**********************Mauna Loa Solar Observatory*********************** OBSERVING HOURS These are defined as the time between the first and the last useful coronal scans made with the MkIII K-coronameter. This instrument levies very stringent requirements on the condition of the sky so is the most sensitive to the weather. Unless otherwise stated, it may be assumed that the H alpha observations made with the prominence monitor will be available for the same hours as the coronal data, or perhaps even longer. Note that the MLSO oberving day begins about 17:00 UT and can end as late as 03:30 UT the "next" day. Typical observing times are 17:30 UT to 23:00 UT. The format of this file is undergoing evaluation and may not be final FOR YEAR 1995: Day of Begin End Year (UT) (UT) 1 17.56 21.59 2 17.51 23.21 3 17.41 21.14 Enhancement PA 100, 19:33 UT, Depletion PA 260, 19:36 UT 4 17.41 21.30 5 17.54 21.50 6 ----- ----- 7 ----- ----- 8 17.57 22.01 9 17.51 23.05 10 17.40 22.51 11 17.46 21.06 12 17.45 22.12 13 17.56 23.28 14 18.00 23.42 15 ----- ----- 16 ----- ----- 17 17.47 23.20 18 17.44 23.47 Channel 0 alignment work begun. 19 17.50 22.15 Few images available -- alignment work continuing. 20 18.14 23.49 dPmon vignetting adjusted. *** Alignment hurt MK3 quality! *** 21 17.49 23.26 *** Alignment errors in MK3! 22 17.50 22.01 Possible small CME at PA 300 between 1757 and 1832 UT. 23 17.51 23.02 CME at pa 95, at ~19:00 *** Alignment errors in MK3! 24 17.46 23.55 *** Alignment errors in MK3! 25 17.46 22.00 *** Alignment errors in MK3! 26 17.48 22.01 *** Alignment errors in MK3! 27 17.56 22.54 dPmon vignetting adjusted. 28 17.45 23.35 *** Alignment errors in MK3! 29 17.42 23.16 Possible CME at PA 130-140 between 2040-2306 UT 30 17.48 23.51 *** Alignment errors in MK3! 31 17.46 21.04 *** Alignment errors in MK3! 32 17.44 19.16 *** Alignment errors in MK3! 33 ----- ----- 34 18.07 22.57 35 17.50 22.27 36 ----- ----- 37 17.52 22.16 38 17.36 23.03 39 ----- ----- 40 17.35 23.02 41 17.58 22.27 42 17.36 23.07 43 17.35 23.02 Subtle coronal activity at region overlying AR at pa 215-250 44 17.39 23.49 45 17.45 23.50 01 cleaned. 46 ----- ----- 47 ----- ----- 48 21.52 23.35 49 19.00 23.36 50 17.33 22.59 CME, pa 240-290, 1922-2053. 51 18.01 23.12 coronal depletion pa 272, 2015-2050 52 17.53 22.25 53 17.55 22.59 54 17.35 22.52 55 17.45 23.16 56 17.36 22.54 57 17.27 22.44 ch1 focus work... 58 18.46 21.52 59 17.52 22.58 Prominence expanding from 2130 on at PA=288. 60 17.23 22.29 61 17.16 22.41 CME: PA 260-310, 1929-2118 UT 62 ----- ----- 63 18.41 23.26 64 17.36 22.55 65 17.23 23.19 66 17.34 22.01 67 17.26 22.29 68 17.19 22.30 69 19.45 23.37 70 17.29 21.40 EPL from ~1900 to 2100 at PA=55-70, out to RV=1.25 71 17.14 22.28 72 17.33 23.24 73 17.28 21.36 74 17.15 22.28 75 17.32 19.06 76 18.01 20.44 Possible faint CME 18:30-19:26 UT, PA 35-135 ?????? 77 17.50 21.42 78 17.26 22.26 79 17.21 21.25 80 18.12 20.09 CME at PA=125 throughout observing day 81 ----- ----- 82 18.00 20.48 83 17.43 21.02 84 ----- ----- No data, heavy overcast 85 ----- ----- 86 ----- ----- No data, heavy overcast 87 ----- ----- No data, heavy overcast 88 ----- ----- 89 ----- ----- 90 17.40 20.45 91 ----- ----- 92 ----- ----- 93 ----- ----- 94 17.09 20.41 95 17.02 20.47 96 17.12 22.31 Much of data through thin cirrus. 97 17.16 20.45 98 17.05 20.58 99 17.02 21.19 100 17.03 22.24 101 ----- ----- Extensive cirrus 102 ----- ----- Extensive cirrus 103 ----- ----- Cloudy 104 ----- ----- Cloudy 105 ----- ----- Cloudy 106 ----- ----- Cloudy 107 16.59 22.15 108 17.09 22.45 109 17.08 22.12 Two bugs crawling on mk3 objective lens! 110 16.54 22.00 Electronic errors in channel 0 data. 111 17.22 22.50 More electronic problems. 