23) = SOLAR ZENITH ANGLE/DEG C OARR(24) = SUN DECLINATION/DEG C OARR(25) = DIP C OARR(26) = DIP LATITUDE C OARR(27) = MODIFIED DIP LATITUDE C OARR(28:30) FREE C------------------------------------------------------------------- C*** THIS PROGRAM PRODUCES PROFILES OF *** C*** ELECTRON DENSITY *** C*** NEUTRAL TEMPERATURE (CIRA 86) *** C*** ELECTRON TEMPERATURE *** C*** ION TEMPERATURE *** C*** RELATIVE PERCENTAGE DENSITIES OF THE IONS *** C*** ATOMIC OXYGEN, HYDROGEN, HELIUM, *** C*** MOLECULAR OXYGEN AND NITROGEN OXYD (NO+) *** C***************************************************************** C*** THE ALTITUDE LIMITS ARE: LOWER (DAY/NIGHT) UPPER *** C*** ELECTRON DENSITY 60/80 KM 1000 KM *** C*** TEMPERATURES 120 KM 3000 KM *** C*** ION DENSITIES 100 KM 1000 KM *** C***************************************************************** C* --------------------ADDRESSES------------------------ * C* I PROF. K. RAWER DR. D. BILITZA I * C* I HERRENSTR. 43 GSFC/NSSDC CODE 633 I * C* I D-7801 MARCH GREENBELT MD 20771 I * C* I F.R.G. USA I * C* ----------------------------------------------------- * C***************************************************************** C***************************************************************** C***************************************************************** C********* ALL ANGLES ARE IN DEGREE ************** C********* ALL DENSITIES ARE IN M-3 ************** C********* ALL ALTITUDES ARE IN KM ************** C********* ALL TEMPERATURES ARE IN KELVIN ************** C********* ALL TIMES ARE IN DECIMAL HOURS ************** C***************************************************************** C******************** OPTIONS ********************************** C***************************************************************** C* FOR HMF2=0 OR FOF2=0 THE F2 PEAK VALUES ARE CALCULATED WITH * C* THE CCIR OR URSI MODELS. THE CCIR COEFFICIENT SET FOR THE * C* MONTH "mm" IS EXPECTED IN THE BINARY FILE "CCIRmm.BIN" AND * C* THE URSI SET IN "URSImm.BIN". IF YOU USE THE ASCII CODED * C* FILES "CCIRmm.ASC", YOU HAVE TO INCORPORATE THE CHANGES * C* INDICTED IN PROGRAM SECTION ENTITLED "READ CCIR COEFFICIENT * C* SET FOR CHOSEN MONTH." * C***************************************************************** C***************************************************************** C***************************************************************** C SUBROUTINE IRI90(JF,JMAG,ALATI,ALONG,RZ12,MMDD,DHOUR, & ZKM,NZ,DIRECT,OUTF,OARR) dimension zkm(nz), outf(11,nz), oarr(30) character*(*) direct character*50 path character*10 filename INTEGER EGNR,AGNR,DAYNR,DDO,DO2,SEASON,SEADAY REAL LATI,LONGI,MO2,MO,MODIP,NMF2,MAGBR REAL NMF1,NME,NMD,NEI,MM,MLAT,MLONG,NOBO2 DIMENSION F(3),RIF(4),E(4),XDELS(4),DNDS(4) DIMENSION FF0(988),XM0(441),F2(13,76,2),FM3(9,49,2) DIMENSION AMP(4),HXL(4),SCL(4),B0B1(5) DIMENSION CTN(3),CTNN(3),XSM(4),MM(5),DTI(4) DIMENSION AHH(7),STTE(6),DTE(5),ATE(7),TEA(6),HOA(3),XNAR(3) DIMENSION PG1O(80),PG2O(32),PG3O(80),PF1O(12),PF2O(4),PF3O(12) DIMENSION HO(4),MO(5),DDO(4),HO2(2),MO2(3),DO2(2),DION(7) LOGICAL EXT,SCHALT,NIGHT,TCON(3) LOGICAL F1REG,FOF2IN,HMF2IN,URSIF2,LAYVER,DY,GULB0 LOGICAL NODEN,NOTEM,NOION,TENEOP LOGICAL OLD79,TOPSI,BOTTO,BELOWE,JF(12),URSIFO COMMON /BLOCK1/HMF2,NMF2,HMF1 /CONST/UMR & /BLOCK2/B0,B1,C1 /BLOCK3/HZ,T,HST,STR & /BLOCK4/HME,NME,HEF /BLOCK5/NIGHT,E & /BLOCK6/HMD,NMD,HDX /BLOCK7/D1,XKK,FP30,FP3U,FP1,FP2 & /BLOCK8/HS,TNHS,XSM,MM,DTI,MXSM & /BLOTN/XSM1,TEXOS,TLBDH,SIGMA /BLOTE/AHH,ATE1,STTE,DTE & /BLO10/BETA,ETA,DELTA,ZETA /ARGEXP/ARGMAX EXTERNAL XE1,XE2,XE3,XE4,XE5,XE6,TEDER DATA HOA /300.,400.,600./, XNAR /3*0.0/, & XDELS /3*5.,10./, DNDS /.016,.01,2*.016/, & DDO /9,5,5,25/, DO2 /5,5/, & B0B1 /.755566,.778596,.797332,.812928,.826146/ data icalls/0/ C SAVE EGNR,AGNR,DAYNR,DO2,SEASON,SEADAY,LATI,LONGI,MO2, & MODIP,MAGBR,NMF1,NEI,MLAT,MLONG,NOBO2, & F,RIF,FF0,XM0,F2,FM3,AMP,HXL,SCL, & CTN,CTNN,ATE,TEA,HOA,XNAR,PG1O, & PG2O,PG3O,PF1O,PF2O,PF3O,HO,MO,DDO,HO2,DION,EXT, & SCHALT,SSIN,TCON,F1REG,FOF2IN,HMF2IN,URSIF2,LAYVER, & DY,GULB0,NODEN,NOTEM,NOION,TENEOP,OLD79,TOPSI,BOTTO,BELOWE, & URSIFO,MONTH,MONTHO,RG,RGO C C PROGAM CONSTANTS C icalls=icalls+1 ARGMAX=88.0 UMR=ATAN(1.0)*4./180. ALOG2=ALOG(2.) ALG100=ALOG(100.) ISTART=1 heibeg=zkm(1) heiend=zkm(nz) C C Code inserted to aleviate block data problem for PC version. C Thus avoiding DATA statement with parameters from COMMON block. C AHH(1)=120. AHH(2)=0. AHH(3)=300. AHH(4)=400. AHH(5)=600. AHH(6)=1400. AHH(7)=3000. DTE(1)=5. DTE(2)=5. DTE(3)=10. DTE(4)=20. DTE(5)=20. DTI(1)=10. DTI(2)=10. DTI(3)=20. DTI(4)=20. C C FIRST SPECIFY YOUR COMPUTERS CHANNEL NUMBERS .................... C AGNR=OUTPUT (OUTPUT IS DISPLAYED OR STORED IN FILE OUTPUT.IRI)... C IUCCIR=UNIT NUMBER FOR CCIR COEFFICIENTS ........................ C MONITO=6 IUCCIR=10 KONSOL=6 IF (JF(12)) KONSOL=12 c c selection of density and ion composition options .................. c NODEN=(.NOT.JF(1)) NOTEM=(.NOT.JF(2)) NOION=(.NOT.JF(3)) DY=(.NOT.JF(6)) LAYVER=(.NOT.JF(11)) OLD79=(.NOT.JF(7)) GULB0=(.NOT.JF(4)) c c f peak density .................................................... c FOF2IN=(.NOT.JF(8)) IF(FOF2IN) THEN AFOF2=OARR(1) IF(AFOF2.GT.100.) AFOF2=SQRT(AFOF2/1.24E10) ENDIF URSIF2=(.NOT.JF(5)) c c f peak altitude .................................................. c HMF2IN=(.NOT.JF(9)) IF(HMF2IN) AHMF2=OARR(2) c C TE-NE MODEL OPTION .............................................. C TENEOP=(.NOT.JF(10)) IF(TENEOP) THEN DO 8154 JXNAR=1,3 XNAR(JXNAR)=OARR(JXNAR+2) TCON(JXNAR)=.FALSE. 8154 IF(XNAR(JXNAR).GT.0.) TCON(JXNAR)=.TRUE. ENDIF if(icalls.gt.1) goto 8201 write(konsol,*) '*** IRI parameters are being calculated ***' if(NODEN) goto 2889 if(LAYVER) write(konsol,*) 'Ne, E-F: The LAY-Version is ', & 'prelimenary. Erroneous profile features can occur.' if(GULB0) write(konsol,*) 'Ne, B0: Bottomside thickness is ', & 'obtained with Gulyaeva-1987 model.' if(OLD79) write(konsol,*) 'Ne: Using IRI-79. Correction', & ' of equatorial topside is not included.' if(HMF2IN) write(konsol,*) 'Ne, hmF2: Input values are used.' if(FOF2IN) then write(konsol,*) 'Ne, foF2: Input values are used.' goto 2889 endif if(URSIF2) then write(konsol,*) 'Ne, foF2: URSI model is used.' else write(konsol,*) 'Ne, foF2: CCIR model is used.' endif 2889 if((.not.NOION).and.(DY)) & write(konsol,*) 'Ion Com.: Using Danilov-Yaichnikov-1985.' if((.not.NOTEM).and.(TENEOP)) & write(konsol,*) 'Te: Temperature-density correlation is used' 8201 continue C C CALCULATION OF MEAN F10.7CM SOLAR RADIO FLUX (COV)................ C CALCULATION OF RESTRICTED SOLAR ACTIVITIES (RG,COVG).............. C IF(RZ12.GE.0.0) THEN R=RZ12 COV=63.75+R*(0.728+R*0.00089) ELSE COV=-RZ12 R=33.52*(SQRT(COV+85.12)-12.2) ENDIF RG=R COVG=COV IF(R.GT.150.) RG=150. IF(COV.GT.193.) COVG=193. C C CALCULATION OF GEOG. OR GEOM. COORDINATES IN DEG.................... C CALCULATION OF MAGNETIC INCLINATION (DIP), DECLINATION (DEC)........ C DIP LATITUDE (MAGBR) AND MODIFIED DIP (MODIP). ALL IN DEGREE...... C IF(JMAG.GT.0) THEN MLAT=ALATI MLONG=ALONG if (mlong .lt. 0.) mlong=mlong+360. ELSE LATI=ALATI LONGI=ALONG if (longi .lt. 0.) longi=longi+360. ENDIF CALL GGM(JMAG,LONGI,LATI,MLONG,MLAT) ABSLAT=ABS(LATI) CALL FIELDG(LATI,LONGI,300.0,XMA,YMA,ZMA,BET,DIP,DEC,MODIP) MAGBR=ATAN(0.5*TAN(DIP*UMR))/UMR ABSMLT=ABS(MLAT) ABSMDP=ABS(MODIP) ABSMBR=ABS(MAGBR) C C CALCULATION OF SEASON (SUMMER=2, WINTER=4).......................... C CALCULATION OF DAY OF YEAR AND SUN DECLINATION...................... C if(MMDD.lt.0) then DAYNR=-MMDD call MODA(1,MONTH,IDAY,DAYNR) else MONTH=MMDD/100 IDAY=MMDD-MONTH*100 call MODA(0,MONTH,IDAY,DAYNR) endif SEASON=INT((DAYNR+45.0)/92.0) IF(SEASON.LT.1) SEASON=4 NSESON=SEASON seaday=daynr IF(LATI.GT.0.0) GOTO 5592 SEASON=SEASON-2 IF(SEASON.LT.1) SEASON=SEASON+4 seaday=daynr+183 if(seaday.gt.366) seaday=seaday-366 C C CALCULATION OF SOLAR ZENITH ANGLE (XHI/DEG)......................... C NOON VALUE (XHINON)................................................. C 5592 IF(DHOUR.GT.24.1) THEN UT=DHOUR-25. HOUR=UT+LONGI/15. IF(HOUR.GT.24.) HOUR=HOUR-24. ELSE HOUR=DHOUR UT=HOUR-LONGI/15. IF(UT.LT.0.) UT=UT+24. ENDIF CALL SOCO(DAYNR,HOUR,LATI,LONGI,SUNDEC,XHI,SAX,SUX) CALL SOCO(DAYNR,12.0,LATI,LONGI,SUNDE1,XHINON,SAXNON,SUXNON) NIGHT=.FALSE. if(abs(sax).gt.25.0) then if(sax.lt.0.0) NIGHT=.TRUE. goto 1334 endif if(SAX.le.SUX) goto 1386 if((hour.gt.sux).and.(hour.lt.sax)) night=.true. goto 1334 1386 IF((HOUR.GT.SUX).OR.(HOUR.LT.SAX)) NIGHT=.TRUE. C C CALCULATION OF ELECTRON DENSITY PARAMETERS................ C 1334 HNEA=65. IF(NIGHT) HNEA=80. HNEE=2000. IF(NODEN) GOTO 4933 DELA=4.32 IF(ABSMDP.GE.18.) DELA=1.0+EXP(-(ABSMDP-30.0)/10.0) DELL=1+EXP(-(ABSLAT-20.)/10.) C!!!!!!! F-REGION PARAMETERS AND E-PEAK !!!!!!!!!!!!!!!!!!!!!!!!!! FOE=FOEEDI(COV,XHI,XHINON,ABSLAT) NME=1.24E10*FOE*FOE HME=105.0 IF((FOF2IN).AND.(HMF2IN)) GOTO 501 IF (URSIF2 .NEQV. URSIFO) GOTO 7797 IF((MONTH.EQ.MONTHO).AND.(RG.EQ.RGO)) GOTO 4292 IF(MONTH.EQ.MONTHO) GOTO 4291 C C READ CCIR COEFFICIENT SET FOR CHOSEN MONTH.................... C 7797 WRITE(filename,104) MONTH+10 104 FORMAT('ccir',I2,'.asc') call dfp(direct,filename,path) OPEN(IUCCIR,FILE=path,STATUS='OLD',ERR=8448) READ(IUCCIR,4689) F2,FM3 4689 FORMAT(4E15.8) CLOSE(IUCCIR) C C READ URSI COEFFICIENT SET FOR CHOSEN MONTH.................... C if (URSIF2) then WRITE(filename,1144) MONTH+10 1144 FORMAT('ursi',I2,'.asc') call dfp(direct,filename,path) OPEN(IUCCIR,FILE=path,STATUS='OLD',ERR=8448) READ(IUCCIR,4689) F2 CLOSE(IUCCIR) endif URSIFO=URSIF2 MONTHO=MONTH GOTO 4291 8448 write(monito,8449) path 8449 format(' IRI90: File ',A50,'not found') stop C C LINEAR INTERPOLATION IN SOLAR ACTIVITY C 4291 RR2=RG/100. RR1=1.-RR2 DO 20 I=1,76 DO 20 J=1,13 K=J+13*(I-1) 20 FF0(K)=F2(J,I,1)*RR1+F2(J,I,2)*RR2 DO 30 I=1,49 DO 30 J=1,9 K=J+9*(I-1) 30 XM0(K)=FM3(J,I,1)*RR1+FM3(J,I,2)*RR2 RGO=RG 4292 CALL F2OUT(MODIP,LATI,LONGI,FF0,XM0,UT,YFOF2,XM3000) 501 IF(FOF2IN) THEN FOF2=AFOF2 ELSE FOF2=YFOF2 ENDIF NMF2=1.24E10*FOF2*FOF2 IF(HMF2IN) THEN HMF2=AHMF2 ELSE HMF2=HMF2ED(MAGBR,RG,FOF2/FOE,XM3000) ENDIF TOPSI=(HEIEND.GT.HMF2) BOTTO=((HEIEND.GE.HME).AND.