**********************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 1996: Day of Begin End Year (UT) (UT) 1996 1 ----- ----- 1996 2 17.53 23.14 1996 3 17.49 20.58 dPmon wiring investigated. 1996 4 17.52 21.59 network came back up mid-day. 1996 5 18.09 22.57 1996 6 17.56 22.46 1996 7 17.51 22.27 1996 8 17.38 22.06 1996 9 ----- ----- 1996 10 ----- ----- 1996 11 17.39 20.52 AN4 cards swapped back, Idropouts appear to have come from a bad board. Bad (orig ch0) replaced with spare. (AN4 cards were swapped between ch0 and ch1 on 95d341) 1996 12 ----- ----- 1996 13 ----- ----- 1996 14 17.48 22.29 1996 15 18.02 23.23 1996 16 ----- ----- 1996 17 17.33 22.28 Mask data taken. 1996 18 18.30 20.13 1996 19 ----- ----- Very stormy weather. 1996 20 17.56 23.42 1996 21 ----- ----- Heavy snow at the observatory... 1996 22 ----- ----- Bad weather continues. 1996 23 ----- ----- 1996 24 ----- ----- Bad weather continuing. 1996 25 ----- ----- Bad weather continuing. 1996 26 ----- ----- 1996 27 ----- ----- Too slippery to get up the mountain. 1996 28 ----- ----- Clouds. 1996 29 18.01 22.04 1996 30 ----- ----- 1996 31 17.32 20.38 Data quality marred by blowing snow... 1996 32 18.13 22.10 1996 33 ----- ----- 1996 34 ----- ----- 1996 35 ----- ----- 1996 36 17.23 22.00 Sky polarization quite high. 1996 37 ----- ----- 1996 38 17.28 22.03 Sky quite noisy 1996 39 17.31 22.12 1996 40 ----- ----- 1996 41 ----- ----- 1996 42 17.40 22.00 1996 43 18.05 23.54 1996 44 17.55 23.06 1996 45 17.32 22.44 Data marred by cirrus. 1996 46 17.58 21.47 1996 47 20.02 21.36 EPL observed at PA 310 out to 1.2 Rsun. 1996 48 ----- ----- 1996 49 ----- ----- 1996 50 ----- ----- Heavy rain. 1996 51 ----- ----- Heavy rain. 1996 52 ----- ----- Too cloudy for obs. 1996 53 ----- ----- Too cloudy for obs. 1996 54 ----- ----- 1996 55 ----- ----- 1996 56 ----- ----- Heavy snow at observatory. 1996 57 18.31 21.23 1996 58 17.53 18.24 1996 59 17.33 22.14 1996 60 18.03 21.39 Sky very polarized. 1996 61 19.24 22.50 1996 62 ----- ----- 1996 63 ----- ----- 1996 64 ----- ----- 1996 65 17.44 22.31 1996 66 17.15 22.13 1996 67 17.16 22.23 dPmon vignetting adjusted... 1996 68 17.40 23.25 Small EPL at PA=270 around 2200 ut, no CME noticed. 1996 69 17.35 22.04 1996 70 17.14 22.55 Opal in a few scans during dome reconfiguration. 1996 71 17.44 23.16 1996 72 17.29 22.00 1996 73 17.11 21.55 Opal in a few scans during dome reconfiguration. 1996 74 17.14 22.20 1996 75 18.49 22.45 1996 76 17.35 22.52 M1 adjusted on dPmon in vignetting experiment. 1996 77 17.18 22.41 01 on mk3 cleaned 1996 78 17.27 22.01 1996 79 ----- ----- 1996 80 17.19 22.26 1996 81 17.16 20.14 1996 82 ----- ----- 1996 83 17.34 22.48 1996 84 17.05 21.56 Spar may have been jiggled due to maintenance. 1996 85 16.58 22.23 Guider problems due to high, gust winds... 1996 86 17.27 21.04 1996 87 ----- ----- 1996 88 ----- ----- 1996 89 17.32 20.54 1996 90 ----- ----- 1996 91 17.15 19.22 1996 92 17.27 18.56 1996 93 ----- ----- 1996 94 ----- ----- 1996 95 ----- ----- 1996 96 17.21 22.06 Data marred by electronic spikes... 1996 97 17.24 22.33 Data marred by electronic spikes... 1996 98 17.00 23.01 mk3 repaired by end of day. 1996 99 ----- ----- 1996 100 16.53 22.06 1996 101 17.03 22.24 1996 102 16.51 21.59 1996 103 ----- ----- 1996 104 17.28 22.14 1996 105 16.58 21.47 1996 106 17.10 22.12 1996 107 17.24 22.40 1996 108 ----- ----- 1996 109 17.02 18.32 1996 110 17.40 21.22 1996 111 17.16 20.11 1996 112 17.30 19.01 1996 113 18.54 19.57 1996 114 17.11 19.10 1996 115 18.14 19.19 1996 116 17.16 19.28 1996 117 17.14 20.10 1996 118 17.03 19.42 1996 119 17.04 20.39 1996 120 17.05 21.29 1996 121 16.56 21.07 Data marred by cirrus... 