PRIME Observation Log 2025/09/01

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Raw Log (Time is in SA time)
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Observation Log (Time is in UT)

Date: 2025/09/01
Local observer: Asahi
Remote observer:
Weather: clear
Comment:
Detector Temperature: 114.00004 +- 0.00147 K
ImageAcquisitionErrors occurred 2 times @
2025-09-02 03:45:02 SAT
2025-09-02 04:35:32 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:42:27
Morning 06:30:12
Science Observation
(Sun altitude < -10°)
Start 19:03:50
End 06:08:50
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:03:50
End 01:23:51


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 11:27:09 11:05:00 1.033
GB Time 05:55:09 06:20:01 0.935
Non-GB Time 05:31:59 04:44:58 1.165


Institute Statistics
- ALLSKY time is equally distributed to each institute
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
CALIB 240 00:11:26 00:22:00 0.520
GB 3240 02:34:26 05:55:09 0.435
SAAO 997 00:47:31 01:53:51 0.417
OU 690 00:32:53 01:12:42 0.452
NASA 690 00:32:53 01:12:42 0.452
ABC 690 00:32:53 01:12:42 0.452


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 240 00:11:26 00:22:00 0.520
Bulge 3192 02:32:09 05:48:47 0.436
SKY 48 00:02:17 00:06:22 0.359
all_sky_grid 2837 02:15:13 04:59:17 0.452
ToO 230 00:10:57 00:32:41 0.335