112 17.02 21.54 CME ~18:15 to 20:00 PA 270. Electronic prob. early in day. 113 17.04 21.00 Troubleshooting electrn. prob. continuing. Some good data. 114 ----- ----- Cloudy 115 ----- ----- Cloudy -- possible snow blizzards! 116 17.18 17.57 (test data 23.26-0.36) channel 1 died, revived. 117 16.57 22.08 more work on channel 1. 118 17.05 20.58 119 17.06 22.37 120 17.00 21.06 121 16.58 21.37 scattered cirrus... 122 ----- ----- dPmon data, but no mk3 data (too cloudy) 123 ----- ----- thick clouds, no observing. 124 16.38 20.50 some cirrus throughout the day. 125 ----- ----- 126 ----- ----- 127 17.10 21.29 some cirrus throughout the day. 128 ----- ----- cloudy 129 ----- ----- cloudy 130 16.43 20.56 serious guider failure!! guider is dissassembled. 131 ----- ----- guider still down 132 ----- ----- guider still down -- gears were stripped... 133 ----- ----- guider still down 134 ----- ----- guider still down -- parts on order... 135 ----- ----- guider still down 136 ----- ----- guider still down 137 ----- ----- new guider motor arrived, tests continue. 138 ----- ----- new motor was installed, cloudy, might get data on DOY 139. 139 ----- ----- guider is fixed and working. No mk3 data due to clouds. 140 18.17 22.52 141 16.49 20.56 142 16.52 21.57 143 ----- ----- cloudy 144 ----- ----- cloudy 145 16.48 20.27 146 16.53 21.06 147 18.28 21.31 148 ----- ----- cloudy 149 ----- ----- cloudy 150 16.53 21.47 Data is impacted by thin cirrus. 151 16.42 21.43 Data impacted by thin haze. 152 ----- ----- 153 17.04 22.15 154 18.29 00.25 155 16.45 22.06 CME at pa 120 from 1930-2100 UT. 156 17.00 22.02 157 17.03 21.19 158 16.41 22.05 159 16.43 22.00 160 16.58 22.48 161 18.34 00.36 162 16.42 22.06 163 16.50 22.10 164 18.00 23.25 165 16.47 21.59 166 16.42 22.01 167 16.50 22.19 168 18.33 01.05 169 16.44 21.58 170 ----- ----- 171 ----- ----- 172 ----- ----- 173 ----- ----- 174 ----- ----- 175 18.45 23.23 176 16.56 21.59 177 16.56 21.27 178 16.54 22.30 179 16.42 19.53 180 16.38 22.10 181 17.12 22.03 182 18.32 19.56 Construction at NOAA 183 16.52 22.02 184 17.00 20.13 Construction at NOAA 185 17.08 20.13 186 ----- ----- 187 ----- ----- 188 17.27 21.27 189 ----- ----- 190 16.59 22.01 191 16.59 22.07 192 16.58 22.14 193 16.49 20.41 Scan log was eaten. 194 16.48 21.56 195 17.07 18.27 196 19.11 22.18 197 16.42 21.59 198 17.06 22.01 199 17.00 22.07 200 16.48 20.10 Some guider problems; some images are not centered on sun. I data drop outs. 201 16.35 22.02 202 ----- ----- 203 18.22 00.09 204 16.45 20.31 Most data marred by cirrus. 205 17.01 22.14 206 ----- ----- 207 16.45 21.00 208 16.52 19.52 209 17.00 21.58 210 18.30 00.42 211 16.43 22.01 212 17.03 22.08 213 17.18 21.52 214 16.51 21.43 215 17.09 20.45 216 17.03 21.08 217 18.40 00.39 218 16.55 22.07 219 ----- ----- 220 17.19 22.01 221 16.43 22.01 222 16.39 22.01 223 17.03 22.03 224 ----- ----- 225 16.56 21.59 226 17.12 21.29 227 17.38 22.00 228 ----- ----- 229 ----- ----- 230 17.03 21.32 AP: 65-85, Large surge at this location from 1700 to 1830 ut, out to RV=1.35. CME accompanied surge. 231 18.56 23.42 232 ----- ----- 233 17.15 22.20 234 17.35 18.40 235 ----- ----- 236 ----- ----- 237 ----- ----- 238 18.44 00.00 239 ----- ----- 240 17.14 20.30 241 16.59 20.33 242 ----- ----- 243 ----- ----- 244 ----- ----- 245 19.57 21.29 Data marred by clouds 246 17.11 22.02 247 17.10 21.55 Possible CME accompanying an EPL at PA=260-275, RV=1.3, 18:08-19.06 ut 248 17.10 22.09 249 16.59 22.03 Time error on first 9 images of 1 hour. 250 16.54 22.09 251 17.13 22.47 252 19.17 23.58 253 16.57 22.01 254 ----- ----- Too cloudy for data. 255 17.09 22.43 256 16.56 22.02 257 17.01 22.03 258 ----- ----- 259 18.46 22.13 cme? 20:47-21:25 ~pa 60. 