1996 122 ----- ----- 1996 123 17.14 21.49 1996 124 18.44 23.15 1996 125 17.05 21.41 Some problmes with the CHIP computer... 1996 126 16.54 22.08 CME, PA 110-130, 1739-1929 UT 1996 127 ----- ----- clouds 1996 128 ----- ----- clouds 1996 129 ----- ----- no mk3 data, but there is dPmon and CHIP 1996 130 17.00 21.58 1996 131 ----- ----- 1996 132 16.54 22.52 1996 133 16.53 21.08 1996 134 16.56 21.50 1996 135 16.51 21.58 1996 136 16.49 21.44 1996 137 16.42 22.03 1996 138 17.03 22.17 1996 139 ----- ----- 1996 140 17.02 20.12 1996 141 ----- ----- 1996 142 16.49 22.26 1996 143 16.40 22.07 1996 144 16.43 22.07 1996 145 17.14 22.21 1996 146 16.56 22.09 1996 147 16.48 22.23 1996 148 16.59 22.06 1996 149 16.54 22.03 1996 150 16.53 21.24 1996 151 16.54 19.34 1996 152 18.51 23.07 1996 153 16.58 22.07 1996 154 16.51 22.00 1996 155 16.42 22.07 1996 156 16.58 22.16 1996 157 16.49 19.41 1996 158 16.47 00.50 EPL and CME, PA 300, ~ 2000 UT to 0015 UT. 1996 159 17.30 22.18 1996 160 16.59 21.46 1996 161 ----- ----- cloudy 1996 162 16.56 20.46 cloudy 1996 163 16.57 21.37 1996 164 17.06 22.33 1996 165 16.50 22.04 1996 166 16.56 22.14 1996 167 ----- ----- cloudy 1996 168 ----- ----- cloudy 1996 169 ----- ----- cloudy 1996 170 17.04 22.13 cloudy 1996 171 16.51 22.18 cloudy 1996 172 16.39 22.02 1996 173 17.11 21.50 1996 174 16.53 22.45 1996 175 16.45 22.02 1996 176 16.57 20.21 1996 177 16.58 22.17 1996 178 17.45 21.55 Time errors for dPmon and chip 1996 179 16.52 21.51 Time errors for dPmon and chip, corrected early in day. 1996 180 17.04 21.48 1996 181 ----- ----- 1996 182 16.52 21.59 1996 183 17.03 22.25 1996 184 17.11 22.30 1996 185 16.53 22.02 1996 186 16.50 21.49 1996 187 19.13 22.30 1996 188 17.06 21.10 1996 189 ----- ----- 1996 190 17.06 22.21 1996 191 17.17 22.22 1996 192 ----- ----- 1996 193 ----- ----- cloudy 1996 194 ----- ----- 1996 195 ----- ----- 1996 196 16.52 22.44 1996 197 16.52 22.11 1996 198 17.05 21.08 1996 199 ----- ----- 1996 200 ----- ----- 1996 201 ----- ----- 1996 202 ----- ----- 1996 203 17.00 20.45 1996 204 ----- ----- 1996 205 ----- ----- 1996 206 17.22 00.01 Data marred by thick clouds. 1996 207 ----- ----- No MK3 data due to heavy clouds. 1996 208 17.25 21.15 Data marred by thick clouds. 1996 209 17.12 19.36 1996 210 16.52 21.55 1996 211 17.03 21.54 1996 212 17.09 23.01 1996 213 16.54 22.02 dPmon daystar filter adjusted on this day. 1996 214 16.44 22.11 more daystar adjustments 1996 215 17.10 22.35 1996 216 17.05 22.36 1996 217 16.49 22.06 more daystar adjustments. 1996 218 17.01 22.54 1996 219 ----- ----- 1996 220 16.47 22.23 1996 221 16.55 22.14 1996 222 17.07 22.46 1996 223 16.58 22.56 possible depletion and cme at PA300,PA255 at ~20:30ut ??? mk3 electronic noise problem noted (alice) 1996 224 17.07 22.03 1996 225 17.05 22.33 1996 226 16.59 17.54 1996 227 16.49 22.05 electronic noise problem in mk3 data is solved. 1996 228 16.44 22.02 1996 229 17.06 22.25 1996 230 17.05 22.51 1996 231 19.04 22.01 1996 232 17.06 22.11 1996 233 17.50 21.47 1996 234 ----- ----- 1996 235 ----- ----- 1996 236 17.21 21.23 1996 237 17.10 22.27 1996 238 ----- ----- 1996 239 17.03 22.18 1996 240 17.03 22.14 1996 241 ----- ----- 1996 242 ----- ----- 1996 243 17.08 21.14 1996 244 17.18 22.11 1996 245 17.07 21.53 1996 246 17.07 21.48 1996 247 17.03 20.12 1996 248 ----- ----- 1996 249 17.05 21.34 1996 250 16.53 20.42 (NOAA computer left on...) 1996 251 16.59 19.04 1996 252 17.00 19.26 1996 253 16.52 21.47 1996 254 ----- ----- 1996 255 17.12 22.27 1996 256 16.53 22.07 Breaker on MK3 tripped. 