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OH 240 00:11:26 00:22:00 0.520
GB76_test OH 4 00:00:11 00:02:23 0.080
GB76_test OJ 4 00:00:11 00:01:35 0.120
GB94_test OJ 4 00:00:11 00:01:35 0.120
GB111_test OJ 4 00:00:11 00:01:24 0.136
GB75_test OJ 4 00:00:11 00:02:37 0.073
GB79_test OJ 4 00:00:11 00:00:39 0.289
GB96_test OJ 4 00:00:11 00:01:46 0.107
GB113_test OJ 20 00:00:57 00:06:13 0.153
GB114_dither OJ 48 00:02:17 00:04:52 0.469
GB113_dither OJ 48 00:02:17 00:05:23 0.425
GB112_dither OJ 48 00:02:17 00:04:38 0.493
GB111_dither OJ 48 00:02:17 00:05:00 0.456
GB110_dither OJ 48 00:02:17 00:05:06 0.448
GB109_dither OJ 48 00:02:17 00:04:41 0.488
GB108_dither OJ 96 00:04:34 00:10:09 0.450
GB91_dither OJ 96 00:04:34 00:10:37 0.430
GB92_dither OJ 48 00:02:17 00:05:09 0.444
GB74_dither OJ 96 00:04:34 00:09:27 0.484
GB73_dither OJ 96 00:04:34 00:09:42 0.471
GB72_dither OJ 96 00:04:34 00:09:44 0.470
GB71_dither OJ 96 00:04:34 00:09:53 0.463
GB88_dither OJ 96 00:04:34 00:09:36 0.476
GB89_dither OJ 96 00:04:34 00:09:44 0.470
GB90_dither OJ 96 00:04:34 00:09:41 0.472
GB107_dither OJ 96 00:04:34 00:09:39 0.474
GB106_dither OJ 96 00:04:34 00:10:01 0.456
GB105_dither OJ 96 00:04:34 00:09:19 0.491
GCsky 48 00:02:17 00:06:22 0.359
GB83_dither OJ 96 00:04:34 00:09:53 0.463
GB82_dither OJ 96 00:04:34 00:09:22 0.488
GB81_dither OJ 96 00:04:34 00:09:16 0.494
GB80_dither OJ 96 00:04:34 00:09:50 0.465
GB96_dither OJ 96 00:04:34 00:09:53 0.463
GB97_dither OJ 96 00:04:34 00:09:33 0.479
GB98_dither OJ 96 00:04:34 00:09:36 0.476
GB99_dither OJ 96 00:04:34 00:10:49 0.423
GB100_dither OJ 48 00:02:17 00:04:57 0.461
GB117_dither OJ 48 00:02:17 00:04:49 0.474
GB116_dither OJ 48 00:02:17 00:04:49 0.474
GB115_dither OJ 48 00:02:17 00:05:34 0.411
GB75_test OH 4 00:00:11 00:01:24 0.136
GB74_test OH 4 00:00:11 00:01:44 0.110
GB109_test OH 16 00:00:45 00:04:21 0.175
GB109_dither OH 24 00:01:08 00:02:35 0.440
GB108_dither OH 24 00:01:08 00:02:27 0.465
GB91_dither OH 24 00:01:08 00:02:16 0.503
GB74_dither OH 24 00:01:08 00:02:19 0.493
GB73_dither OH 24 00:01:08 00:02:19 0.493
GB90_dither OH 24 00:01:08 00:02:19 0.493
GB107_dither OH 24 00:01:08 00:02:21 0.484
GB106_dither OH 24 00:01:08 00:02:19 0.493
GB89_dither OH 24 00:01:08 00:02:19 0.493
GB72_dither OH 24 00:01:08 00:02:27 0.465
GB71_dither OH 24 00:01:08 00:02:27 0.465
GB88_dither OH 24 00:01:08 00:02:16 0.503
GB105_dither OH 24 00:01:08 00:02:44 0.418
GB83_dither OH 24 00:01:08 00:02:27 0.465
GB100_dither OH 24 00:01:08 00:02:18 0.494
GB117_dither OH 24 00:01:08 00:02:41 0.424
GB116_dither OH 24 00:01:08 00:02:16 0.503
GB99_dither OH 24 00:01:08 00:02:41 0.425
GB82_dither OH 24 00:01:08 00:02:30 0.456
GB81_dither OH 24 00:01:08 00:02:29 0.458
GB98_dither OH 24 00:01:08 00:02:39 0.431
GB115_dither OH 24 00:01:08 00:02:19 0.493
GB114_dither OH 24 00:01:08 00:02:16 0.503
GB97_dither OH 24 00:01:08 00:02:19 0.493
GB80_dither OH 24 00:01:08 00:02:30 0.456
GB71_test OJ 24 00:01:08 00:06:25 0.178
GB79_dither OJ 48 00:02:17 00:04:55 0.465
field3744_test 20 00:00:57 00:04:27 0.214
field3744 57 00:02:43 00:03:59 0.682
field1811_test 80 00:03:48 00:15:26 0.247
field1811 150 00:07:09 00:17:14 0.415
field13193 40 00:01:54 00:03:47 0.503
field13194 40 00:01:54 00:03:47 0.503
field13195 40 00:01:54 00:03:47 0.503
field13196 40 00:01:54 00:04:06 0.463
field13197 40 00:01:54 00:03:50 0.497
field13198 40 00:01:54 00:04:04 0.469
field13199 40 00:01:54 00:04:04 0.469
field13200 40 00:01:54 00:03:55 0.485
field13201 40 00:01:54 00:03:50 0.497
field13202 40 00:01:54 00:04:01 0.474
field13203 40 00:01:54 00:04:00 0.476
field13211 40 00:01:54 00:04:32 0.419
field13212 40 00:01:54 00:03:50 0.497
field13213 40 00:01:54 00:03:55 0.485
field13214 40 00:01:54 00:04:01 0.474
field13215 40 00:01:54 00:03:50 0.497
field13216 40 00:01:54 00:03:58 0.480
field13217 40 00:01:54 00:03:58 0.480
field13218 40 00:01:54 00:04:23 0.434
field13220 40 00:01:54 00:03:52 0.491
field13221 40 00:01:54 00:03:50 0.497
field13222 40 00:01:54 00:03:50 0.497
field13223 40 00:01:54 00:04:22 0.436
field13224 40 00:01:54 00:04:08 0.461
field13225 40 00:01:54 00:03:51 0.493
field13226 40 00:01:54 00:04:27 0.428
field13227 40 00:01:54 00:03:52 0.491
field13228 40 00:01:54 00:04:04 0.469
field13229 40 00:01:54 00:03:50 0.497
field13230 40 00:01:54 00:04:12 0.453
field13231 40 00:01:54 00:04:00 0.476
field13232 40 00:01:54 00:04:01 0.473
field13233 40 00:01:54 00:04:20 0.438
field13234 40 00:01:54 00:05:31 0.345
field13235 40 00:01:54 00:04:04 0.469
field13236 40 00:01:54 00:04:25 0.431
field13237 40 00:01:54 00:03:59 0.478
field13238 40 00:01:54 00:04:12 0.453
field13239 40 00:01:54 00:04:04 0.469
field13240 40 00:01:54 00:03:52 0.491
field13241 40 00:01:54 00:04:01 0.474
field13242 40 00:01:54 00:04:03 0.470
field13243 40 00:01:54 00:04:20 0.439
field13244 40 00:01:54 00:03:59 0.478
field13245 40 00:01:54 00:03:55 0.485
field13246 40 00:01:54 00:05:36 0.340
field13247 40 00:01:54 00:03:50 0.497
field13248 40 00:01:54 00:03:58 0.480
field13249 40 00:01:54 00:04:20 0.438
field13250 40 00:01:54 00:04:04 0.469
field13251 40 00:01:54 00:03:50 0.497
field13252 40 00:01:54 00:04:09 0.458
field13253 40 00:01:54 00:04:04 0.469
field13254 40 00:01:54 00:04:18 0.443
field13255 40 00:01:54 00:04:12 0.453
field13256 40 00:01:54 00:04:12 0.453
field13257 40 00:01:54 00:04:01 0.474
field13258 40 00:01:54 00:04:01 0.474
field13259 40 00:01:54 00:03:52 0.491
field13260 40 00:01:54 00:03:55 0.485
field13261 40 00:01:54 00:03:50 0.497
field13262 40 00:01:54 00:04:09 0.458
field13263 40 00:01:54 00:04:12 0.453
field13264 40 00:01:54 00:03:58 0.480
field13265 40 00:01:54 00:03:52 0.491
field13266 40 00:01:54 00:03:58 0.480
field13267 40 00:01:54 00:04:12 0.453
field13268 40 00:01:54 00:04:06 0.465
field13269 40 00:01:54 00:13:01 0.146