(HEIBEG.LE.HMF2)) BELOWE=(HEIBEG.LT.HME) c c topside profile parameters ............................. c IF(.NOT.TOPSI) GOTO 1501 COS2=COS(MLAT*UMR) COS2=COS2*COS2 FLU=(COVG-40.0)/30.0 IF(OLD79) then ETA1=-0.0070305*COS2 else EX=EXP(-MLAT/15.) EX1=EX+1 EPIN=4.*EX/(EX1*EX1) ETA1=-0.02*EPIN endif ETA=0.058798+ETA1+FLU*(-0.014065+0.0069724*COS2)+ &(0.0024287+0.0042810*COS2-0.00015280*FOF2)*FOF2 ZETA=0.078922-0.0046702*COS2+FLU*(-0.019132+0.0076545*COS2)+ &(0.0032513+0.0060290*COS2-0.00020872*FOF2)*FOF2 BETA=-128.03+20.253*COS2+FLU*(-8.0755-0.65896*COS2)+(0.44041 &+0.71458*COS2-0.042966*FOF2)*FOF2 Z=EXP(94.45/BETA) Z1=Z+1 Z2=Z/(BETA*Z1*Z1) DELTA=(ETA/Z1-ZETA/2.0)/(ETA*Z2+ZETA/400.0) c c bottomside profile parameters ............................. C 1501 HMF1=HMF2 HZ=HMF2 HEF=HME IF(.not.BOTTO) GOTO 2727 B1=3.0 C!!!!!!! INTERPOLATION FOR B0 OUT OF ARRAY B0F !!!!!!!!!!!!!!!!!!!!! if(GULB0) then call ROGUL(SEADAY,XHI,SEAX,GRAT) if(NIGHT) GRAT=0.91-HMF2/4000. B0CNEW=HMF2*(1.-GRAT) B0=B0CNEW/B0B1(1) else B0 = B0POL(HOUR,SAX,SUX,SEASON,RG,DELA) endif C!!!!!!! F1-REGION PARAMETERS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! F1REG=.FALSE. HMF1=0. PNMF1=0. C1=0. IF(NIGHT.OR.(SEASON.EQ.4)) GOTO 150 FOF1=FOF1ED(ABSMBR,R,XHI) IF(FOF1.LT.1.E-3) GOTO 150 F1REG=.TRUE. C1=.09+.11/DELA PNMF1=1.24E10*FOF1*FOF1 150 NMF1=PNMF1 C!!!!!!! PARAMETER FOR E AND VALLEY-REGION !!!!!!!!!!!!!!!!!!!!! XDEL=XDELS(SEASON)/DELA DNDHBR=DNDS(SEASON)/DELA HDEEP=HPOL(HOUR,10.5/DELA,28.,SAX,SUX,1.,1.) WIDTH=HPOL(HOUR,17.8/DELA,45.+22./DELA,SAX,SUX,1.,1.) DEPTH=HPOL(HOUR,XDEL,81.,SAX,SUX,1.,1.) DLNDH=HPOL(HOUR,DNDHBR,.06,SAX,SUX,1.,1.) IF(DEPTH.LT.1.0) GOTO 600 IF(NIGHT) DEPTH=-DEPTH CALL TAL(HDEEP,DEPTH,WIDTH,DLNDH,EXT,E) IF(.NOT.EXT) GOTO 667 WRITE(KONSOL,650) 650 FORMAT(1X,'*NE* E-REGION VALLEY CAN NOT BE MODELLED') 600 WIDTH=.0 667 HEF=HME+WIDTH VNER = (1. - ABS(DEPTH) / 100.) * NME c c Parameters below E ............................. c 2727 IF(.not.BELOWE) GOTO 2726 C!!!!!!!D-REGION PARAMETER!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! NMD=XMDED(XHI,R,4.0E8) HMD=HPOL(HOUR,81.0,88.0,SAX,SUX,1.,1.) F(1)=HPOL(HOUR,0.02+0.03/DELA,0.05,SAX,SUX,1.,1.) F(2)=HPOL(HOUR,4.6,4.5,SAX,SUX,1.,1.) F(3)=HPOL(HOUR,-11.5,-4.0,SAX,SUX,1.,1.) FP1=F(1) FP2=-FP1*FP1/2.0 FP30=(-F(2)*FP2-FP1+1.0/F(2))/(F(2)*F(2)) FP3U=(-F(3)*FP2-FP1-1.0/F(3))/(F(3)*F(3)) HDX=HMD+F(2) X=HDX-HMD XDX=NMD*EXP(X*(FP1+X*(FP2+X*FP30))) DXDX=XDX*(FP1+X*(2.0*FP2+X*3.0*FP30)) X=HME-HDX XKK=-DXDX*X/(XDX*ALOG(XDX/NME)) D1=DXDX/(XDX*XKK*X**(XKK-1.0)) C C SEARCH FOR HMF1 .................................................. C 2726 IF(.not.BOTTO) GOTO 4933 if(LAYVER) goto 6153 924 IF(.not.F1REG) GOTO 380 XE2H=XE2(HEF) CALL REGFA1(HEF,HMF2,XE2H,NMF2,0.001,NMF1,XE2,SCHALT,HMF1) IF(.not.SCHALT) GOTO 380 WRITE(KONSOL,11) 11 FORMAT(1X,'*NE* HMF1 IS NOT EVALUATED BY THE FUNCTION XE2') IREGFA=1 c c change B1 and try again .......................................... c 9244 IF(B1.GT.4.5) GOTO (7398,8922) IREGFA B1=B1+0.5 WRITE(KONSOL,902) B1-0.5,B1 902 FORMAT(6X,'CORR.: B1(OLD)=',F4.1,' B1(NEW)=',F4.1) IF(GULB0) then ib1=int(b1*2.-5.) B0=B0CNEW/b0b1(ib1) endif GOTO 924 c c omit F1 feature .................................................... c 7398 WRITE(KONSOL,9269) 9269 FORMAT(1X,'CORR.: NO F1 REGION, B1=3, C1=0.0') HMF1=0. NMF1=0. C1=0.0 B1=3. F1REG=.FALSE. C C SEARCH FOR HST [NE3(HST)=NME] .......................................... C 380 RRRR=0.5 IF(F1REG) then hf1=hmf1 xf1=nmf1 GOTO 3972 ENDIF RATHH=0.5 3973 hf1=hef+(hmf2-hef)*RATHH xf1=xe3(hf1) IF(XF1.LT.NME) THEN RATHH=RATHH+.1 GOTO 3973 ENDIF 3972 h=hf1 deh=10. XXMIN=XF1 HHMIN=HF1 3895 h=h-deh if(h.lt.HEF) then h=h+2*deh deh=deh/10. if(deh.lt.1.) goto 3885 endif XE3H=XE3(h) IF(XE3H.LT.XXMIN) then XXMIN=XE3H HHMIN=h endif if(XE3H.gt.NME) goto 3895 CALL REGFA1(h,HF1,XE3H,XF1,0.001,NME,XE3,SCHALT,HST) STR=HST IF(.not.SCHALT) GOTO 360 3885 WRITE(KONSOL,100) 100 FORMAT(1X,'*NE* HST IS NOT EVALUATED BY THE FUNCTION XE3') IREGFA=2 IF(XXMIN/NME.LT.1.3) GOTO 9244 c c assume linear interpolation between HZ and HEF .................. c 8922 HZ=HHMIN+(HF1-HHMIN)*RRRR XNEHZ=XE3(HZ) if(xnehz-nme.lt.0.001) then RRRR=RRRR+.1 GOTO 8922 endif WRITE(KONSOL,901) HZ,HEF 901 FORMAT(6X,'CORR.: LIN. APP. BETWEEN HZ=',F5.1, & ' AND HEF=',F5.1) T=(XNEHZ-NME)/(HZ-HEF) HST=-333. GOTO 4933 c c calculate HZ, D and T ............................................ c 360 HZ=(HST+HF1)/2.0 D=HZ-HST T=D*D/(HZ-HEF-D) GOTO 4933 C C LAY-functions for middle ionosphere C 6153 HMF1M=165.+0.6428*XHI HHALF = GRAT * HMF2 HV1R = HME + WIDTH HV2R = HME + HDEEP HHMF2 = HMF2 CALL INILAY(NIGHT,NMF2,NMF1,NME,VNER,HHMF2,HMF1M,HME, & HV1R,HV2R,HHALF,HXL,SCL,AMP,IIQU) IF(IIQU.EQ.1) WRITE(KONSOL,7733) 7733 FORMAT('*NE* LAY amplitudes found with 2nd choice of HXL(1).') IF(IIQU.EQ.2) WRITE(KONSOL,7722) 7722 FORMAT('*NE* LAY amplitudes could not be found.') C---------- CALCULATION OF NEUTRAL TEMPERATURE PARAMETER------- 4933 HTA=120.0 HTE=3000.0 IF(NOTEM) GOTO 240 SEC=UT*3600. CALL CIRA86(DAYNR,SEC,LATI,LONGI,HOUR,COV,TEXOS,TN120,SIGMA) IF(HOUR.NE.0.0) THEN SECNI=(24.-LONGI/15.)*3600. CALL CIRA86(DAYNR,SECNI,LATI,LONGI,0.,COV,TEXNI,TN1NI,SIGNI) ELSE TEXNI=TEXOS TN1NI=TN120 SIGNI=SIGMA ENDIF TLBDH=TEXOS-TN120 TLBDN=TEXNI-TN1NI C C--------- CALCULATION OF ELECTRON TEMPERATURE PARAMETER-------- C 881 CONTINUE C !!!!!!!!!! TE(120KM)=TN(120KM) !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ATE(1)=TN120 C !!!!!!!!!! TE-MAXIMUM (JICAMARCA,ARECIBO) !!!!!!!!!!!!!!!!!!!! HMAXD=60.*EXP(-(MLAT/22.41)**2)+210. HMAXN=150. AHH(2)=HPOL(HOUR,HMAXD,HMAXN,SAX,SUX,1.,1.) TMAXD=800.*EXP(-(MLAT/33.)**2)+1500. TMAXN=TN(HMAXN,TEXNI,TLBDN,SIGNI)+20 ATE(2)=HPOL(HOUR,TMAXD,TMAXN,SAX,SUX,1.,1.) C !!!!!!!!!! TE(300,400KM)=TE-AE-C !!!!!!!!!!!!!!!!!!!!!!!!!!!!! C !!!!!!!!!! TE(1400,3000KM)=TE-ISIS !!!!!!!!!!!!!!!!!!!!!!!!!!! DIPLAT=MAGBR CALL TEBA(DIPLAT,HOUR,NSESON,TEA) ATE(3)=TEA(1) ATE(4)=TEA(2) ATE(6)=TEA(3) ATE(7)=TEA(4) C !!!!!!!!!! TE(600KM)=TE-AEROS !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! ETT=EXP(-MLAT/11.35) TET=2900.-5600.*ETT/((ETT+1)**2.) TEN=839.+1161./(1.+EXP(-(ABSMLT-45.)/5.)) ATE(5)=HPOL(HOUR,TET,TEN,SAX,SUX,1.5,1.5) C !!!!!!!!!! OPTION TO USE TE-NE-RELATION !!!!!!!!!!!!!!!!!!!!!! C !!!!!!!!!! AT 300, 400 OR 600 KM !!!!!!!!!!!!!!!!!!!!!!!!!!!! IF(TENEOP) THEN DO 3395 I=1,3 3395 IF(TCON(I)) ATE(I+2)=TEDE(HOA(I),XNAR(I),-COV) ENDIF C !!!!!!!!!! TE'S ARE CORRECTED !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! C !!!!!!!!!! ALSO TE > TN ENFORCED !!!!!!!!!!!!!!!!!!!!!!!!!!!!! TNAHH2=TN(AHH(2),TEXOS,TLBDH,SIGMA) IF(ATE(2).LT.TNAHH2) ATE(2)=TNAHH2 STTE1=(ATE(2)-ATE(1))/(AHH(2)-AHH(1)) DO 1901 I=2,6 TNAHHI=TN(AHH(I+1),TEXOS,TLBDH,SIGMA) IF(ATE(I+1).LT.TNAHHI) ATE(I+1)=TNAHHI STTE2=(ATE(I+1)-ATE(I))/(AHH(I+1)-AHH(I)) ATE(I)=ATE(I)-(STTE2-STTE1)*DTE(I-1)*ALOG2 1901 STTE1=STTE2 C !!!!!!!!!! GRADIENTS ARE CALCULATED WITH !!!!!!!!!!!!!!!!!!!! C !!!!!!!!!! CORRECTED REGION BOUNDARIES !!!!!!!!!!!!!!!!!!!!!! DO 1902 I=1,6 1902 STTE(I)=(ATE(I+1)-ATE(I))/(AHH(I+1)-AHH(I)) ATE1=ATE(1) 887 CONTINUE C C------------ CALCULATION OF ION TEMPERATURE PARAMETERS-------- C C !!!!!!!!!! TI(430KM,DAY)=TI-AEROS !!!!!!!!!!!!!!!!!!!!!!!!!!! XSM1=430.0 XSM(1)=XSM1 Z1=EXP(-0.09*MLAT) Z2=Z1+1. TID1 = 1240.0 - 1400.0 * Z1 / ( Z2 * Z2 ) MM(2)=HPOL(HOUR,3.0,0.0,SAX,SUX,1.,1.) C !!!!!!!!!! TI < TE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TED1=TEA(6)+30. IF(TID1.GT.TED1) TID1=TED1 C !!!!!!!!!! TI(430KM,NIGHT)=TI-AEROS !!!!!!!!!!!!!!!!!!!!!!!!! Z1=ABSMLT Z2=Z1*(0.47+Z1*0.024)*UMR Z3=COS(Z2) TIN1=1200.0-300.0*SIGN(1.0,Z3)*SQRT(ABS(Z3)) C !!!!!!!!!! TN < TI < TE !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! TEN1=TEA(5) TNN1=TN(XSM1,TEXNI,TLBDN,SIGNI) IF(TEN1.LT.TNN1) TEN1=TNN1 IF(TIN1.GT.TEN1) TIN1=TEN1 IF(TIN1.LT.TNN1) TIN1=TNN1 C !!!!!!!!!! TI(430KM,LT) FROM STEP FUNCTION !!!!!!!!!!!!!!!!!! TI1=TIN1 IF(TID1.GT.TIN1) TI1=HPOL(HOUR,TID1,TIN1,SAX,SUX,1.,1.) C !!!!!!!!!! TANGENT ON TN DETERMINES HS !!!!!!!!!!!!!!!!!!!!!! TI13=TEDER(130.) TI50=TEDER(500.) CALL REGFA1(130.0,500.0,TI13,TI50,0.01,TI1,TEDER,SCHALT,HS) IF(SCHALT) HS=200. TNHS=TN(HS,TEXOS,TLBDH,SIGMA) MM(1)=DTNDH(HS,TEXOS,TLBDH,SIGMA) IF(SCHALT) MM(1)=(TI1-TNHS)/(XSM1-HS) MXSM=2 C !!!!!!!!!! XTETI ALTITTUDE WHERE TE=TI !!!!!!!!!!!!!!!!!!!!!! 2391 XTTS=500. X=500. 2390 X=X+XTTS IF(X.GE.AHH(7)) GOTO 240 TEX=ELTE(X) TIX=TI(X) IF(TIX.LT.TEX) GOTO 2390 X=X-XTTS XTTS=XTTS/10. IF(XTTS.GT.0.1) GOTO 2390 XTETI=X+XTTS*5. C !!!!!!!!!! TI=TE ABOVE XTETI !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! MXSM=3 MM(3)=STTE(6) XSM(2)=XTETI IF(XTETI.GT.AHH(6)) GOTO 240 MXSM=4 MM(3)=STTE(5) MM(4)=STTE(6) XSM(3)=AHH(6) IF(XTETI.GT.AHH(5)) GOTO 240 MXSM=5 DTI(1)=5. DTI(2)=5. MM(3)=STTE(4) MM(4)=STTE(5) MM(5)=STTE(6) XSM(3)=AHH(5) XSM(4)=AHH(6) C C CALCULATION OF ION DENSITY PARAMETER.................. C 240 IF(NOION) GOTO 141 HNIA=100. HNIE=2000. if(DY) goto 141 C C INPUT OF THE ION DENSITY PARAMETER ARRAYS PF1O,PF2O AND PF3O...... C RIF(1)=2. IF(ABSLAT.LT.30.0) RIF(1)=1. RIF(2)=2. IF(COV.LT.100.0) RIF(2)=1. RIF(3)=SEASON IF(SEASON.EQ.1) RIF(3)=3. RIF(4)=1. IF(NIGHT) RIF(4)=2. CALL KOEFP1(PG1O) CALL KOEFP2(PG2O) CALL KOEFP3(PG3O) CALL SUFE(PG1O,RIF,12,PF1O) CALL SUFE(PG2O,RIF, 4,PF2O) CALL SUFE(PG3O,RIF,12,PF3O) c c calculate O+ profile parameters c IF(ABS(XHI).LE.90.0) THEN ZZZ1=COS(XHI*UMR) ELSE ZZZ1=0.0 ENDIF msumo=4 RDOMAX=100.0 MO(1)=EPSTEP(PF1O(1),PF1O(2),PF1O(3),PF1O(4),ZZZ1) MO(2)=EPSTEP(PF1O(5),PF1O(6),PF1O(7),PF1O(8),ZZZ1) MO(3)=0.0 HO(1)=EPSTEP(PF1O(9),PF1O(10),PF1O(11),PF1O(12),ZZZ1) HO(2)=290.0 IF((RIF(2).EQ.2.).AND.