260 17.22 22.01 Possible EPL or limbflare at PA 70-80, 17:50UT. 261 ----- ----- Bad weather. 262 17.26 22.52 263 17.01 22.01 Time error of 1 hour on first 7 files. 264 17.11 22.02 265 17.20 23.05 266 18.52 23.33 Noisy guider... ? 267 17.07 22.13 Microprocessor swapped to track down "i" data dropouts. 268 ----- ----- Too cloudy for obs. 269 ----- ----- 270 16.59 22.06 271 19.16 22.14 Only a few good images due to fog. 272 ----- ----- Too cloudy for data. 273 17.13 19.52 274 17.18 21.40 275 17.05 21.40 276 17.00 21.39 277 17.09 22.08 278 ----- ----- Too cloudy for obs. 279 ----- ----- Too cloudy for obs. 280 ----- ----- Too cloudy for obs. 281 17.18 22.26 282 ----- ----- Too cloudy for obs. 283 ----- ----- Too cloudy for obs. 01 on mk3 cleaned. 284 17.14 21.57 285 17.03 20.05 286 20.48 22.09 dPmon 01 cleaned, LIMB_EXP, REFERENCE_EXP, and DIFFUSSER_EXP from 12 to 14 287 21.02 22.13 288 17.06 22.01 289 17.13 20.42 290 17.17 20.55 Possible coronal enhancement between 1919 and 1950 UT, around PA=300. 291 ----- ----- Too cloudy for obs. 292 16.53 21.36 293 17.18 22.05 294 17.24 21.24 dPmon tape problems? 295 17.40 22.02 Idropout tests in early a.m. 01 cleaned at 21.53 296 17.12 22.15 Windy, spar was bouncing most of day. 297 ----- ----- Too cloudy for obs. 298 16.59 21.22 But only a few good images due to cirrus. 299 ----- ----- Too cloudy for obs. 300 ----- ----- Too cloudy for obs. 301 ----- ----- Too cloudy for obs. 302 16.58 22.01 Idropout tests in early a.m. 303 17.13 21.29 304 17.32 20.59 305 17.09 21.28 Idropout tests in early a.m. 306 ----- ----- Too cloudy for obs. 307 ----- ----- Too cloudy for obs. 308 ----- ----- Too cloudy for obs. 309 ----- ----- Too cloudy for obs. 310 17.22 22.44 311 17.35 21.50 312 19.04 21.59 313 17.08 21.56 Idropout tests in early a.m. 314 17.24 21.16 315 19.16 22.46 316 17.11 21.24 Idropout tests in early a.m. 317 17.23 22.47 318 17.24 20.52 319 17.08 22.04 Idropout tests in early a.m. 320 ----- ----- 321 17.26 21.37 322 17.38 22.28 323 17.14 23.03 Idropout tests in early a.m. *** Observers report: EPL at PA 277-290, 1700-2245 UT, CME at PA 280-300, 1959-2230 UT. 324 17.25 22.30 325 17.32 22.15 326 17.27 21.12 327 ----- ----- No obs due to clouds 328 ----- ----- No obs due to clouds 329 ----- ----- 330 17.39 21.13 Some obs. marred by clouds. 331 18.31 21.11 Data may be marred by cirrus. 332 ----- ----- No obs due to clouds. 333 ----- ----- No obs due to clouds. 334 ----- ----- No obs due to clouds. 335 17.38 19.46 mk3 computer went belly-up 336 ----- ----- mk3 computer still down... 337 18.30 21.58 338 17.33 21.59 339 17.30 20.51 340 17.24 21.06 Mask tests. Cards swapped after data acquisition ended. 341 17.18 21.21 DCSB AN4 cards swapped between ch0 and ch1 (Idrop test) High sky polarization. 342 17.38 23.22 343 17.47 18.04 Sky polarization or vog present. 344 17.29 22.15 345 17.46 22.29 346 17.47 23.27 347 17.31 22.16 348 17.34 22.02 349 ----- ----- 350 ----- ----- 351 17.32 22.09 352 17.41 22.50 353 17.42 22.23 354 17.48 22.08 Sky polarization high. 355 17.25 21.09 356 ----- ----- 357 ----- ----- 358 ----- ----- 359 ----- ----- 360 17.52 22.34 361 17.30 22.03 362 17.27 22.16 363 18.00 23.05 Poor data quality as dPmon occulting was adjusted. 364 17.42 22.49 Spar may have been jostled: 20:48-22:49 UT 365 ----- -----