1996 257 18.33 21.22 1996 258 ----- ----- 1996 259 17.43 22.04 1996 260 17.16 00:36 ***Possible*** CME east limb, 2201-2302 1996 261 17.07 03.35 EPL east limb, pa90 00:07 to ? UT Problmes with dPmon all day. EPL shows up nicely in chip data. mk3 data marred by clouds. 1996 262 16.50 23.30 Work done on mk3 channel1, and dark tests for noise at various angles made. 1996 263 17.16 21.00 1996 264 17.20 20.30 1996 265 20.49 23.39 1996 266 ----- ----- 1996 267 ----- ----- 1996 268 ----- ----- hairlines placed on slits for ch1 -- unwound syncho spring 1996 269 20.42 03.27 barrel angle looks ok? alignment work done on ch1, cleaned mirror -- may have signal problmes -- data noisy. 1996 270 17.02 23.46 1996 271 16.46 02.22 1996 272 16.58 22.21 1996 273 17.04 22.52 1996 274 17.19 20.58 1996 275 16.59 23.47 1996 276 17.59 22.05 1996 277 17.19 22.02 Possible EPL at 21:05, PA 205-225. 1996 278 17.08 23.07 ntp deamon permantly installed. EPL: PA=205 to 250, RV=1.15 max., from around 1915 on through day. 1996 279 16.55 00.03 1996 280 16.54 22.27 1996 281 17.47 22.05 1996 282 ----- ----- 1996 283 16.55 23.12 1996 284 17.09 22.25 1996 285 17.06 20.18 1996 286 17.02 22.45 1996 287 17.08 23.46 ch1 detectors aligned. 1996 288 17.18 22.56 1996 289 17.27 22.06 1996 290 16.58 19.29 Possible CME, PA 120 from 1711-1929 UT -- Not seen in calibrated data -- Alice Lecinski 1996 291 17.25 18.14 1996 292 17.06 19.40 1996 293 17.28 19.27 CME 17.28-19.01 PA 135deg. 1996 294 17.00 19.31 mk3 tape got stuck in drive -- data may not be retrievable. 1996 295 17.38 20.24 1996 296 ----- ----- 1996 297 17.16 20.01 1996 298 17.01 20.06 1996 299 17.08 22.33 1996 300 16.58 20.56 1996 301 ----- ----- 1996 302 ----- ----- 1996 303 ----- ----- 1996 304 17.06 22.36 1996 305 17.35 20.21 Only 6 images taken during this time. 1996 306 18.15 18.38 1996 307 17.06 20.06 1996 308 17.44 22.19 1996 309 17.33 22.36 1996 310 ----- ----- 1996 311 17.10 19.47 1996 312 17.54 19.21 1996 313 17.53 20.51 1996 314 17.21 20.06 1996 315 17.38 19.14 1996 316 17.44 22.45 1996 317 ----- ----- 1996 318 ----- ----- 1996 319 ----- ----- 1996 320 ----- ----- 1996 321 ----- ----- 1996 322 ----- ----- 1996 323 17.51 22.07 Data may be marred by clouds. 1996 324 17.27 20.19 MK3 had problems midway though obs period -- obs. report no signal getting to display. 1996 325 18.00 19.34 MK3 lost signal again -- doesn't look good. 1996 326 ----- ----- MK3 repaired. 1996 327 ----- ----- 1996 328 ----- ----- 1996 329 ----- ----- 1996 330 17.44 23.07 Electronic streak noise marrs mk3 data. 1996 331 12.12 19.41 MK3 seems to be back to normal... 1996 332 00.48 01.43 MK3 trouble shooting continues. 1996 333 ----- ----- 1996 334 18.01 23.03 MK3 improved. 1996 335 ----- ----- 1996 336 ----- ----- 1996 337 ----- ----- 1996 338 17.29 21.53 MK3 still has problems. 1996 339 17.28 22.29 MK3 possibly fixed. 1996 340 17.36 22.13 ch1 alignment work. 1996 341 ----- ----- 1996 342 ----- ----- 1996 343 ----- ----- 1996 344 17.50 23.18 1996 345 17.28 23.27 1996 346 ----- ----- mk3 wiring "robust-a-sized" 1996 347 ----- ----- 1996 348 17.45 22.07 1996 349 17.47 23.04 1996 350 21.25 22.00 1996 351 17.49 23.06 1996 352 17.33 22.05 1996 353 17.33 22.33 1996 354 17.42 22.04 1996 355 ----- ----- 1996 356 ----- ----- 1996 357 18.52 22.11 1996 358 ----- ----- 1996 359 ----- ----- 1996 360 ----- ----- 1996 361 17.38 23.01 1996 362 ----- ----- 1996 363 ----- ----- 1996 364 ----- ----- 1996 365 ----- ----- 1996 366 ----- -----