(RIF(3).EQ.2.)) HO(2)=237.0 HO(4)=PF2O(1) ho05=pf2o(4) MO(4)=PF2O(2) MO(5)=PF2O(3) c c adjust gradient MO(4) of O+ profile segment above F peak c 7100 HO(3)=(ALG100-MO(5)*(HO(4)-ho05))/MO(4)+HO(4) IF(HO(3).LE.HO(2)+20.) THEN MO(4)=MO(4)-0.001 GOTO 7100 endif hfixo=(ho(2)+ho(3))/2. c c find height H0O of maximum O+ relative density c DELX=5.0 X=HO(2) YMAXX=0.0 7102 X=X+DELX Y=RPID(X,HFIXO,RDOMAX,msumo,MO,DDO,HO) IF(Y.LE.YMAXX) then if(delx.le.0.1) GOTO 7104 x=x-delx delx=delx/5. ELSE YMAXX=Y ENDIF GOTO 7102 7104 H0O=X-DELX/2. 7101 if(y.lt.100.0) goto 7103 rdomax=rdomax-0.01 y=rpid(h0o,hfixo,rdomax,msumo,mo,ddo,ho) goto 7101 7103 yo2h0o=100.-y yoh0o=y c c calculate parameters for O2+ profile c hfixo2 = pf3o(1) rdo2mx = pf3o(2) DO 7105 L=1,2 I = L * 2 HO2(L)=PF3O(1+I)+PF3O(2+I)*ZZZ1 7105 MO2(L+1)=PF3O(7+I)+PF3O(8+I)*ZZZ1 MO2(1)=PF3O(7)+PF3O(8)*ZZZ1 if(hfixo2.gt.ho2(1)) then ymo2z=mo2(2) else ymo2z=mo2(1) endif aldo21=alog(rdo2mx)+ymo2z*(ho2(1)-hfixo2) hfixo2=(ho2(2)+ho2(1))/2. rdo2mx=exp(aldo21+mo2(2)*(hfixo2-ho2(1))) c c make sure that rd(O2+) is less or equal 100-rd(O+) at O+ maximum c 7106 Y=RPID(H0O,hfixo2,rdo2mx,2,MO2,DO2,HO2) IF(Y.GT.yo2h0o) then MO2(3)=MO2(3)-0.02 GOTO 7106 endif c C use ratio of NO+ to O2+ density at O+ maximum to calculate c NO+ density above the O+ maximum (H0O) c IF(y.LT.1.) then NOBO2=0.0 ELSE NOBO2= (yo2h0o-y)/y ENDIF C C CALCULATION FOR THE REQUIRED HEIGHT RANGE....................... C 141 IF(.NOT.F1REG) HMF1=HZ DO 7397 KI=1,11 DO 7397 KK=1,nz 7397 OUTF(KI,KK)=-1. do 7118 kk=1,nz height=zkm(kk) 300 IF(NODEN) GOTO 330 IF((HEIGHT.GT.HNEE).OR.(HEIGHT.LT.HNEA)) GOTO 330 IF(LAYVER) THEN ELEDE=-9. IF(IIQU.LT.2) ELEDE=XEN(HEIGHT,HMF2,NMF2,HME,4,HXL,SCL,AMP) ELSE ELEDE=XE(HEIGHT) ENDIF OUTF(1,KK)=ELEDE 330 IF(NOTEM) GOTO 7108 IF((HEIGHT.GT.HTE).OR.(HEIGHT.LT.HTA)) GOTO 7108 TNH=TN(HEIGHT,TEXOS,TLBDH,SIGMA) TIH=TNH IF(HEIGHT.GE.HS) TIH=TI(HEIGHT) TEH=ELTE(HEIGHT) IF(TIH.LT.TNH) TIH=TNH IF(TEH.LT.TIH) TEH=TIH OUTF(2,KK)=TNH OUTF(3,KK)=TIH OUTF(4,KK)=TEH 7108 IF(NOION) GOTO 7118 IF((HEIGHT.GT.HNIE).OR.(HEIGHT.LT.HNIA)) GOTO 7118 if(DY) then call IONCOM(HEIGHT,XHI*UMR,LATI*UMR,COV,MONTH,DION) ROX=DION(1) RHX=DION(2) RNX=DION(3) RHEX=DION(4) RNOX=DION(5) RO2X=DION(6) RCLUST=DION(7) else ROX=RPID(HEIGHT,HFIXO,RDOMAX,msumo,MO,DDO,HO) RO2X=RPID(HEIGHT,HFIXO2,rdo2mx,2,MO2,DO2,HO2) CALL RDHHE(HEIGHT,H0O,ROX,RO2X,NOBO2,10.,RHX,RHEX) RNOX=RDNO(HEIGHT,H0O,RO2X,ROX,NOBO2) RNX=-1. RCLUST=-1. endif OUTF(5,KK)=ROX OUTF(6,KK)=RHX OUTF(7,KK)=RHEX OUTF(8,KK)=RO2X OUTF(9,KK)=RNOX OUTF(10,KK)=RNX OUTF(11,KK)=RCLUST 7118 continue C C ADDITIONAL PARAMETER FIELD OARR C IF(NODEN) GOTO 6192 OARR(1)=NMF2 OARR(2)=HMF2 OARR(3)=NMF1 OARR(4)=HMF1 OARR(5)=NME OARR(6)=HME OARR(7)=NMD OARR(8)=HMD OARR(9)=HHALF OARR(10)=B0 OARR(11)=VNER OARR(12)=HEF 6192 IF(NOTEM) GOTO 6092 OARR(13)=ATE(2) OARR(14)=AHH(2) OARR(15)=ATE(3) OARR(16)=ATE(4) OARR(17)=ATE(5) OARR(18)=ATE(6) OARR(19)=ATE(7) OARR(20)=ATE(1) OARR(21)=TI1 OARR(22)=XTETI 6092 OARR(23)=XHI OARR(24)=SUNDEC OARR(25)=DIP OARR(26)=MAGBR OARR(27)=MODIP 3330 CONTINUE RETURN END C C C Subroutine DFP, Stan Solomon, 3/92, splices filename to directory C subroutine dfp(direct,filename,path) character*(*) direct,filename,path character*50 blanks data blanks/' '/ path=blanks nch=len(direct) do 10 i=1,nch if (direct(i:i).ne.' ') goto 20 10 continue 20 lb=i do 30 i=nch,1,-1 if (direct(i:i).ne.' ') goto 40 30 continue 40 le=i if (lb.ge.nch .or. le.le.0) then path(1:10)=filename(1:10) else nd=le-lb+1 path(1:nd)=direct(lb:le) path(nd+1:nd+10)=filename(1:10) endif return end C C C C C IRIF12.FOR ------------------------------------- OCTOBER 1991 C************************************************************** c changes from IRIFU9 to IRIF10: c SOCO for solar zenith angle c ACOS and ASIN argument forced to be within -1 / +1 c EPSTEIN functions corrected for large arguments C************************************************************** c changes from IRIF10 to IRIF11: c LAY subroutines introduced c TEBA corrected for 1400 km C************************************************************** c changes from IRIF11 to IRIF12: C Neutral temperature subroutines now in CIRA86.FOR C TEDER changed C All names with 6 or more characters replaced C 10/29/91 XEN: 10^ in loop, instead of at the end C C************************************************************** C********** INTERNATIONAL REFERENCE IONOSPHERE **************** C************************************************************** C**************** FUNCTIONS,SUBROUTINES ********************* C************************************************************** C** NE: XE1,DXE1N,XE2,XE3,XE4,XE5,XE6,XE C** TE/TI: TEBA,SPHARM,ELTE,TEDE,TI,TEDER C** NI: RPID,RDHHE,RDNO,KOEFP1,KOEFP2,KOEFP3,SUFE C** PEAKS: F2OUT,HMF2ED,FOF1ED,FOEEDI,XMDED,GAMMA1 C** MAG. FIELD: GGM,FIELDG C** FUNCTIONS: REGFA1,TAL C** TIME: SOCO,HPOL,MODA C** INTERPOL.: B0POL C** EPSTEIN: RLAY,D1LAY,D2LAY,EPTR,EPST,EPSTEP,EPLA C** LAY: XE2TO5,XEN,ROGUL,VALGUL,LNGLSN,LSKNM,INILAY C** NI-new: IONCOM, RPDA C************************************************************** C C************************************************************** C*** -------------------ADDRESSES------------------------ *** C*** I PROF. K. RAWER DR. D. BILITZA I *** C*** I HERRENSTR. 43 GSFC CODE 933 I *** C*** I 7801 MARCH 1 GREENBELT MD 20771 I *** C*** I F.R.G. USA I *** C*** ---------------------------------------------------- *** C************************************************************** C************************************************************** C C************************************************************* C*************** ELECTRON DENSITY **************************** C************************************************************* C C FUNCTION XE1(H) c---------------------------------------------------------------- C REPRESENTING ELECTRON DENSITY(M-3) IN THE TOPSIDE IONOSPHERE C (H=HMF2....1000 KM) BY HARMONIZED BENT-MODEL ADMITTING C VARIABILITY OFGLOBAL PARAMETER ETA,ZETA,BETA,DELTA WITH C GEOM. LATITUDE, SMOOTHED SOLAR FLUX AND CRITICAL FREQUENCY C (SEE MAIN PROGRAM). C [REF.:K.RAWER,S.RAMAKRISHNAN,1978] c---------------------------------------------------------------- COMMON /BLOCK1/ HMF2,XNMF2,HMF1 & /BLO10/ BETA,ETA,DELTA,ZETA & /ARGEXP/ ARGMAX DXDH = (1000.-HMF2)/700. x0 = 300. - delta xmx0 = (H-HMF2)/DXDH x = xmx0 + x0 eptr1 = eptr(x,beta,394.5) - eptr(x0,beta,394.5) eptr2 = eptr(x,100.,300.0) - eptr(x0,100.,300.0) y = BETA * ETA * eptr1 + ZETA * (100. * eptr2 - xmx0) Y = y * dxdh if(abs(Y).gt.argmax) Y = sign(argmax,Y) XE1 = XNMF2 * EXP(-Y) RETURN END C C FUNCTION DXE1N(H) C LOGARITHMIC DERIVATIVE OF FUNCTION XE1 (KM-1). COMMON /BLOCK1/ HMF2,XNMF2,HMF1 & /BLO10/ BETA,ETA,DELTA,ZETA x0 = 300. - delta X=(H-HMF2)/(1000.0-HMF2)*700.0 + x0 epst2 = epst(x,100.0,300.0) epst1 = epst(x,beta ,394.5) DXE1N = - ETA * epst1 + ZETA * (1. - epst2) RETURN END C C REAL FUNCTION XE2(H) C ELECTRON DENSITY FOR THE BOTTOMSIDE F-REGION (HMF1...HMF2). COMMON /BLOCK1/HMF2,XNMF2,HMF1 & /BLOCK2/B0,B1,C1 /ARGEXP/ARGMAX X=(HMF2-H)/B0 z=x**b1 if(z.gt.argmax) z=argmax XE2=XNMF2*EXP(-z)/COSH(X) RETURN END C C REAL FUNCTION XE3(H) C ELECTRON DENSITY FOR THE F1-LAYER (HZ.....HMF1). COMMON /BLOCK1/ HMF2,XNMF2,HMF1 & /BLOCK2/ B0,B1,C1 XE3=XE2(H)+XNMF2*C1*SQRT(ABS(HMF1-H)/B0) RETURN END C C REAL FUNCTION XE4(H) C ELECTRON DENSITY FOR THE INDERMEDIUM REGION (HEF..HZ). COMMON /BLOCK3/ HZ,T,HST,STR & /BLOCK4/ HME,XNME,HEF IF(HST.LT.0.) GOTO 100 XE4=XE3(HZ+T/2.0-SIGN(1.0,T)*SQRT(T*(HZ-H+T/4.0))) RETURN 100 XE4=XNME+T*(H-HEF) RETURN END C C REAL FUNCTION XE5(H) C ELECTRON DENSITY FOR THE E AND VALLEY REGION (HME..HEF). LOGICAL NIGHT COMMON /BLOCK4/ HME,XNME,HEF & /BLOCK5/ NIGHT,E(4) T3=H-HME T1=T3*T3*(E(1)+T3*(E(2)+T3*(E(3)+T3*E(4)))) IF(NIGHT) GOTO 100 XE5=XNME*(1+T1) RETURN 100 XE5=XNME*EXP(T1) RETURN END C C REAL FUNCTION XE6(H) C ELECTRON DENSITY FOR THE D REGION (HA...HME). COMMON /BLOCK4/ HME,XNME,HEF & /BLOCK6/ HMD,XNMD,HDX & /BLOCK7/ D1,XKK,FP30,FP3U,FP1,FP2 IF(H.GT.HDX) GOTO 100 Z=H-HMD FP3=FP3U IF(Z.GT.0.0) FP3=FP30 XE6=XNMD*EXP(Z*(FP1+Z*(FP2+Z*FP3))) RETURN 100 Z=HME-H XE6=XNME*EXP(-D1*Z**XKK) RETURN END C C REAL FUNCTION XE(H) C ELECTRON DENSITY BEETWEEN HA(KM) AND 1000 KM C SUMMARIZING PROCEDURES NE1....6; COMMON /BLOCK1/HMF2,XNMF2,HMF1 & /BLOCK3/HZ,T,HST,STR & /BLOCK4/HME,XNME,HEF IF(H.LT.HMF2) GOTO 100 XE=XE1(H) RETURN 100 IF(H.LT.HMF1) GOTO 300 XE=XE2(H) RETURN 300 IF(H.LT.HZ) GOTO 400 XE=XE3(H) RETURN 400 IF(H.LT.HEF) GOTO 500 XE=XE4(H) RETURN 500 IF(H.LT.HME) GOTO 600 XE=XE5(H) RETURN 600 XE=XE6(H) RETURN END C C********************************************************** C***************** ELECTRON TEMPERATURE ******************** C********************************************************** C SUBROUTINE TEBA(DIPL,SLT,NS,TE) C CALCULATES ELECTRON TEMPERATURES TE(1) TO TE(4) AT ALTITUDES C 300, 400, 1400 AND 3000 KM FOR DIP-LATITUDE DIPL/DEG AND C LOCAL SOLAR TIME SLT/H USING THE BRACE-THEIS-MODELS (J. ATMOS. C TERR. PHYS. 43, 1317, 1981); NS IS SEASON IN NORTHERN C HEMISOHERE: IS=1 SPRING, IS=2 SUMMER .... C ALSO CALCULATED ARE THE TEMPERATURES AT 400 KM ALTITUDE FOR C MIDNIGHT (TE(5)) AND NOON (TE(6)). DIMENSION C(4,2,81),A(82),TE(6) COMMON/CONST/UMR DATA (C(1,1,J),J=1,81)/ &.3100E1,-.3215E-2,.2440E+0,-.4613E-3,-.1711E-1,.2605E-1, &-.9546E-1,.1794E-1,.1270E-1,.2791E-1,.1536E-1,-.6629E-2, &-.3616E-2,.1229E-1,.4147E-3,.1447E-2,-.4453E-3,-.1853, &-.1245E-1,-.3675E-1,.4965E-2,.5460E-2,.8117E-2,-.1002E-1, &.5466E-3,-.3087E-1,-.3435E-2,-.1107E-3,.2199E-2,.4115E-3, &.6061E-3,.2916E-3,-.6584E-1,.4729E-2,-.1523E-2,.6689E-3, &.1031E-2,.5398E-3,-.1924E-2,-.4565E-1,.7244E-2,-.8543E-4, &.1052E-2,-.6696E-3,-.7492E-3,.4405E-1,.3047E-2,.2858E-2, &-.1465E-3,.1195E-2,-.1024E-3,.4582E-1,.8749E-3,.3011E-3, &.4473E-3,-.2782E-3,.4911E-1,-.1016E-1,.27E-2,-.9304E-3, &-.1202E-2,.2210E-1,.2566E-2,-.122E-3,.3987E-3,-.5744E-1, &.4408E-2,-.3497E-2,.83E-3,-.3536E-1,-.8813E-2,.2423E-2, &-.2994E-1,-.1929E-2,-.5268E-3,-.2228E-1,.3385E-2, &.413E-1,.4876E-2,.2692E-1,.1684E-2/ DATA (C(1,2,J),J=1,81)/.313654E1,.6796E-2,.181413,.8564E-1, &-.32856E-1,-.3508E-2,-.1438E-1,-.2454E-1,.2745E-2,.5284E-1, &.1136E-1,-.1956E-1,-.5805E-2,.2801E-2,-.1211E-2,.4127E-2, &.2909E-2,-.25751,-.37915E-2,-.136E-1,-.13225E-1,.1202E-1, &.1256E-1,-.12165E-1,.1326E-1,-.7123E-1,.5793E-3,.1537E-2, &.6914E-2,-.4173E-2,.1052E-3,-.5765E-3,-.4041E-1,-.1752E-2, &-.542E-2,-.684E-2,.8921E-3,-.2228E-2,.1428E-2,.6635E-2,-.48045E-2, &-.1659E-2,-.9341E-3,.223E-3,-.9995E-3,.4285E-1,-.5211E-3, &-.3293E-2,.179E-2,.6435E-3,-.1891E-3,.3844E-1,.359E-2,-.8139E-3, &-.1996E-2,.2398E-3,.2938E-1,.761E-2,.347655E-2,.1707E-2,.2769E-3, &-.157E-1,.983E-3,-.6532E-3,.929E-4,-.2506E-1,.4681E-2,.1461E-2, &-.3757E-5,-.9728E-2,.2315E-2,.6377E-3,-.1705E-1,.2767E-2, &-.6992E-3,-.115E-1,-.1644E-2,.3355E-2,-.4326E-2,.2035E-1,.2985E-1/ DATA (C(2,1,J),J=1,81)/.3136E1,.6498E-2,.2289,.1859E-1,-.3328E-1, &-.4889E-2,-.3054E-1,-.1773E-1,-.1728E-1,.6555E-1,.1775E-1, &-.2488E-1,-.9498E-2,.1493E-1,.281E-2,.2406E-2,.5436E-2,-.2115, &.7007E-2,-.5129E-1,-.7327E-2,.2402E-1,.4772E-2,-.7374E-2, &-.3835E-3,-.5013E-1,.2866E-2,.2216E-2,.2412E-3,.2094E-2,.122E-2 &,-.1703E-3,-.1082,-.4992E-2,-.4065E-2,.3615E-2,-.2738E-2, &-.7177E-3,.2173E-3,-.4373E-1,-.375E-2,.5507E-2,-.1567E-2, &-.1458E-2,-.7397E-3,.7903E-1,.4131E-2,.3714E-2,.1073E-2, &-.8991E-3,.2976E-3,.2623E-1,.2344E-2,.5608E-3,.4124E-3,.1509E-3, &.5103E-1,.345E-2,.1283E-2,.7238E-3,-.3464E-4,.1663E-1,-.1644E-2, &-.71E-3,.5281E-3,-.2729E-1,.3556E-2,-.3391E-2,-.1787E-3,.2154E-2, &.6476E-2,-.8282E-3,-.2361E-1,.9557E-3,.3205E-3,-.2301E-1, &-.854E-3,-.1126E-1,-.2323E-2,-.8582E-2,.2683E-1/ DATA (C(2,2,J),J=1,81)/.3144E1,.8571E-2,.2539,.6937E-1,-.1667E-1, &.2249E-1,-.4162E-1,.1201E-1,.2435E-1,.5232E-1,.2521E-1,-.199E-1, &-.7671E-2,.1264E-1,-.1551E-2,-.1928E-2,.3652E-2,-.2019,.5697E-2, &-.3159E-1,-.1451E-1,.2868E-1,.1377E-1,-.4383E-2,.1172E-1, &-.5683E-1,.3593E-2,.3571E-2,.3282E-2,.1732E-2,-.4921E-3,-.1165E-2 &,-.1066,-.1892E-1,.357E-2,-.8631E-3,-.1876E-2,-.8414E-4,.2356E-2, &-.4259E-1,-.322E-2,.4641E-2,.6223E-3,-.168E-2,-.1243E-3,.7393E-1, &-.3143E-2,-.2362E-2,.1235E-2,-.1551E-2,.2099E-3,.2299E-1,.5301E-2 &,-.4306E-2,-.1303E-2,.7687E-5,.5305E-1,.6642E-2,-.1686E-2, &.1048E-2,.5958E-3,.4341E-1,-.8819E-4,-.333E-3,-.2158E-3,-.4106E-1 &,.4191E-2,.2045E-2,-.1437E-3,-.1803E-1,-.8072E-3,-.424E-3, &-.26E-1,-.2329E-2,.5949E-3,-.1371E-1,-.2188E-2,.1788E-1, &.6405E-3,.5977E-2,.1333E-1/ DATA (C(3,1,J),J=1,81)/.3372E1,.1006E-1,.1436,.2023E-2,-.5166E-1, &.9606E-2,-.5596E-1,.4914E-3,-.3124E-2,-.4713E-1,-.7371E-2, &-.4823E-2,-.2213E-2,.6569E-2,-.1962E-3,.3309E-3,-.3908E-3, &-.2836,.7829E-2,.1175E-1,.9919E-3,.6589E-2,.2045E-2,-.7346E-2 &,-.89E-3,-.347E-1,-.4977E-2,.147E-2,-.2823E-5,.6465E-3, &-.1448E-3,.1401E-2,-.8988E-1,-.3293E-4,-.1848E-2,.4439E-3, &-.1263E-2,.317E-3,-.6227E-3,.1721E-1,-.199E-2,-.4627E-3, &.2897E-5,-.5454E-3,.3385E-3,.8432E-1,-.1951E-2,.1487E-2, &.1042E-2,-.4788E-3,-.1276E-3,.2373E-1,.2409E-2,.5263E-3, &.1301E-2,-.4177E-3,.3974E-1,.1418E-3,-.1048E-2,-.2982E-3, &-.3396E-4,.131E-1,.1413E-2,-.1373E-3,.2638E-3,-.4171E-1, &-.5932E-3,-.7523E-3,-.6883E-3,-.2355E-1,.5695E-3,-.2219E-4, &-.2301E-1,-.9962E-4,-.6761E-3,.204E-2,-.5479E-3,.2591E-1, &-.2425E-2,.1583E-1,.9577E-2/ DATA (C(3,2,J),J=1,81)/.3367E1,.1038E-1,.1407,.3622E-1,-.3144E-1, &.112E-1,-.5674E-1,.3219E-1,.1288E-2,-.5799E-1,-.4609E-2, &.3252E-2,-.2859E-3,.1226E-1,-.4539E-2,.1310E-2,-.5603E-3, &-.311,-.1268E-2,.1539E-1,.3146E-2,.7787E-2,-.143E-2,-.482E-2 &,.2924E-2,-.9981E-1,-.7838E-2,-.1663E-3,.4769E-3,.4148E-2, &-.1008E-2,-.979E-3,-.9049E-1,-.2994E-2,-.6748E-2,-.9889E-3, &.1488E-2,-.1154E-2,-.8412E-4,-.1302E-1,-.4859E-2,-.7172E-3, &-.9401E-3,.9101E-3,-.1735E-3,.7055E-1,.6398E-2,-.3103E-2, &-.938E-3,-.4E-3,-.1165E-2,.2713E-1,-.1654E-2,.2781E-2, &-.5215E-5,.2258E-3,.5022E-1,.95E-2,.4147E-3,.3499E-3, &-.6097E-3,.4118E-1,.6556E-2,.3793E-2,-.1226E-3,-.2517E-1, &.1491E-3,.1075E-2,.4531E-3,-.9012E-2,.3343E-2,.3431E-2, &-.2519E-1,.3793E-4,.5973E-3,-.1423E-1,-.132E-2,-.6048E-2, &-.5005E-2,-.115E-1,.2574E-1/ DATA (C(4,1,J),J=1,81)/.3574E1,.0,.7537E-1,.0,-.8459E-1, &0.,-.294E-1,0.,.4547E-1,-.5321E-1,0.,.4328E-2,0.,.6022E-2, &.0,-.9168E-3,.0,-.1768,.0,.294E-1,.0,.5902E-3,.0,-.9047E-2, &.0,-.6555E-1,.0,-.1033E-2,.0,.1674E-2,.0,.2802E-3,-.6786E-1 &,.0,.4193E-2,.0,-.6448E-3,.0,.9277E-3,-.1634E-1,.0,-.2531E-2 &,.0,.193E-4,.0,.528E-1,.0,.2438E-2,.0,-.5292E-3,.0,.1555E-1 &,.0,-.3259E-2,.0,-.5998E-3,.3168E-1,.0,.2382E-2,.0,-.4078E-3 &,.2312E-1,.0,.1481E-3,.0,-.1885E-1,.0,.1144E-2,.0,-.9952E-2 &,.0,-.551E-3,-.202E-1,.0,-.7283E-4,-.1272E-1,.0,.2224E-2, &.0,-.251E-2,.2434E-1/ DATA (C(4,2,J),J=1,81)/.3574E1,-.5639E-2,.7094E-1, &-.3347E-1,-.861E-1,-.2877E-1,-.3154E-1,-.2847E-2,.1235E-1, &-.5966E-1,-.3236E-2,.3795E-3,-.8634E-3,.3377E-2,-.1071E-3, &-.2151E-2,-.4057E-3,-.1783,.126E-1,.2835E-1,-.242E-2, &.3002E-2,-.4684E-2,-.6756E-2,-.7493E-3,-.6147E-1,-.5636E-2 &,-.1234E-2,-.1613E-2,-.6353E-4,-.2503E-3,-.1729E-3,-.7148E-1 &,.5326E-2,.4006E-2,.6484E-3,-.1046E-3,-.6034E-3,-.9435E-3, &-.2385E-2,.6853E-2,.151E-2,.1319E-2,.9049E-4,-.1999E-3, &.3976E-1,.2802E-2,-.103E-2,.5599E-3,-.4791E-3,-.846E-4, &.2683E-1,.427E-2,.5911E-3,.2987E-3,-.208E-3,.1396E-1, &-.1922E-2,-.1063E-2,.3803E-3,.1343E-3,.1771E-1,-.1038E-2, &-.4645E-3,-.2481E-3,-.2251E-1,-.29E-2,-.3977E-3,-.516E-3, &-.8079E-2,-.1528E-2,.306E-3,-.1582E-1,-.8536E-3,.1565E-3, &-.1252E-1,.2319E-3,.4311E-2,.1024E-2,.1296E-5,.179E-1/ IF(NS.LT.3) THEN IS=NS ELSE IF(NS.GT.3) THEN IS=2 DIPL=-DIPL ELSE IS=1 ENDIF COLAT=UMR*(90.-DIPL) AZ=.2618*SLT CALL SPHARM(A,8,8,COLAT,AZ) IF(IS.EQ.2) THEN KEND=3 ELSE KEND=4 ENDIF DO 2 K=1,KEND STE=0. DO 1 I=1,81 1 STE=STE+A(I)*C(K,IS,I) 2 TE(K)=10.**STE IF(IS.EQ.2) THEN DIPL=-DIPL COLAT=UMR*(90.-DIPL) CALL SPHARM(A,8,8,COLAT,AZ) STE=0. DO 11 I=1,81 11 STE=STE+A(I)*C(4,2,I) TE(4)=10.**STE ENDIF C---------- TEMPERATURE AT 400KM AT MIDNIGHT AND NOON DO 4 J=1,2 STE=0. AZ=.2618*(J-1)*12. CALL SPHARM(A,8,8,COLAT,AZ) DO 3 I=1,81 3 STE=STE+A(I)*C(2,IS,I) 4 TE(J+4)=10.**STE RETURN END C SUBROUTINE SPHARM(C,L,M,COLAT,AZ) C CALCULATES THE COEFFICIENTS OF THE SPHERICAL HARMONIC C EXPANSION THAT WAS USED FOR THE BRACE-THEIS-MODELS. DIMENSION C(82) C(1)=1. K=2 X=COS(COLAT) C(K)=X K=K+1 DO 10 I=2,L C(K)=((2*I-1)*X*C(K-1)-(I-1)*C(K-2))/I 10 K=K+1 Y=SIN(COLAT) DO 20 MT=1,M CAZ=COS(MT*AZ) SAZ=SIN(MT*AZ) C(K)=Y**MT K=K+1 IF(MT.EQ.L) GOTO 16 C(K)=C(K-1)*X*(2*MT+1) K=K+1 IF((MT+1).EQ.L) GOTO 16 DO 15 I=2+MT,L C(K)=((2*I-1)*X*C(K-1)-(I+MT-1)*C(K-2))/(I-MT) 15 K=K+1 16 N=L-MT+1 DO 18 I=1,N C(K)=C(K-N)*CAZ C(K-N)=C(K-N)*SAZ 18 K=K+1 20 CONTINUE RETURN END C C REAL FUNCTION ELTE(H) c---------------------------------------------------------------- C ELECTRON TEMPERATURE PROFILE BASED ON THE TEMPERATURES AT 120 C HMAX,300,400,600,1400,3000 KM ALTITUDE. INBETWEEN CONSTANT C GRADIENT IS ASSUMED. ARGMAX IS MAXIMUM ARGUMENT ALLOWED FOR C EXP-FUNCTION. c---------------------------------------------------------------- COMMON /BLOTE/AH(7),ATE1,ST(6),D(5) C SUM=ATE1+ST(1)*(H-AH(1)) DO 1 I=1,5 aa = eptr(h ,d(i),ah(i+1)) bb = eptr(ah(1),d(i),ah(i+1)) 1 SUM=SUM+(ST(I+1)-ST(I))*(AA-BB)*D(I) ELTE=SUM RETURN END C C FUNCTION TEDE(H,DEN,COV) C ELECTRON TEMEPERATURE MODEL AFTER BRACE,THEIS . C FOR NEG. COV THE MEAN COV-INDEX (3 SOLAR ROT.) IS EXPECTED. C DEN IS THE ELECTRON DENSITY IN M-3. Y=1051.+(17.01*H-2746.)* &EXP(-5.122E-4*H+(6.094E-12-3.353E-14*H)*DEN) ACOV=ABS(COV) YC=1.+(.117+2.02E-3*ACOV)/(1.+EXP(-(ACOV-102.5)/5.)) IF(COV.LT.0.) &YC=1.+(.123+1.69E-3*ACOV)/(1.+EXP(-(ACOV-115.)/10.)) TEDE=Y*YC RETURN END C C C************************************************************* C**************** ION TEMPERATURE **************************** C************************************************************* C C REAL FUNCTION TI(H) c---------------------------------------------------------------- C ION TEMPERATURE FOR HEIGHTS NOT GREATER 1000 KM AND NOT LESS HS C EXPLANATION SEE FUNCTION RPID. c---------------------------------------------------------------- REAL MM COMMON /BLOCK8/ HS,TNHS,XSM(4),MM(5),G(4),M SUM=MM(1)*(H-HS)+TNHS DO 100 I=1,M-1 aa = eptr(h ,g(i),xsm(i)) bb = eptr(hs,g(i),xsm(i)) 100 SUM=SUM+(MM(I+1)-MM(I))*(AA-BB)*G(I) TI=SUM RETURN END C C REAL FUNCTION TEDER(H) C THIS FUNCTION ALONG WITH PROCEDURE REGFA1 ALLOWS TO FIND C THE HEIGHT ABOVE WHICH TN BEGINS TO BE DIFFERENT FROM TI COMMON /BLOTN/XSM1,TEX,TLBD,SIG TNH = TN(H,TEX,TLBD,SIG) DTDX = DTNDH(H,TEX,TLBD,SIG) TEDER = DTDX * ( XSM1 - H ) + TNH RETURN END C C C************************************************************* C************* ION RELATIVE PRECENTAGE DENSITY ***************** C************************************************************* C C REAL FUNCTION RPID (H, H0, N0, M, ST, ID, XS) c------------------------------------------------------------------ C D.BILITZA,1977,THIS ANALYTIC FUNCTION IS USED TO REPRESENT THE C RELATIVE PRECENTAGE DENSITY OF ATOMAR AND MOLECULAR OXYGEN IONS. C THE M+1 HEIGHT GRADIENTS ST(M+1) ARE CONNECTED WITH EPSTEIN- C STEP-FUNCTIONS AT THE STEP HEIGHTS XS(M) WITH TRANSITION C THICKNESSES ID(M). RPID(H0,H0,N0,....)=N0. C ARGMAX is the highest allowed argument for EXP in your system. c------------------------------------------------------------------ REAL N0 DIMENSION ID(4), ST(5), XS(4) COMMON /ARGEXP/ ARGMAX SUM=(H-H0)*ST(1) DO 100 I=1,M XI=ID(I) aa = eptr(h ,xi,xs(i)) bb = eptr(h0,xi,xs(i)) 100 SUM=SUM+(ST(I+1)-ST(I))*(AA-BB)*XI IF(ABS(SUM).LT.ARGMAX) then SM=EXP(SUM) else IF(SUM.Gt.0.0) then SM=EXP(ARGMAX) else SM=0.0 endif RPID= n0 * SM RETURN END C c SUBROUTINE RDHHE (H,HB,RDOH,RDO2H,RNO,PEHE,RDH,RDHE) C BILITZA,FEB.82,H+ AND HE+ RELATIVE PERECENTAGE DENSITY BELOW C 1000 KM. THE O+ AND O2+ REL. PER. DENSITIES SHOULD BE GIVEN C (RDOH,RDO2H). HB IS THE ALTITUDE OF MAXIMAL O+ DENSITY. PEHE C IS THE PRECENTAGE OF HE+ IONS COMPARED TO ALL LIGHT IONS. C RNO IS THE RATIO OF NO+ TO O2+DENSITY AT H=HB. RDHE=0.0 RDH=0.0 IF(H.LE.HB) GOTO 100 REST=100.0-RDOH-RDO2H-RNO*RDO2H RDH=REST*(1.