**********************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 1998: (DOY = Day of Year) YEAR DOY Begin End Year (UT) (UT) 1998 1 ----- ----- 1998 2 ----- ----- 1998 3 ----- ----- 1998 4 ----- ----- 1998 5 17.43 20.43 1998 6 17.49 22.08 1998 7 17.28 22.39 1998 8 ----- ----- 1998 9 ----- ----- 1998 10 ----- ----- 1998 11 ----- ----- 1998 12 19.17 22.11 1998 13 18.06 22.25 1998 14 ----- ----- 1998 15 ----- ----- 1998 16 ----- ----- 1998 17 ----- ----- 1998 18 ----- ----- 1998 19 18.14 19.04 1998 20 17.45 21.15 1998 21 ----- ----- 1998 22 ----- ----- 1998 23 17.48 22.19 1998 24 17.30 22.18 1998 25 ----- ----- 1998 26 17.37 22.06 1998 27 17.36 22.10 1998 28 ----- ----- 1998 29 18.46 22.04 1998 30 18.08 21.49 1998 31 20.15 22.16 1998 32 ----- ----- 1998 33 17.59 22.05 1998 34 ----- ----- 1998 35 ----- ----- 1998 36 ----- ----- 1998 37 17.39 22.05 1998 38 17.56 22.11 1998 39 17.34 22.07 1998 40 17.42 22.08 1998 41 17.28 22.02 1998 42 17.30 22.03 1998 43 17.40 22.07 1998 44 18.08 22.06 1998 45 17.32 22.10 1998 46 ----- ----- 1998 47 17.28 22.08 1998 48 17.38 22.06 1998 49 17.25 22.15 1998 50 18.43 21.07 1998 51 17.28 22.00 1998 52 17.46 22.01 1998 53 17.32 22.05 1998 54 17.51 22.09 1998 55 17.31 22.02 1998 56 17.36 22.27 1998 57 17.24 22.04 1998 58 17.30 22.09 1998 59 17.20 22.11 1998 60 17.21 22.03 1998 61 17.22 22.02 1998 62 17.16 22.03 1998 63 17.25 22.03 1998 64 17.29 22.06 1998 65 ----- ----- 1998 66 17.29 22.05 1998 67 17.23 21.52 1998 68 17.12 22.01 1998 69 18.18 21.38 1998 70 ----- ----- 1998 71 17.15 22.04 1998 72 17.09 22.11 1998 73 17.17 22.03 1998 74 17.14 22.01 1998 75 17.14 22.02 1998 76 17.14 22.06 1998 77 ----- ----- 1998 78 17.11 22.08 1998 79 17.14 22.06 1998 80 ----- ----- 1998 81 ----- ----- 1998 82 17.17 22.02 1998 83 17.07 22.06 1998 84 17.26 22.15 1998 85 17.26 22.10 1998 86 17.07 22.59 1998 87 17.22 22.27 1998 88 ----- ----- 1998 89 17.13 22.04 1998 90 17.09 21.21 1998 91 17.21 22.41 1998 92 17.20 22.31 1998 93 16.53 22.05 1998 94 17.14 22.14 1998 95 17.07 22.28 1998 96 16.55 22.07 1998 97 16.54 22.05 1998 98 17.14 22.21 1998 99 17.24 21.13 1998 100 17.04 22.06 1998 101 ----- ----- 1998 102 17.19 22.06 1998 103 16.52 22.06 1998 104 16.53 22.04 1998 105 17.08 22.27 1998 106 17.12 22.07 1998 107 16.52 22.07 1998 108 17.32 22.17 1998 109 ----- ----- 1998 110 ----- ----- 1998 111 16.41 22.03 1998 112 17.30 22.06 1998 113 17.12 21.57 1998 114 16.59 18.06 1998 115 ----- ----- 1998 116 17.15 21.37 1998 117 16.49 21.56 1998 118 17.00 23.15 1998 119 ----- ----- 1998 120 ----- ----- 1998 121 16.44 22.07 