Stats so far in 2025
Monthly observed fraction so far in 2025
Month Observed Time
(hh:mm:ss) 		Expected Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Jan 103:35:29 259:42:08 0.399
Feb 53:54:42 259:20:18 0.208
Mar 158:57:47 319:07:20 0.498
Apr 161:02:39 338:08:53 0.476
May 244:24:55 372:31:50 0.656
Jun 209:59:39 370:50:11 0.566
Jul 224:49:02 377:25:14 0.596
Aug 230:19:15 357:22:01 0.644
Sep 11:27:09 11:05:00 1.033

Observed time so far in 2025
- Total time of each institute is calculated by the following
    [All observation time in 2025] = [Observed time so far] + [Remaining time in the future]
    [Remaining time in the future] = [Clear sky fraction] x [Remaining night time (Sun alt. < -10°)]
    
    [GB observation time in 2025] = [Observed GB time so far] + [Remaining GB time in the future]
    [Remaining GB time in the future] = [Clear sky fraction] x [Remaining GB night time (Sun alt. < -10° & GB alt. > 22°)]
    
    [Non-GB observation time in 2025] = [All observation time in 2025] - [GB observation time in 2025]
    
    [OU, NASA, ABC time in 2025] = 0.24 x [Non-GB observation time in 2025]
    [SAAO time in 2025] = 0.28 x [Non-GB observation time in 2025]
    
- ALLSKY time is equally distributed to each institute
- ToO time is distributed to each institute based on input of observer of each date
- Clear sky fraction of (0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5, 0.5) is assumed for (Jan, ..., Dec) in the calculation of the remaining observation time
All
(hh:mm:ss) 		GB
(hh:mm:ss) 		Non-GB
(hh:mm:ss) 		SAAO
(hh:mm:ss) 		OU
(hh:mm:ss) 		NASA
(hh:mm:ss) 		ABC
(hh:mm:ss) 		CALIB
(hh:mm:ss)
Total 1954:25:46 1015:39:52 938:45:53 262:51:15 225:18:12 225:18:12 225:18:12 180:48:41
Observed 1398:18:18
(71.55%)		 887:55:58
(87.42%)		 510:22:19
(54.37%)		 117:43:25
(44.79%)		 113:38:00
(50.44%)		 200:44:03
(89.10%)		 78:16:49
(34.74%)		 180:48:41
(N/A)
Remaining 556:07:28
(28.45%)		 127:43:53
(12.58%)		 428:23:34
(45.63%)		 145:07:49
(55.21%)		 111:40:12
(49.56%)		 24:34:09
(10.90%)		 147:01:23
(65.26%)		 00:00:00
(N/A)











Camera status (2025/09/01)



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