-PEHE/100.) RDHE=REST*PEHE/100. 100 RETURN END C C REAL FUNCTION RDNO(H,HB,RDO2H,RDOH,RNO) C D.BILITZA, 1978. NO+ RELATIVE PERCENTAGE DENSITY ABOVE 100KM. C FOR MORE INFORMATION SEE SUBROUTINE RDHHE. IF (H.GT.HB) GOTO 200 RDNO=100.0-RDO2H-RDOH RETURN 200 RDNO=RNO*RDO2H RETURN END C C SUBROUTINE KOEFP1(PG1O) C THIEMANN,1979,COEFFICIENTS PG1O FOR CALCULATING O+ PROFILES C BELOW THE F2-MAXIMUM. CHOSEN TO APPROACH DANILOV- C SEMENOV'S COMPILATION. DIMENSION PG1O(80) REAL FELD (80) DATA FELD/-11.0,-11.0,4.0,-11.0,0.08018, &0.13027,0.04216,0.25 ,-0.00686,0.00999, &5.113,0.1 ,170.0,180.0,0.1175,0.15,-11.0, &1.0 ,2.0,-11.0,0.069,0.161,0.254,0.18,0.0161, &0.0216,0.03014,0.1,152.0,167.0,0.04916, &0.17,-11.0,2.0,2.0,-11.0,0.072,0.092,0.014,0.21, &0.01389,0.03863,0.05762,0.12,165.0,168.0,0.008, &0.258,-11.0,1.0,3.0,-11.0,0.091,0.088, &0.008,0.34,0.0067,0.0195,0.04,0.1,158.0,172.0, &0.01,0.24,-11.0,2.0,3.0, -11.0,0.083,0.102, &0.045,0.03,0.00127,0.01,0.05,0.09,167.0,185.0, &0.015,0.18/ K=0 DO 10 I=1,80 K=K+1 10 PG1O(K)=FELD(I) RETURN END C C SUBROUTINE KOEFP2(PG2O) C THIEMANN,1979,COEFFICIENTS FOR CALCULATION OF O+ PROFILES C ABOVE THE F2-MAXIMUM (DUMBS,SPENNER:AEROS-COMPILATION) DIMENSION PG2O(32) REAL FELD(32) DATA FELD/1.0,-11.0,-11.0,1.0,695.0,-.000781, &-.00264,2177.0,1.0,-11.0,-11.0,2.0,570.0, &-.002,-.0052,1040.0,2.0,-11.0,-11.0,1.0,695.0, &-.000786,-.00165,3367.0,2.0,-11.0,-11.0,2.0, &575.0,-.00126,-.00524,1380.0/ K=0 DO 10 I=1,32 K=K+1 10 PG2O(K)=FELD(I) RETURN END C C SUBROUTINE KOEFP3(PG3O) C THIEMANN,1979,COEFFICIENTS FOR CALCULATING O2+ PROFILES. C CHOSEN AS TO APPROACH DANILOV-SEMENOV'S COMPILATION. DIMENSION PG3O(80) REAL FELD(80) DATA FELD/-11.0,1.0,2.0,-11.0,160.0,31.0,130.0, &-10.0,198.0,0.0,0.05922,-0.07983, &-0.00397,0.00085,-0.00313,0.0,-11.0,2.0,2.0,-11.0, &140.0,30.0,130.0,-10.0, &190.0,0.0,0.05107,-0.07964,0.00097,-0.01118,-0.02614, &-0.09537, &-11.0,1.0,3.0,-11.0,140.0,37.0,125.0,0.0,182.0, &0.0,0.0307,-0.04968,-0.00248, &-0.02451,-0.00313,0.0,-11.0,2.0,3.0,-11.0, &140.0,37.0,125.0,0.0,170.0,0.0, &0.02806,-0.04716,0.00066,-0.02763,-0.02247,-0.01919, &-11.0,-11.0,4.0,-11.0,140.0,45.0,136.0,-9.0, &181.0,-26.0,0.02994,-0.04879, &-0.01396,0.00089,-0.09929,0.05589/ K=0 DO 10 I=1,80 K=K+1 10 PG3O(K)=FELD(I) RETURN END C C SUBROUTINE SUFE (FIELD,RFE,M,FE) C SELECTS THE REQUIRED ION DENSITY PARAMETER SET. C THE INPUT FIELD INCLUDES DIFFERENT SETS OF DIMENSION M EACH C CARACTERISED BY 4 HEADER NUMBERS. RFE(4) SHOULD CONTAIN THE C CHOSEN HEADER NUMBERS.FE(M) IS THE CORRESPONDING SET. DIMENSION RFE(4),FE(12),FIELD(80),EFE(4) K=0 100 DO 101 I=1,4 K=K+1 101 EFE(I)=FIELD(K) DO 111 I=1,M K=K+1 111 FE(I)=FIELD(K) DO 120 I=1,4 IF((EFE(I).GT.-10.0).AND.(RFE(I).NE.EFE(I))) GOTO 100 120 CONTINUE RETURN END C C C************************************************************* C************* PEAK VALUES ELECTRON DENSITY ****************** C************************************************************* C C SUBROUTINE F2OUT(XMODIP,XLATI,XLONGI,FF0,XM0,UT, & FOF2,XM3000) C CALCULATES FOF2/MHZ AND M3000 USING THE CCIR-MAPS. C INPUT: MODIFIED DIP LATITUDE XMODIP, GEOG. LATITUDE XLATI, C LONGITUDE XLONGI (ALL IN DEG.), SMOOTHED SUNSPOT NUMBER R, C MONTH AND UNIVERSAL TIME UT (DEC. HOURS). C D.BILITZA,JULY 85. DIMENSION FF0(988),XM0(441) INTEGER QM(7),QF(9) DATA QF/11,11,8,4,1,0,0,0,0/,QM/6,7,5,2,1,0,0/ FOF2=GAMMA1(XMODIP,XLATI,XLONGI,UT,6,QF,9,76,13,988,FF0) XM3000=GAMMA1(XMODIP,XLATI,XLONGI,UT,4,QM,7,49,9,441,XM0) RETURN END C C REAL FUNCTION HMF2ED(XMAGBR,R,X,XM3) C CALCULATES THE PEAK HEIGHT HMF2/KM FOR THE MAGNETIC C LATITUDE XMAGBR/DEG. AND THE SMOOTHED ZUERICH SUNSPOT C NUMBER R USING CCIR-M3000 XM3 AND THE RATIO X=FOF2/FOE. C [REF. D.BILITZA ET AL., TELECOMM.J., 46, 549-553, 1979] C D.BILITZA,1980. F1=(2.32E-3)*R+0.222 F2=1.2-(1.16E-2)*EXP((2.39E-2)*R) F3=0.096*(R-25.0)/150.0 DELM=F1*(1.0-R/150.0*EXP(-XMAGBR*XMAGBR/1600.0))/(X-F2)+F3 HMF2ED=1490.0/(XM3+DELM)-176.0 RETURN END C C REAL FUNCTION FOF1ED(YLATI,R,CHI) c-------------------------------------------------------------- C CALCULATES THE F1 PEAK PLASMA FREQUENCY (FOF1/MHZ) C FOR DIP-LATITUDE (YLATI/DEGREE) c SMOOTHED ZURICH SUNSPOT NUMBER (R) c SOLAR ZENITH ANGLE (CHI/DEGREE) C REFERENCE: c E.D.DUCHARME ET AL., RADIO SCIENCE 6, 369-378, 1971 C AND 8, 837-839, 1973 c HOWEVER WITH MAGNETIC DIP LATITUDE INSTEAD OF GEOMAGNETIC c DIPOLE LATITUDE, EYFRIG, 1979 C--------------------------------------------- D. BILITZA, 1988. COMMON/CONST/UMR FOF1 = 0.0 DLA = YLATI CHI0 = 49.84733 + 0.349504 * DLA CHI100 = 38.96113 + 0.509932 * DLA CHIM = ( CHI0 + ( CHI100 - CHI0 ) * R / 100. ) IF(CHI.GT.CHIM) GOTO 1 F0 = 4.35 + DLA * ( 0.0058 - 1.2E-4 * DLA ) F100 = 5.348 + DLA * ( 0.011 - 2.3E-4 * DLA ) FS = F0 + ( F100 - F0 ) * R / 100.0 XMUE = 0.093 + DLA * ( 0.0046 - 5.4E-5 * DLA ) + 3.0E-4 * R FOF1 = FS * COS( CHI * UMR ) ** XMUE 1 FOF1ED = FOF1 RETURN END C C REAL FUNCTION FOEEDI(COV,XHI,XHIM,XLATI) C------------------------------------------------------- C CALCULATES FOE/MHZ BY THE EDINBURGH-METHOD. C INPUT: MEAN 10.7CM SOLAR RADIO FLUX (COV), GEOGRAPHIC C LATITUDE (XLATI/DEG), SOLAR ZENITH ANGLE (XHI/DEG AND C XHIM/DEG AT NOON). C REFERENCE: C KOURIS-MUGGELETON, CCIR DOC. 6/3/07, 1973 C TROST, J. GEOPHYS. RES. 84, 2736, 1979 (was used C to improve the nighttime varition) C D.BILITZA--------------------------------- AUGUST 1986. COMMON/CONST/UMR C variation with solar activity (factor A) ............... A=1.0+0.0094*(COV-66.0) C variation with noon solar zenith angle (B) and with latitude (C) SL=COS(XLATI*UMR) IF(XLATI.LT.32.0) THEN SM=-1.93+1.92*SL C=23.0+116.0*SL ELSE SM=0.11-0.49*SL C=92.0+35.0*SL ENDIF if(XHIM.ge.90.) XHIM=89.999 B = COS(XHIM*UMR) ** SM C variation with solar zenith angle (D) .......................... IF(XLATI.GT.12.0) THEN SP=1.2 ELSE SP=1.31 ENDIF C adjusted solar zenith angle during nighttime (XHIC) ............. XHIC=XHI-3.*ALOG(1.+EXP((XHI-89.98)/3.)) D=COS(XHIC*UMR)**SP C determine foE**4 ................................................ R4FOE=A*B*C*D C minimum allowable foE (sqrt[SMIN])............................... SMIN=0.121+0.0015*(COV-60.) SMIN=SMIN*SMIN IF(R4FOE.LT.SMIN) R4FOE=SMIN FOEEDI=R4FOE**0.25 RETURN END C C REAL FUNCTION XMDED(XHI,R,YW) C D. BILITZA, 1978, CALCULATES ELECTRON DENSITY OF D MAXIMUM. C XHI/DEG. IS SOLAR ZENITH ANGLE, R SMOOTHED ZURICH SUNSPOT NUMBER C AND YW/M-3 THE ASSUMED CONSTANT NIGHT VALUE. C [REF.: D.BILITZA, WORLD DATA CENTER A REPORT UAG-82,7, C BOULDER,1981] COMMON/CONST/UMR Y=6.05E8+0.088E8*R Z=(-0.1/(ALOG(YW/Y)))**0.3704 if(abs(z).gt.1.) z=sign(1.,z) SUXHI=ACOS(Z) IF (SUXHI.LT.1.0472) SUXHI=1.0472 XXHI=XHI*UMR IF (XXHI.GT.SUXHI) GOTO 100 X=COS(XXHI) XMDED=Y*EXP(-0.1/X**2.7) RETURN 100 XMDED=YW RETURN END C C REAL FUNCTION GAMMA1(SMODIP,SLAT,SLONG,HOUR,IHARM,NQ, & K1,M,MM,M3,SFE) C CALCULATES GAMMA1=FOF2 OR M3000 USING CCIR NUMERICAL MAP C COEFFICIENTS SFE(M3) FOR MODIFIED DIP LATITUDE (SMODIP/DEG) C GEOGRAPHIC LATITUDE (SLAT/DEG) AND LONGITUDE (SLONG/DEG) C AND UNIVERSIAL TIME (HOUR/DECIMAL HOURS). C NQ(K1) IS AN INTEGER ARRAY GIVING THE HIGHEST DEGREES IN C LATITUDE FOR EACH LONGITUDE HARMONIC. C M=1+NQ1+2(NQ2+1)+2(NQ3+1)+... . C SHEIKH,4.3.77. REAL*8 C(12),S(12),COEF(100),SUM DIMENSION NQ(K1),XSINX(13),SFE(M3) COMMON/CONST/UMR HOU=(15.0*HOUR-180.0)*UMR S(1)=SIN(HOU) C(1)=COS(HOU) DO 250 I=2,IHARM C(I)=C(1)*C(I-1)-S(1)*S(I-1) S(I)=C(1)*S(I-1)+S(1)*C(I-1) 250 CONTINUE DO 300 I=1,M MI=(I-1)*MM COEF(I)=SFE(MI+1) DO 300 J=1,IHARM COEF(I)=COEF(I)+SFE(MI+2*J)*S(J)+SFE(MI+2*J+1)*C(J) 300 CONTINUE SUM=COEF(1) SS=SIN(SMODIP*UMR) S3=SS XSINX(1)=1.0 INDEX=NQ(1) DO 350 J=1,INDEX SUM=SUM+COEF(1+J)*SS XSINX(J+1)=SS SS=SS*S3 350 CONTINUE XSINX(NQ(1)+2)=SS NP=NQ(1)+1 SS=COS(SLAT*UMR) S3=SS DO 400 J=2,K1 S0=SLONG*(J-1.)*UMR S1=COS(S0) S2=SIN(S0) INDEX=NQ(J)+1 DO 450 L=1,INDEX NP=NP+1 SUM=SUM+COEF(NP)*XSINX(L)*SS*S1 NP=NP+1 SUM=SUM+COEF(NP)*XSINX(L)*SS*S2 450 CONTINUE SS=SS*S3 400 CONTINUE GAMMA1=SUM RETURN END C C C************************************************************ C*************** EARTH MAGNETIC FIELD *********************** C************************************************************** C C SUBROUTINE GGM(ART,LONG,LATI,MLONG,MLAT) C CALCULATES GEOMAGNETIC LONGITUDE (MLONG) AND LATITUDE (MLAT) C FROM GEOGRAFIC LONGITUDE (LONG) AND LATITUDE (LATI) FOR ART=0 C AND REVERSE FOR ART=1. ALL ANGLES IN DEGREE. C LATITUDE:-90 TO 90. LONGITUDE:0 TO 360 EAST. INTEGER ART REAL MLONG,MLAT,LONG,LATI COMMON/CONST/FAKTOR ZPI=FAKTOR*360. CBG=11.4*FAKTOR CI=COS(CBG) SI=SIN(CBG) IF(ART.EQ.0) GOTO 10 CBM=COS(MLAT*FAKTOR) SBM=SIN(MLAT*FAKTOR) CLM=COS(MLONG*FAKTOR) SLM=SIN(MLONG*FAKTOR) SBG=SBM*CI-CBM*CLM*SI IF(ABS(SBG).GT.1.) SBG=SIGN(1.,SBG) LATI=ASIN(SBG) CBG=COS(LATI) SLG=(CBM*SLM)/CBG CLG=(SBM*SI+CBM*CLM*CI)/CBG IF(ABS(CLG).GT.1.) CLG=SIGN(1.,CLG) LONG=ACOS(CLG) IF(SLG.LT.0.0) LONG=ZPI-LONG LATI=LATI/FAKTOR LONG=LONG/FAKTOR LONG=LONG-69.8 IF(LONG.LT.0.0) LONG=LONG+360.0 RETURN 10 YLG=LONG+69.8 CBG=COS(LATI*FAKTOR) SBG=SIN(LATI*FAKTOR) CLG=COS(YLG*FAKTOR) SLG=SIN(YLG*FAKTOR) SBM=SBG*CI+CBG*CLG*SI IF(ABS(SBM).GT.1.) SBM=SIGN(1.,SBM) MLAT=ASIN(SBM) CBM=COS(MLAT) SLM=(CBG*SLG)/CBM CLM=(-SBG*SI+CBG*CLG*CI)/CBM IF(ABS(CLM).GT.1.) CLM=SIGN(1.,CLM) MLONG=ACOS(CLM) IF(SLM.LT..0) MLONG=ZPI-MLONG MLAT=MLAT/FAKTOR MLONG=MLONG/FAKTOR RETURN END C C SUBROUTINE FIELDG(DLAT,DLONG,ALT,X,Y,Z,F,DIP,DEC,SMODIP) C THIS IS A SPECIAL VERSION OF THE POGO 68/10 MAGNETIC FIELD C LEGENDRE MODEL. TRANSFORMATION COEFF. G(144) VALID FOR 1973. C INPUT: DLAT, DLONG=GEOGRAPHIC COORDINATES/DEG.