1998 122 17.07 22.22 1998 123 17.13 19.49 1998 124 ----- ----- 1998 125 ----- ----- 1998 126 17.14 22.18 1998 127 18.54 20.33 1998 128 ----- ----- 1998 129 17.10 20.10 1998 130 16.51 20.19 1998 131 17.30 22.04 1998 132 16.39 21.35 1998 133 ----- ----- 1998 134 ----- ----- 1998 135 19.09 20.03 1998 136 ----- ----- 1998 137 ----- ----- 1998 138 17.48 21.25 1998 139 16.33 20.49 1998 140 17.19 21.00 1998 141 17.16 22.01 1998 142 16.39 22.07 1998 143 ----- ----- 1998 144 17.07 22.15 1998 145 16.39 20.47 1998 146 16.32 20.05 1998 147 ----- ----- 1998 148 ----- ----- 1998 149 ----- ----- 1998 150 16.59 22.07 1998 151 16.54 22.07 1998 152 ----- ----- 1998 153 ----- ----- 1998 154 ----- ----- 1998 155 ----- ----- 1998 156 16.37 21.09 1998 157 17.02 22.22 1998 158 17.12 21.39 1998 159 16.38 22.07 1998 160 21.51 22.18 1998 161 17.01 22.21 1998 162 17.03 22.11 1998 163 16.34 22.08 1998 164 16.42 22.13 1998 165 16.53 22.19 1998 166 16.43 21.40 1998 167 16.44 21.16 1998 168 ----- ----- 1998 169 20.03 22.27 1998 170 18.18 22.06 1998 171 16.43 22.20 1998 172 ----- ----- 1998 173 ----- ----- 1998 174 ----- ----- 1998 175 ----- ----- 1998 176 ----- ----- 1998 177 ----- ----- 1998 178 ----- ----- 1998 179 16.42 21.32 1998 180 16.39 22.09 1998 181 ----- ----- 1998 182 19.48 21.39 1998 183 16.59 22.01 1998 184 16.40 22.12 1998 185 17.08 21.17 1998 186 16.58 21.43 1998 187 16.36 22.00 1998 188 ----- ----- 1998 189 17.07 22.26 1998 190 16.54 22.36 1998 191 16.48 22.06 1998 192 16.57 21.59 1998 193 16.55 21.54 1998 194 16.33 22.10 1998 195 ----- ----- 1998 196 17.00 21.04 1998 197 ----- ----- 1998 198 16.25 22.18 1998 199 17.03 22.17 1998 200 16.47 22.41 1998 201 ----- ----- 1998 202 16.36 17.25 1998 203 20.09 22.03 1998 204 17.02 23.14 1998 205 16.38 22.01 1998 206 17.11 20.46 1998 207 17.09 20.20 1998 208 16.30 22.00 1998 209 ----- ----- 1998 210 17.11 22.12 1998 211 17.10 22.13 1998 212 16.37 22.12 1998 213 ----- ----- 1998 214 ----- ----- 1998 215 16.33 22.03 1998 216 ----- ----- 1998 217 17.06 22.11 1998 218 17.14 22.05 1998 219 16.45 22.03 1998 220 19.12 21.36 1998 221 16.56 21.58 1998 222 19.22 22.14 1998 223 ----- ----- 1998 224 17.06 21.56 1998 225 16.54 22.14 1998 226 16.41 22.18 1998 227 16.54 22.13 1998 228 16.53 21.37 1998 229 16.39 22.20 1998 230 ----- ----- 1998 231 16.51 22.51 1998 232 16.52 22.06 1998 233 16.44 20.29 1998 234 17.04 19.21 1998 235 ----- ----- 1998 236 16.51 23.54 1998 237 16.40 21.11 1998 238 16.58 22.12 1998 239 17.00 23.01 1998 240 16.40 21.13 1998 241 16.50 22.04 1998 242 16.57 21.06 1998 243 16.45 22.03 1998 244 