(-90/90,0/360), C ALT=ALTITUDE/KM. C OUTPUT: F TOTAL FIELD (GAUSS), Z DOWNWARD VERTICAL COMPONENT C X,Y COMPONENTS IN THE EQUATORIAL PLANE (X TO ZERO LONGITUDE). C DIP INCLINATION ANGLE(DEGREE). SMODIP RAWER'S MODFIED DIP. C SHEIK,1977. DIMENSION H(144),XI(3),G(144),FEL1(72),FEL2(72) COMMON/CONST/UMR DATA FEL1/0.0, 0.1506723,0.0101742, -0.0286519, 0.0092606, & -0.0130846, 0.0089594, -0.0136808,-0.0001508, -0.0093977, & 0.0130650, 0.0020520, -0.0121956, -0.0023451, -0.0208555, & 0.0068416,-0.0142659, -0.0093322, -0.0021364, -0.0078910, & 0.0045586, 0.0128904, -0.0002951, -0.0237245,0.0289493, & 0.0074605, -0.0105741, -0.0005116, -0.0105732, -0.0058542, &0.0033268, 0.0078164,0.0211234, 0.0099309, 0.0362792, &-0.0201070,-0.0046350,-0.0058722,0.0011147,-0.0013949, & -0.0108838, 0.0322263, -0.0147390, 0.0031247, 0.0111986, & -0.0109394,0.0058112, 0.2739046, -0.0155682, -0.0253272, & 0.0163782, 0.0205730, 0.0022081, 0.0112749,-0.0098427, & 0.0072705, 0.0195189, -0.0081132, -0.0071889, -0.0579970, & -0.0856642, 0.1884260,-0.7391512, 0.1210288, -0.0241888, & -0.0052464, -0.0096312, -0.0044834, 0.0201764, 0.0258343, &0.0083033, 0.0077187/ DATA FEL2/0.0586055,0.0102236,-0.0396107, & -0.0167860, -0.2019911, -0.5810815,0.0379916, 3.7508268, & 1.8133030, -0.0564250, -0.0557352, 0.1335347, -0.0142641, & -0.1024618,0.0970994, -0.0751830,-0.1274948, 0.0402073, & 0.0386290, 0.1883088, 0.1838960, -0.7848989,0.7591817, & -0.9302389,-0.8560960, 0.6633250, -4.6363869, -13.2599277, & 0.1002136, 0.0855714,-0.0991981, -0.0765378,-0.0455264, & 0.1169326, -0.2604067, 0.1800076, -0.2223685, -0.6347679, &0.5334222, -0.3459502,-0.1573697, 0.8589464, 1.7815990, &-6.3347645, -3.1513653, -9.9927750,13.3327637, -35.4897308, &37.3466339, -0.5257398, 0.0571474, -0.5421217, 0.2404770, & -0.1747774,-0.3433644, 0.4829708,0.3935944, 0.4885033, & 0.8488121, -0.7640999, -1.8884945, 3.2930784,-7.3497229, & 0.1672821,-0.2306652, 10.5782146, 12.6031065, 8.6579742, & 215.5209961, -27.1419220,22.3405762,1108.6394043/ K=0 DO 10 I=1,72 K=K+1 G(K)=FEL1(I) 10 G(72+K)=FEL2(I) RLAT=DLAT*UMR CT=SIN(RLAT) ST=COS(RLAT) NMAX=11 D=SQRT(40680925.0-272336.0*CT*CT) RLONG=DLONG*UMR CP=COS(RLONG) SP=SIN(RLONG) ZZZ=(ALT+40408589.0/D)*CT/6371.2 RHO=(ALT+40680925.0/D)*ST/6371.2 XXX=RHO*CP YYY=RHO*SP RQ=1.0/(XXX*XXX+YYY*YYY+ZZZ*ZZZ) XI(1)=XXX*RQ XI(2)=YYY*RQ XI(3)=ZZZ*RQ IHMAX=NMAX*NMAX+1 LAST=IHMAX+NMAX+NMAX IMAX=NMAX+NMAX-1 DO 100 I=IHMAX,LAST 100 H(I)=G(I) DO 200 K=1,3,2 I=IMAX IH=IHMAX 300 IL=IH-I F1=2./(I-K+2.) X1=XI(1)*F1 Y1=XI(2)*F1 Z1=XI(3)*(F1+F1) I=I-2 IF((I-1).LT.0) GOTO 400 IF((I-1).EQ.0) GOTO 500 DO 600 M=3,I,2 H(IL+M+1)=G(IL+M+1)+Z1*H(IH+M+1)+X1*(H(IH+M+3)-H(IH+M-1))- &Y1*(H(IH+M+2)+H(IH+M-2)) H(IL+M)=G(IL+M)+Z1*H(IH+M)+X1*(H(IH+M+2)-H(IH+M-2))+ &Y1*(H(IH+M+3)+H(IH+M-1)) 600 CONTINUE 500 H(IL+2)=G(IL+2)+Z1*H(IH+2)+X1*H(IH+4)-Y1*(H(IH+3)+H(IH)) H(IL+1)=G(IL+1)+Z1*H(IH+1)+Y1*H(IH+4)+X1*(H(IH+3)-H(IH)) 400 H(IL)=G(IL)+Z1*H(IH)+2.0*(X1*H(IH+1)+Y1*H(IH+2)) 700 IH=IL IF(I.GE.K) GOTO 300 200 CONTINUE S=0.5*H(1)+2.0*(H(2)*XI(3)+H(3)*XI(1)+H(4)*XI(2)) XT=(RQ+RQ)*SQRT(RQ) X=XT*(H(3)-S*XXX) Y=XT*(H(4)-S*YYY) Z=XT*(H(2)-S*ZZZ) F=SQRT(X*X+Y*Y+Z*Z) BRH0=Y*SP+X*CP Y=Y*CP-X*SP X=Z*ST-BRH0*CT Z=-Z*CT-BRH0*ST zdivf=z/f IF(ABS(zdivf).GT.1.) zdivf=SIGN(1.,zdivf) DIP=ASIN(zdivf) ydivs=y/sqrt(x*x+y*y) IF(ABS(ydivs).GT.1.) ydivs=SIGN(1.,ydivs) DEC=ASIN(ydivs) dipdiv=DIP/SQRT(DIP*DIP+ST) IF(ABS(dipdiv).GT.1.) dipdiv=SIGN(1.,dipdiv) SMODIP=ASIN(dipdiv) DIP=DIP/UMR DEC=DEC/UMR SMODIP=SMODIP/UMR RETURN END C C C************************************************************ C*********** INTERPOLATION AND REST *************************** C************************************************************** C C SUBROUTINE REGFA1(X11,X22,FX11,FX22,EPS,FW,F,SCHALT,X) C REGULA-FALSI-PROCEDURE TO FIND X WITH F(X)-FW=0. X1,X2 ARE THE C STARTING VALUES. THE COMUTATION ENDS WHEN THE X-INTERVAL C HAS BECOME LESS THAN EPS . IF SIGN(F(X1)-FW)= SIGN(F(X2)-FW) C THEN SCHALT=.TRUE. LOGICAL L1,LINKS,K,SCHALT SCHALT=.FALSE. EP=EPS X1=X11 X2=X22 F1=FX11-FW F2=FX22-FW K=.FALSE. NG=2 LFD=0 IF(F1*F2.LE.0.0) GOTO 200 X=0.0 SCHALT=.TRUE. RETURN 200 X=(X1*F2-X2*F1)/(F2-F1) GOTO 400 300 L1=LINKS DX=(X2-X1)/NG IF(.NOT.LINKS) DX=DX*(NG-1) X=X1+DX 400 FX=F(X)-FW LFD=LFD+1 IF(LFD.GT.20) THEN EP=EP*10. LFD=0 ENDIF LINKS=(F1*FX.GT.0.0) K=.NOT.K IF(LINKS) THEN X1=X F1=FX ELSE X2=X F2=FX ENDIF IF(ABS(X2-X1).LE.EP) GOTO 800 IF(K) GOTO 300 IF((LINKS.AND.(.NOT.L1)).OR.(.NOT.LINKS.AND.L1)) NG=2*NG GOTO 200 800 RETURN END C C SUBROUTINE TAL(SHABR,SDELTA,SHBR,SDTDH0,AUS6,SPT) C CALCULATES THE COEFFICIENTS SPT FOR THE POLYNOMIAL C Y(X)=1+SPT(1)*X**2+SPT(2)*X**3+SPT(3)*X**4+SPT(4)*X**5 C TO FIT THE VALLEY IN Y, REPRESENTED BY: C Y(X=0)=1, THE X VALUE OF THE DEEPEST VALLEY POINT (SHABR), C THE PRECENTAGE DEPTH (SDELTA), THE WIDTH (SHBR) AND THE C DERIVATIVE DY/DX AT THE UPPER VALLEY BOUNDRY (SDTDH0). C IF THERE IS AN UNWANTED ADDITIONAL EXTREMUM IN THE VALLEY C REGION, THEN AUS6=.TRUE., ELSE AUS6=.FALSE.. C FOR -SDELTA THE COEFF. ARE CALCULATED FOR THE FUNCTION C Y(X)=EXP(SPT(1)*X**2+...+SPT(4)*X**5). DIMENSION SPT(4) LOGICAL AUS6 Z1=-SDELTA/(100.0*SHABR*SHABR) IF(SDELTA.GT.0.) GOTO 500 SDELTA=-SDELTA Z1=ALOG(1.-SDELTA/100.)/(SHABR*SHABR) 500 Z3=SDTDH0/(2.*SHBR) Z4=SHABR-SHBR SPT(4)=2.0*(Z1*(SHBR-2.0*SHABR)*SHBR+Z3*Z4*SHABR)/ & (SHABR*SHBR*Z4*Z4*Z4) SPT(3)=Z1*(2.0*SHBR-3.0*SHABR)/(SHABR*Z4*Z4)- & (2.*SHABR+SHBR)*SPT(4) SPT(2)=-2.0*Z1/SHABR-2.0*SHABR*SPT(3)-3.0*SHABR*SHABR*SPT(4) SPT(1)=Z1-SHABR*(SPT(2)+SHABR*(SPT(3)+SHABR*SPT(4))) AUS6=.FALSE. B=4.*SPT(3)/(5.*SPT(4))+SHABR C=-2.*SPT(1)/(5*SPT(4)*SHABR) Z2=B*B/4.-C IF(Z2.LT.0.0) GOTO 300 Z3=SQRT(Z2) Z1=B/2. Z2=-Z1+Z3 IF(Z2.GT.0.0.AND.Z2.LT.SHBR) AUS6=.TRUE. IF (ABS(Z3).GT.1.E-15) GOTO 400 Z2=C/Z2 IF(Z2.GT.0.0.AND.Z2.LT.SHBR) AUS6=.TRUE. RETURN 400 Z2=-Z1-Z3 IF(Z2.GT.0.0.AND.Z2.LT.SHBR) AUS6=.TRUE. 300 RETURN END C C C****************************************************************** C********** ZENITH ANGLE, DAY OF YEAR, TIME *********************** C****************************************************************** C C subroutine soco (ld,t,flat,Elon, & DECLIN, ZENITH, SUNRSE, SUNSET) c-------------------------------------------------------------------- c s/r to calculate the solar declination, zenith angle, and c sunrise & sunset times - based on Newbern Smith's algorithm c [leo mcnamara, 1-sep-86, last modified 16-jun-87] c {dieter bilitza, 30-oct-89, modified for IRI application} c c in: ld local day of year c t local hour (decimal) c flat northern latitude in degrees c elon east longitude in degrees c c out: declin declination of the sun in degrees c zenith zenith angle of the sun in degrees c sunrse local time of sunrise in hours c sunset local time of sunset in hours c------------------------------------------------------------------- c common/const/ dtr c amplitudes of Fourier coefficients -- 1955 epoch................. data p1,p2,p3,p4,p6 / & 0.017203534,0.034407068,0.051610602,0.068814136,0.103221204 / c c s/r is formulated in terms of WEST longitude....................... wlon = 360. - Elon c c time of equinox for 1980........................................... td = ld + (t + Wlon/15.) / 24. te = td + 0.9369 c c declination of the sun.............................................. dcl = 23.256 * sin(p1*(te-82.242)) + 0.381 * sin(p2*(te-44.855)) & + 0.167 * sin(p3*(te-23.355)) - 0.013 * sin(p4*(te+11.97)) & + 0.011 * sin(p6*(te-10.41)) + 0.339137 DECLIN = dcl dc = dcl * dtr c c the equation of time................................................ tf = te - 0.5 eqt = -7.38*sin(p1*(tf-4.)) - 9.87*sin(p2*(tf+9.)) & + 0.27*sin(p3*(tf-53.)) - 0.2*cos(p4*(tf-17.)) et = eqt * dtr / 4. c fa = flat * dtr phi = 0.26179939 * ( t - 12.) + et c a = sin(fa) * sin(dc) b = cos(fa) * cos(dc) cosx = a + b * cos(phi) if(abs(cosx).gt.1.) cosx=sign(1.,cosx) zenith = acos(cosx) / dtr c c calculate sunrise and sunset times -- at the ground........... c see Explanatory Supplement to the Ephemeris (1961) pg 401...... c sunrise at height h metres is at............................... c chi(h) = 90.83 + 0.0347 * sqrt(h)........................ c this includes corrections for horizontal refraction and........ c semi-diameter of the solar disk................................ ch = cos(90.83 * dtr) cosphi = (ch -a ) / b c if abs(secphi) > 1., sun does not rise/set..................... c allow for sun never setting - high latitude summer............. secphi = 999999. if(cosphi.ne.0.) secphi = 1./cosphi sunset = 99. sunrse = 99. if(secphi.gt.-1.0.and.secphi.le.0.) return c allow for sun never rising - high latitude winter.............. sunset = -99. sunrse = -99. if(secphi.gt.0.0.and.secphi.lt.1.) return c if(cosphi.gt.1.) cosphi=sign(1.,cosphi) phi = acos(cosphi) et = et / 0.26179939 phi = phi / 0.26179939 sunrse = 12. - phi - et sunset = 12. + phi - et if(sunrse.lt.0.) sunrse = sunrse + 24. if(sunset.ge.24.) sunset = sunset - 24. c return end c C FUNCTION HPOL(HOUR,TW,XNW,SA,SU,DSA,DSU) C------------------------------------------------------- C PROCEDURE FOR SMOOTH TIME-INTERPOLATION USING EPSTEIN C STEP FUNCTION AT SUNRISE (SA) AND SUNSET (SU). THE C STEP-WIDTH FOR SUNRISE IS DSA AND FOR SUNSET DSU. C TW,NW ARE THE DAY AND NIGHT VALUE OF THE PARAMETER TO C BE INTERPOLATED. SA AND SU ARE TIME OF SUNRIES AND C SUNSET IN DECIMAL HOURS. C BILITZA----------------------------------------- 1979. IF(ABS(SU).GT.25.) THEN IF(SU.GT.0.0) THEN HPOL=TW ELSE HPOL=XNW ENDIF RETURN ENDIF HPOL=XNW+(TW-XNW)*EPST(HOUR,DSA,SA)+ & (XNW-TW)*EPST(HOUR,DSU,SU) RETURN END C C SUBROUTINE MODA(IN,MONTH,IDAY,IDOY) C------------------------------------------------------------------- C CALCULATES DAY OF YEAR (IDOY) FROM MONTH (MONTH) AND DAY (IDAY) C IF IN=0, OR MONTH (MONTH) AND DAY (IDAY) FROM DAY OF C YEAR (IDOY), IF IN=1. C------------------------------------------------------------------- DIMENSION MO(12) DATA MO/0,31,59,90,120,151,181,212,243,273,304,334/ IMO=0 MOBE=0 IF(IN.GT.0) GOTO 5 IDOY=MO(MONTH)+IDAY RETURN 5 IMO=IMO+1 MOOLD=MOBE IF(IMO.GT.12) GOTO 55 MOBE=MO(IMO) IF(MOBE.LT.IDOY) GOTO 5 55 MONTH=IMO-1 IDAY=IDOY-MOOLD RETURN END c C REAL FUNCTION B0POL ( HOUR, SAX, SUX, ISEASON, R, DELA) C----------------------------------------------------------------- C Interpolation procedure for bottomside thickness parameter B0. C Array B0F(ILT,ISEASON,IR,ILATI) distinguishes between day and C night (ILT=1,2), four seasons (ISEASON=1 spring), low and high C solar activity (IR=1,2), and low and middle modified dip C latitudes (ILATI=1,2). In the DATA statement the first value C corresponds to B0F(1,1,1,1), the second to B0F(2,1,1,1), the C third to B0F(1,2,1,1) and so on. C JUNE 1989 --------------------------------------- Dieter Bilitza C REAL NITVAL DIMENSION B0F(2,4,2,2),SIPH(2),SIPL(2) DATA B0F/114.,64.0,134.,77.0,128.,66.0,75.,73.0, & 113.,115.,150.,116.,138.,123.,94.,132., & 72.0,84.0,83.0,89.0,75.0,85.0,57.,76.0, & 102.,100.,120.,110.,107.,103.,76.,86.0/ DO 7033 ISR=1,2 DO 7034 ISL=1,2 DAYVAL = B0F(1,ISEASON,ISR,ISL) NITVAL = B0F(2,ISEASON,ISR,ISL) C Interpolation day/night with transitions at SAX (sunrise) and SUX (sunset) 7034 SIPH(ISL) = HPOL(HOUR,DAYVAL,NITVAL, & SAX,SUX,1.,1.) C Interpolation low/middle modip with transition at 30 degrees modip 7033 SIPL(ISR) = SIPH(1) + (SIPH(2) - SIPH(1)) / DELA C Interpolation low/high Rz12: linear from 10 to 100 B0POL=SIPL(1)+(SIPL(2)-SIPL(1))/90.*(R-10.) RETURN END c C C ********************************************************************* C ************************ EPSTEIN FUNCTIONS ************************** C ********************************************************************* C REF: H. G. BOOKER, J. ATMOS. TERR. PHYS. 39, 619-623, 1977 C K. RAWER, ADV. SPACE RES. 4, #1, 11-15, 1984 C ********************************************************************* C C REAL FUNCTION RLAY ( X, XM, SC, HX ) C -------------------------------------------------------- RAWER LAYER Y1 = EPTR ( X , SC, HX ) Y1M = EPTR ( XM, SC, HX ) Y2M = EPST ( XM, SC, HX ) RLAY = Y1 - Y1M - ( X - XM ) * Y2M / SC RETURN END C C REAL FUNCTION D1LAY ( X, XM, SC, HX ) C ------------------------------------------------------------ dLAY/dX D1LAY = ( EPST(X,SC,HX) - EPST(XM,SC,HX) ) / SC RETURN END C C REAL FUNCTION D2LAY ( X, XM, SC, HX ) C ---------------------------------------------------------- d2LAY/dX2 D2LAY = EPLA(X,SC,HX) / (SC * SC) RETURN END C C REAL FUNCTION EPTR ( X, SC, HX ) C ------------------------------------------------------------ TRANSITION COMMON/ARGEXP/ARGMAX D1 = ( X - HX ) / SC IF (ABS(D1).LT.ARGMAX) GOTO 1 IF (D1.GT.0.0) THEN EPTR = D1 ELSE EPTR = 0.0 ENDIF RETURN 1 EPTR = ALOG ( 1. + EXP( D1 )) RETURN END C C REAL FUNCTION EPST ( X, SC, HX ) C -------------------------------------------------------------- STEP COMMON/ARGEXP/ARGMAX D1 = ( X - HX ) / SC IF (ABS(D1).LT.ARGMAX) GOTO 1 IF (D1.GT.0.0) THEN EPST = 1. ELSE EPST = 0. ENDIF RETURN 1 EPST = 1. / ( 1. + EXP( -D1 )) RETURN END C C REAL FUNCTION EPSTEP ( Y2, Y1, SC, HX, X) C---------------------------------------------- STEP FROM Y1 TO Y2 EPSTEP = Y1 + ( Y2 - Y1 ) * EPST ( X, SC, HX) RETURN END C C REAL FUNCTION EPLA ( X, SC, HX ) C ------------------------------------------------------------ PEAK COMMON/ARGEXP/ARGMAX D1 = ( X - HX ) / SC IF (ABS(D1).LT.ARGMAX) GOTO 1 EPLA = 0 RETURN 1 D0 = EXP ( D1 ) D2 = 1. + D0 EPLA = D0 / ( D2 * D2 ) RETURN END c c FUNCTION XE2TO5(H,HMF2,NL,HX,SC,AMP) C---------------------------------------------------------------------- C NORMALIZED ELECTRON DENSITY (N/NMF2) FOR THE MIDDLE IONOSPHERE FROM C HME TO HMF2 USING LAY-FUNCTIONS. C---------------------------------------------------------------------- DIMENSION HX(NL),SC(NL),AMP(NL) SUM = 1.0 DO 1 I=1,NL YLAY = AMP(I) * RLAY( H, HMF2, SC(I), HX(I) ) zlay=10.**ylay 1 sum=sum*zlay XE2TO5 = sum RETURN END C C REAL FUNCTION XEN(H,HMF2,XNMF2,HME,NL,HX,SC,AMP) C---------------------------------------------------------------------- C ELECTRON DENSITY WITH NEW MIDDLE IONOSPHERE C---------------------------------------------------------------------- DIMENSION HX(NL),SC(NL),AMP(NL) C IF(H.LT.HMF2) GOTO 100 XEN = XE1(H) RETURN 100 IF(H.LT.HME) GOTO 200 XEN = XNMF2 * XE2TO5(H,HMF2,NL,HX,SC,AMP) RETURN 200 XEN = XE6(H) RETURN END C C SUBROUTINE VALGUL(XHI,HVB,VWU,VWA,VDP) C --------------------------------------------------------------------- C CALCULATES E-F VALLEY PARAMETERS; T.L. GULYAEVA, ADVANCES IN C SPACE RESEARCH 7, #6, 39-48, 1987. C C INPUT: XHI SOLAR ZENITH ANGLE [DEGREE] C C OUTPUT: VDP VALLEY DEPTH (NVB/NME) C VWU VALLEY WIDTH [KM] C VWA VALLEY WIDTH (SMALLER, CORRECTED BY RAWER) C HVB HEIGHT OF VALLEY BASE [KM] C ----------------------------------------------------------------------- C COMMON /CONST/UMR C CS = 0.1 + COS(UMR*XHI) ABC = ABS(CS) VDP = 0.45 * CS / (0.1 + ABC ) + 0.55 ARL = ( 0.1 + ABC + CS ) / ( 0.1 + ABC - CS) ZZZ = ALOG( ARL ) VWU = 45. - 10. * ZZZ VWA = 45. - 5. * ZZZ HVB = 1000. / ( 7.024 + 0.224 * CS + 0.966 * ABC ) RETURN END C C SUBROUTINE ROGUL(IDAY,XHI,SX,GRO) C --------------------------------------------------------------------- C CALCULATES RATIO H0.5/HMF2 FOR HALF-DENSITY POINT (NE(H0.5)=0.5*NMF2) C T.L. GULYAEVA, ADVANCES IN SPACE RESEARCH 7, #6, 39-48, 1987. C C INPUT: IDAY DAY OF YEAR C XHI SOLAR ZENITH ANGLE [DEGREE] C C OUTPUT: GRO RATIO OF HALF DENSITY HEIGHT TO F PEAK HEIGHT C SX SMOOTHLY VARYING SEASON PARAMTER (SX=1 FOR C DAY=1; SX=3 FOR DAY=180; SX=2 FOR EQUINOX) C ----------------------------------------------------------------------- C SX = 2. - COS ( IDAY * 0.017214206 ) XS = ( XHI - 20. * SX) / 15. GRO = 0.8 - 0.2 / ( 1. + EXP(XS) ) c same as gro=0.6+0.2/(1+exp(-xs)) RETURN END C C SUBROUTINE LNGLSN ( N, A, B, AUS) C -------------------------------------------------------------------- C SOLVES QUADRATIC SYSTEM OF LINEAR EQUATIONS: C C INPUT: N NUMBER OF EQUATIONS (= NUMBER OF UNKNOWNS) C A(N,N) MATRIX (LEFT SIDE OF SYSTEM OF EQUATIONS) C B(N) VECTOR (RIGHT SIDE OF SYSTEM) C C OUTPUT: AUS =.TRUE. NO SOLUTION FOUND C =.FALSE. SOLUTION IS IN A(N,J) FOR J=1,N C -------------------------------------------------------------------- C DIMENSION A(5,5), B(5), AZV(10) LOGICAL AUS C NN = N - 1 AUS = .FALSE. DO 1 K=1,N-1 IMAX = K L = K IZG = 0 AMAX = ABS( A(K,K) ) 110 L = L + 1 IF (L.GT.N) GOTO 111 HSP = ABS( A(L,K) ) IF (HSP.LT.1.E-8) IZG = IZG + 1 IF (HSP.LE.AMAX) GOTO 110 111 IF (ABS(AMAX).GE.1.E-10) GOTO 133 AUS = .TRUE. RETURN 133 IF (IMAX.EQ.K) GOTO 112 DO 2 L=K,N AZV(L+1) = A(IMAX,L) A(IMAX,L) = A(K,L) 2 A(K,L) = AZV(L+1) AZV(1) = B(IMAX) B(IMAX) = B(K) B(K) = AZV(1) 112 IF (IZG.EQ.(N-K)) GOTO 1 AMAX = 1. / A(K,K) AZV(1) = B(K) * AMAX DO 3 M=K+1,N 3 AZV(M+1) = A(K,M) * AMAX DO 4 L=K+1,N AMAX = A(L,K) IF (ABS(AMAX).LT.1.E-8) GOTO 4 A(L,K) = 0.0 B(L) = B(L) - AZV(1) * AMAX DO 5 M=K+1,N 5 A(L,M) = A(L,M) - AMAX * AZV(M+1) 4 CONTINUE 1 CONTINUE DO 6 K=N,1,-1 AMAX = 0.0 IF (K.LT.N) THEN DO 7 L=K+1,N 7 AMAX = AMAX + A(K,L) * A(N,L) ENDIF IF (ABS(A(K,K)).LT.1.E-6) THEN A(N,K) = 0.0 ELSE A(N,K) = ( B(K) - AMAX ) / A(K,K) ENDIF 6 CONTINUE RETURN END C C SUBROUTINE LSKNM ( N, M, M0, M1, HM, SC, HX, W, X, Y, VAR, SING) C -------------------------------------------------------------------- C DETERMINES LAY-FUNCTIONS AMPLITUDES FOR A NUMBER OF CONSTRAINTS: C C INPUT: N NUMBER OF AMPLITUDES ( LAY-FUNCTIONS) C M NUMBER OF CONSTRAINTS C M0 NUMBER OF POINT CONSTRAINTS C M1 NUMBER OF FIRST DERIVATIVE CONSTRAINTS C HM F PEAK ALTITUDE [KM] C SC(N) SCALE PARAMETERS FOR LAY-FUNCTIONS [KM] C HX(N) HEIGHT PARAMETERS FOR LAY-FUNCTIONS [KM] C W(M) WEIGHT OF CONSTRAINTS C X(M) ALTITUDES FOR CONSTRAINTS [KM] C Y(M) LOG(DENSITY/NMF2) FOR CONSTRAINTS C C OUTPUT: VAR(M) AMPLITUDES C SING =.TRUE. NO SOLUTION C ------------------------------------------------------------------------ C LOGICAL SING DIMENSION VAR(N), HX(N), SC(N), W(M), X(M), Y(M), & BLI(5), ALI(5,5), XLI(5,10) C M01=M0+M1 SCM=0 DO 1 J=1,5 BLI(J) = 0. DO 1 I=1,5 1 ALI(J,I) = 0. DO 2 I=1,N DO 3 K=1,M0 3 XLI(I,K) = RLAY( X(K), HM, SC(I), HX(I) ) DO 4 K=M0+1,M01 4 XLI(I,K) = D1LAY( X(K), HM, SC(I), HX(I) ) DO 5 K=M01+1,M 5 XLI(I,K) = D2LAY( X(K), HM, SC(I), HX(I) ) 2 CONTINUE DO 7 J=1,N DO 6 K=1,M BLI(J) = BLI(J) + W(K) * Y(K) * XLI(J,K) DO 6 I=1,N 6 ALI(J,I) = ALI(J,I) + W(K) * XLI(I,K) & * XLI(J,K) 7 CONTINUE CALL LNGLSN( N, ALI, BLI, SING ) IF (.NOT.SING) THEN DO 8 I=1,N 8 VAR(I) = ALI(N,I) ENDIF RETURN END C C SUBROUTINE INILAY(NIGHT,XNMF2,XNMF1,XNME,VNE,HMF2,HMF1, & HME,HV1,HV2,HHALF,HXL,SCL,AMP,IQUAL) C------------------------------------------------------------------- C CALCULATES AMPLITUDES FOR LAY FUNCTIONS C D. BILITZA, DECEMBER 1988 C C INPUT: NIGHT LOGICAL VARIABLE FOR DAY/NIGHT DISTINCTION C XNMF2 F2 PEAK ELECTRON DENSITY [M-3] C XNMF1 F1 PEAK ELECTRON DENSITY [M-3] C XNME E PEAK ELECTRON DENSITY [M-3] C VNE ELECTRON DENSITY AT VALLEY BASE [M-3] C HMF2 F2 PEAK ALTITUDE [KM] C HMF1 F1 PEAK ALTITUDE [KM] C HME E PEAK ALTITUDE [KM] C HV1 ALTITUDE OF VALLEY TOP [KM] C HV2 ALTITUDE OF VALLEY BASE [KM] C HHALF ALTITUDE OF HALF-F2-PEAK-DENSITY [KM] C C OUTPUT: HXL(4) HEIGHT PARAMETERS FOR LAY FUNCTIONS [KM] C SCL(4) SCALE PARAMETERS FOR LAY FUNCTIONS [KM] C AMP(4) AMPLITUDES FOR LAY FUNCTIONS C IQUAL =0 ok, =1 ok using second choice for HXL(1) C =2 NO SOLUTION C--------------------------------------------------------------- DIMENSION XX(8),YY(8),WW(8),AMP(4),HXL(4),SCL(4) LOGICAL SSIN,NIGHT c c constants -------------------------------------------------------- NUMLAY=4 NC1 = 2 ALG102=ALOG10(2.) c c constraints: xx == height yy == log(Ne/NmF2) ww == weights c ----------------------------------------------------------------- ALOGF = ALOG10(XNMF2) ALOGEF = ALOG10(XNME) - ALOGF XHALF=XNMF2/2. XX(1) = HHALF XX(2) = HV1 XX(3) = HV2 XX(4) = HME XX(5) = HME - ( HV2 - HME ) YY(1) = -ALG102 YY(2) = ALOGEF YY(3) = ALOG10(VNE) - ALOGF YY(4) = ALOGEF YY(5) = YY(3) YY(7) = 0.0 WW(2) = 1. WW(3) = 2. WW(4) = 5. c c geometric paramters for LAY ------------------------------------- c difference to earlier version: HXL(3) = HV2 + SCL(3) c SCL0 = 0.7 * ( 0.216 * ( HMF2 - HHALF ) + 56.8 ) SCL(1) = 0.8 * SCL0 SCL(2) = 10. SCL(3) = 9. SCL(4) = 6. HXL(3) = HV2 c C DAY