16.37 22.08 1998 245 ----- ----- 1998 246 16.50 21.33 1998 247 16.46 22.04 1998 248 16.58 22.23 1998 249 16.52 21.48 1998 250 ----- ----- 1998 251 16.46 21.52 1998 252 17.06 20.29 1998 253 ----- ----- 1998 254 16.46 22.06 1998 255 16.59 22.12 1998 256 17.05 22.04 1998 257 16.44 22.09 1998 258 16.45 21.23 1998 259 17.50 22.11 1998 260 ----- ----- 1998 261 16.46 22.11 1998 262 17.30 22.07 1998 263 17.29 19.30 1998 264 ----- ----- 1998 265 16.43 22.02 1998 266 18.25 20.43 1998 267 16.44 22.03 1998 268 16.40 22.06 1998 269 ----- ----- 1998 270 17.10 22.30 1998 271 18.59 21.05 1998 272 16.42 22.07 1998 273 17.10 22.24 1998 274 16.42 21.36 1998 275 16.43 22.03 1998 276 17.16 21.43 1998 277 ----- ----- 1998 278 17.13 22.18 1998 279 16.47 22.08 1998 280 17.47 21.50 1998 281 ----- ----- 1998 282 16.45 22.04 1998 283 17.10 21.13 1998 284 17.09 19.16 1998 285 16.44 21.05 1998 286 16.51 19.21 1998 287 17.05 21.49 1998 288 ----- ----- 1998 289 17.00 20.43 1998 290 17.04 19.52 1998 291 ----- ----- 1998 292 ----- ----- 1998 293 ----- ----- 1998 294 19.37 21.23 1998 295 01.16 01.19 1998 296 ----- ----- 1998 297 17.25 17.34 1998 298 ----- ----- 1998 299 00.38 21.52 1998 300 00.05 23.56 1998 301 20.15 23.15 1998 302 00.01 23.58 1998 303 17.18 22.13 1998 304 16.50 22.15 1998 305 16.55 23.12 1998 306 17.07 22.08 1998 307 20.58 22.27 1998 308 19.48 20.11 1998 309 ----- ----- 1998 310 ----- ----- 1998 311 ----- ----- 1998 312 ----- ----- 1998 313 17.38 20.20 1998 314 ----- ----- 1998 315 ----- ----- 1998 316 ----- ----- 1998 317 17.08 22.03 1998 318 17.02 23.13 1998 319 17.13 21.04 1998 320 17.09 22.03 1998 321 17.37 21.52 1998 322 ----- ----- 1998 323 ----- ----- 1998 324 ----- ----- 1998 325 ----- ----- 1998 326 ----- ----- 1998 327 ----- ----- 1998 328 17.23 22.05 1998 329 17.12 23.00 1998 330 16.59 22.01 1998 331 17.38 22.12 1998 332 17.17 23.03 1998 333 17.16 22.12 1998 334 ----- ----- 1998 335 17.12 22.08 1998 336 ----- ----- 1998 337 20.42 20.58 1998 338 17.45 18.14 1998 339 ----- ----- 1998 340 ----- ----- 1998 341 ----- ----- 1998 342 ----- ----- 1998 343 ----- ----- 1998 343 ----- ----- 1998 344 ----- ----- 1998 345 17.36 22.05 1998 346 17.31 23.05 1998 347 17.24 23.04 1998 348 17.32 22.07 1998 349 18.15 22.03 1998 350 17.25 22.18 1998 351 17.28 19.47 1998 352 17.23 21.33 1998 353 17.21 22.22 1998 354 17.19 22.20 1998 355 17.29 22.05 1998 356 17.35 17.39 1998 357 ----- ----- 1998 358 ----- ----- 1998 359 ----- ----- 1998 360 ----- ----- 1998 361 ----- ----- 1998 362 ----- ----- 1998 363 17.28 22.09 1998 364 17.40 23.08 1998 365 ----- -----