CONDITION-------------------------------------------------- c earlier tested: HXL(2) = HMF1 + SCL(2) c IF(NIGHT) GOTO 7711 NUMCON = 8 HXL(1) = 0.9 * HMF2 HXL1T = HHALF HXL(2) = HMF1 HXL(4) = HME - SCL(4) XX(6) = HMF1 XX(7) = HV2 XX(8) = HME YY(8) = 0.0 WW(5) = 1. WW(7) = 50. WW(8) = 500. c without F-region ---------------------------------------------- IF(XNMF1.GT.0) GOTO 100 HXL(2)=(HMF2+HHALF)/2. YY(6) = 0. WW(6) = 0. WW(1) = 1. GOTO 7722 c with F-region -------------------------------------------- 100 YY(6) = ALOG10(XNMF1) - ALOGF WW(6) = 3. IF((XNMF1-XHALF)*(HMF1-HHALF).LT.0.0) THEN WW(1)=0.5 ELSE ZET = YY(1) - YY(6) WW(1) = EPST( ZET, 0.1, 0.15) ENDIF IF(HHALF.GT.HMF1) THEN HFFF=HMF1 XFFF=XNMF1 ELSE HFFF=HHALF XFFF=XHALF ENDIF GOTO 7722 c C NIGHT CONDITION--------------------------------------------------- c different HXL,SCL values were tested including: c SCL(1) = HMF2 * 0.15 - 27.1 HXL(2) = 200. c HXL(2) = HMF1 + SCL(2) HXL(3) = 140. c SCL(3) = 5. HXL(4) = HME + SCL(4) c HXL(4) = 105. c 7711 NUMCON = 7 HXL(1) = HHALF HXL1T = 0.4 * HMF2 + 30. HXL(2) = ( HMF2 + HV1 ) / 2. HXL(4) = HME XX(6) = HV2 XX(7) = HME YY(6) = 0.0 WW(1) = 1. WW(3) = 3. WW(5) = 0.5 WW(6) = 50. WW(7) = 500. HFFF=HHALF XFFF=XHALF c C are valley-top and bottomside point compatible ? ------------- C 7722 IF((HV1-HFFF)*(XNME-XFFF).LT.0.0) WW(2)=0.5 IF(HV1.LE.HV2+5.0) WW(2)=0.5 c C DETERMINE AMPLITUDES----------------------------------------- C NC0=NUMCON-NC1 IQUAL=0 2299 CALL LSKNM(NUMLAY,NUMCON,NC0,NC1,HMF2,SCL,HXL,WW,XX,YY, & AMP,SSIN) IF(IQUAL.gt.0) GOTO 1937 IF((ABS(AMP(1)).GT.10.0).OR.(SSIN)) THEN IQUAL=1 HXL(1)=HXL1T GOTO 2299 ENDIF 1937 IF(SSIN) IQUAL=2 RETURN END c c subroutine ioncom(h,z,f,fs,t,cn) c--------------------------------------------------------------- c ion composition model c A.D. Danilov and A.P. Yaichnikov, A New Model of the Ion c Composition at 75 to 1000 km for IRI, Adv. Space Res. 5, #7, c 75-79, 107-108, 1985 c c h altitude in km c z solar zenith angle in radians c f latitude in radians c fs 10.7cm solar radio flux c t season (month) c cn(1) O+ relative density in percent c cn(2) H+ relative density in percent c cn(3) N+ relative density in percent c cn(4) He+ relative density in percent c cn(5) NO+ relative density in percent c cn(6) O2+ relative density in percent c cn(7) cluster ions relative density in percent c--------------------------------------------------------------- c dimension cn(7),cm(7),hm(7),alh(7),all(7),beth(7), & betl(7),p(5,6,7),var(6),po(5,6),ph(5,6), & pn(5,6),phe(5,6),pno(5,6),po2(5,6),pcl(5,6) data po/4*0.,98.5,4*0.,320.,4*0.,-2.59E-4,2.79E-4,-3.33E-3, & -3.52E-3,-5.16E-3,-2.47E-2,4*0.,-2.5E-6,1.04E-3, & -1.79E-4,-4.29E-5,1.01E-5,-1.27E-3/ data ph/-4.97E-7,-1.21E-1,-1.31E-1,0.,98.1,355.,-191., & -127.,0.,2040.,4*0.,-4.79E-6,-2.E-4,5.67E-4, & 2.6E-4,0.,-5.08E-3,10*0./ data pn/7.6E-1,-5.62,-4.99,0.,5.79,83.,-369.,-324.,0.,593., & 4*0.,-6.3E-5,-6.74E-3,-7.93E-3,-4.65E-3,0.,-3.26E-3, & 4*0.,-1.17E-5,4.88E-3,-1.31E-3,-7.03E-4,0.,-2.38E-3/ data phe/-8.95E-1,6.1,5.39,0.,8.01,4*0.,1200.,4*0.,-1.04E-5, & 1.9E-3,9.53E-4,1.06E-3,0.,-3.44E-3,10*0./ data pno/-22.4,17.7,-13.4,-4.88,62.3,32.7,0.,19.8,2.07,115., & 5*0.,3.94E-3,0.,2.48E-3,2.15E-4,6.67E-3,5*0., & -8.4E-3,0.,-3.64E-3,2.E-3,-2.59E-2/ data po2/8.,-12.2,9.9,5.8,53.4,-25.2,0.,-28.5,-6.72,120., & 5*0.,-1.4E-2,0.,-9.3E-3,3.3E-3,2.8E-2,5*0.,4.25E-3, & 0.,-6.04E-3,3.85E-3,-3.64E-2/ data pcl/4*0.,100.,4*0.,75.,10*0.,4*0.,-9.04E-3,-7.28E-3, & 2*0.,3.46E-3,-2.11E-2/ DO 8 I=1,5 DO 8 J=1,6 p(i,j,1)=po(i,j) p(i,j,2)=ph(i,j) p(i,j,3)=pn(i,j) p(i,j,4)=phe(i,j) p(i,j,5)=pno(i,j) p(i,j,6)=po2(i,j) p(i,j,7)=pcl(i,j) 8 continue s=0. do 5 i=1,7 do 7 j=1,6 var(j) = p(1,j,i)*cos(z) + p(2,j,i)*cos(f) + & p(3,j,i)*cos(0.013*(300.-fs)) + & p(4,j,i)*cos(0.52*(t-6.)) + p(5,j,i) 7 continue cm(i) = var(1) hm(i) = var(2) all(i) = var(3) betl(i)= var(4) alh(i) = var(5) beth(i)= var(6) hx=h-hm(i) if(hx) 1,2,3 1 cn(i) = cm(i) * exp( hx * (hx * all(i) + betl(i)) ) goto 4 2 cn(i) = cm(i) goto 4 3 cn(i) = cm(i) * exp( hx * (hx * alh(i) + beth(i)) ) 4 continue if(cn(i).LT.0.005*cm(i)) cn(i)=0. if(cn(i).GT.cm(i)) cn(i)=cm(i) s=s+cn(i) 5 continue do 6 i=1,7 6 cn(i)=cn(i)/s*100. return end C C C C SUBROUTINE CIRA86(IDAY,SEC,GLAT,GLONG,STL,F107A,TINF,TLB,SIGMA) C******************************************************************* C Calculates neutral temperature parameters for IRI using the C MSIS-86/CIRA 1986 Neutral Thermosphere Model. The subroutines C GTS5, GLOBE5 and GLOBL5 developed by A.E. Hedin (2/26/87) were C modified for use in IRI --------- D. Bilitza -------- March 1991 C C INPUT: C IDAY - DAY OF YEAR C SEC - UT(SEC) C GLAT - GEODETIC LATITUDE(DEG) C GLONG - GEODETIC LONGITUDE(DEG) C STL - LOCAL APPARENT SOLAR TIME(HRS) C F107A - 3 MONTH AVERAGE OF F10.7 FLUX C C OUTPUT: C TINF - EXOSPHERIC TEMPERATURE (K) C TLB - TEMPERATURE AT LOWER BOUNDARY (K) C SIGMA - SHAPE PARAMETER FOR TEMPERATURE PROFILE C C ********************************************************************** DIMENSION PLG(9,4) DATA DR,DR2/1.72142E-2,0.0344284/,HR/.2618/,SR/7.2722E-5/, $ XL/1000./,TLL/1000./,DGTR/1.74533E-2/ save plg, c, s, c2, c4, s2, $ stloc, ctloc, s2tloc, c2tloc, s3tloc, c3tloc C C CALCULATE LEGENDRE POLYNOMIALS C IF(XL.EQ.GLAT) GO TO 15 C = SIN(GLAT*DGTR) S = COS(GLAT*DGTR) C2 = C*C C4 = C2*C2 S2 = S*S PLG(2,1) = C PLG(3,1) = 0.5*(3.*C2 -1.) PLG(4,1) = 0.5*(5.*C*C2-3.*C) PLG(5,1) = (35.*C4 - 30.*C2 + 3.)/8. PLG(6,1) = (63.*C2*C2*C - 70.*C2*C + 15.*C)/8. PLG(2,2) = S PLG(3,2) = 3.*C*S PLG(4,2) = 1.5*(5.*C2-1.)*S PLG(5,2) = 2.5*(7.*C2*C-3.*C)*S PLG(6,2) = 1.875*(21.*C4 - 14.*C2 +1.)*S PLG(7,2) = (11.*C*PLG(6,2)-6.*PLG(5,2))/5. PLG(3,3) = 3.*S2 PLG(4,3) = 15.*S2*C PLG(5,3) = 7.5*(7.*C2 -1.)*S2 PLG(6,3) = 3.*C*PLG(5,3)-2.*PLG(4,3) PLG(4,4) = 15.*S2*S PLG(5,4) = 105.*S2*S*C PLG(6,4)=(9.*C*PLG(5,4)-7.*PLG(4,4))/2. PLG(7,4)=(11.*C*PLG(6,4)-8.*PLG(5,4))/3. XL=GLAT 15 CONTINUE IF(TLL.EQ.STL) GO TO 16 STLOC = SIN(HR*STL) CTLOC = COS(HR*STL) S2TLOC = SIN(2.*HR*STL) C2TLOC = COS(2.*HR*STL) S3TLOC = SIN(3.*HR*STL) C3TLOC = COS(3.*HR*STL) TLL = STL 16 CONTINUE C DFA=F107A-150. C C EXOSPHERIC TEMPERATURE C C F10.7 EFFECT T1 = ( 3.11701E-3 - 0.64111E-5 * DFA ) * DFA F1 = 1. + 0.426385E-2 * DFA F2 = 1. + 0.511819E-2 * DFA F3 = 1. + 0.292246E-2 * DFA C TIME INDEPENDENT T2 = 0.385528E-1 * PLG(3,1) + 0.303445E-2 * PLG(5,1) C SYMMETRICAL ANNUAL AND SEMIANNUAL CD14 = COS( DR * (IDAY+8.45398) ) CD18 = COS( DR2 * (IDAY-125.818) ) CD32 = COS( DR * (IDAY-30.0150) ) CD39 = COS( DR2 * (IDAY-2.75905) ) T3 = 0.805486E-2 * CD32 + 0.14237E-1 * CD18 C ASYMMETRICAL ANNUAL AND SEMIANNUAL T5 = F1 * (-0.127371 * PLG(2,1) - 0.302449E-1 * PLG(4,1) ) * CD14 & - 0.192645E-1 * PLG(2,1) * CD39 C DIURNAL T71 = 0.123512E-1 * PLG(3,2) * CD14 T72 = -0.526277E-2 * PLG(3,2) * CD14 T7 = ( -0.105531 *PLG(2,2) - 0.607134E-2 *PLG(4,2) + T71 ) *CTLOC 4 + ( -0.115622 *PLG(2,2) + 0.202240E-2 *PLG(4,2) + T72 ) *STLOC C SEMIDIURNAL T81 = 0.386578E-2 * PLG(4,3) * CD14 T82 = 0.389146E-2 * PLG(4,3) * CD14 T8= (-0.516278E-3 *PLG(3,3) - 0.117388E-2 *PLG(5,3) +T81)*C2TLOC 3 +( 0.990156E-2 *PLG(3,3) - 0.354589E-3 *PLG(5,3) +T82)*S2TLOC C TERDIURNAL Z1 = PLG(5,4) * CD14 Z2 = PLG(7,4) * CD14 T14=(0.147284E-2*PLG(4,4)-0.173933E-3*Z1+0.365016E-4*Z2)*S3TLOC 2 +(0.341345E-3*PLG(4,4)-0.153218E-3*Z1+0.115102E-3*Z2)*C3TLOC T7814 = F2 * ( T7 + T8 + T14 ) C LONGITUDINAL T11= F3 * (( 0.562606E-2 * PLG(3,2) + 0.594053E-2 * PLG(5,2) + $ 0.109358E-2 * PLG(7,2) - 0.301801E-2 * PLG(2,2) - $ 0.423564E-2 * PLG(4,2) - 0.248289E-2 * PLG(6,2) + $ (0.189689E-2 * PLG(2,2) + 0.415654E-2 * PLG(4,2)) * CD14 $ ) * COS(DGTR*GLONG) + $ ( -0.11654E-1 * PLG(3,2) - 0.449173E-2 * PLG(5,2) - $ 0.353189E-3 * PLG(7,2) + 0.919286E-3 * PLG(2,2) + $ 0.216372E-2 * PLG(4,2) + 0.863968E-3 * PLG(6,2) + $ (0.118068E-1 * PLG(2,2) + 0.331190E-2 * PLG(4,2)) * CD14 $ ) * SIN(DGTR*GLONG) ) C UT AND MIXED UT,LONGITUDE T12 = ( 1. - 0.565411 * PLG(2,1) ) * COS( SR*(SEC-31137.0) ) * $ (-0.13341E-1*PLG(2,1)-0.243409E-1*PLG(4,1)-0.135688E-1*PLG(6,1)) $ + ( 0.845583E-3 * PLG(4,3) + 0.538706E-3 * PLG(6,3) ) * $ COS( SR * (SEC-247.956) + 2.*DGTR*GLONG ) C Exospheric temperature TINF/K [Eq. A7] TINF = 1041.3 * ( 1. + T1+T2+T3+T5+T7814+T11+T12 ) * 0.99604 C C TEMPERATURE DERIVATIVE AT LOWER BOUNDARY C C F10.7 EFFECT T1 = 0.252317E-2 * DFA C TIME INDEPENDENT T2 = -0.467542E-1 * PLG(3,1) + 0.12026 * PLG(5,1) C ASYMMETRICAL ANNUAL CD14 = COS( DR * (IDAY+8.45398) ) T5 = -0.13324 * PLG(2,1) * CD14 C SEMIDIURNAL ZZ = PLG(4,3) * CD14 T81 = -0.973404E-2 * ZZ T82 = -0.718482E-3 * ZZ T8 =(0.191357E-1 *PLG(3,3) + 0.787683E-2 *PLG(5,3) + T81) *C2TLOC 3 + (0.125429E-2 *PLG(3,3) - 0.233698E-2 *PLG(5,3) + T82) *S2TLOC C dTn/dh at lower boundary [Eq. A6] G0 = 0.166728E2 * ( 1. + T1+T2+T5+T8 ) * 0.951363 C C NEUTRAL TEMPERATURE AT LOWER BOUNDARY 120KM C CD9 = COS( DR2 * (IDAY-89.3820) ) CD11 = COS( DR * (IDAY+8.45398) ) T1 = 0.568478E-3 * DFA T4 = 0.107674E-1 * CD9 T5 =-0.192414E-1 * PLG(2,1) * CD11 T7 = -0.2002E-1 *PLG(2,2) *CTLOC - 0.195833E-2 *PLG(2,2) *STLOC T8 = (-0.938391E-2 * PLG(3,3) - 0.260147E-2 * PLG(5,3) $ + 0.511651E-4 * PLG(6,3) * CD11 ) * C2TLOC $ + ( 0.131480E-1 * PLG(3,3) - 0.808556E-3 * PLG(5,3) $ + 0.255717E-2 * PLG(6,3) * CD11 ) * S2TLOC C Tn at lower boundary 120km [Eq. A8] TLB = 386.0 * ( 1. + T1+T4+T5+T7+T8 ) * 0.976619 C Sigma [Eq. A5] SIGMA = G0 / ( TINF - TLB ) RETURN END C C FUNCTION TN(H,TINF,TLBD,S) C-------------------------------------------------------------------- C Calculate Temperature for MSIS/CIRA-86 model C-------------------------------------------------------------------- ZG2 = ( H - 120. ) * 6476.77 / ( 6356.77 + H ) TN = TINF - TLBD * EXP ( - S * ZG2 ) RETURN END C C FUNCTION DTNDH(H,TINF,TLBD,S) C--------------------------------------------------------------------- ZG1 = 6356.77 + H ZG2 = 6476.77 / ZG1 ZG3 = ( H - 120. ) * ZG2 DTNDH = - TLBD * EXP ( - S * ZG3 ) * ( S / ZG1 * ( ZG3 - ZG2 ) ) RETURN END