PRIME Observation Log 2025/07/31

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Raw Log (Time is in SA time)
Ramp Log (Time is in UT)
CCMain Error Log (Time is in SA time)
Observation Log (Time is in UT)

Date: 2025/07/31
Local observer: Togo
Remote observer:
Weather: CLear -> high humidity
Comment:
Detector Temperature: 114.00054 +- 0.00737 K
ImageAcquisitionErrors occurred 2 times @
2025-08-01 03:30:01 SAT
2025-08-01 03:52:59 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:23:02
Morning 07:02:53
Science Observation
(Sun altitude < -10°)
Start 18:45:17
End 06:40:41
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 18:45:17
End 03:29:41


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 08:44:56 11:55:23 0.734
GB Time 05:17:24 08:44:24 0.605
Non-GB Time 03:27:31 03:10:59 1.087


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 520 00:24:47 00:47:27 0.522
GB 2628 02:05:16 05:17:24 0.395
SAAO 2357 01:52:21 03:09:06 0.594
OU 60 00:02:51 00:06:08 0.466
NASA 60 00:02:51 00:06:08 0.466
ABC 60 00:02:51 00:06:08 0.466


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 520 00:24:47 00:47:27 0.522
Bulge 2580 02:02:58 05:12:01 0.394
SKY 48 00:02:17 00:05:23 0.425
all_sky_grid 2537 02:00:55 03:27:31 0.583


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OJ 520 00:24:47 00:47:27 0.522
GB74_test OJ 88 00:04:11 00:21:33 0.195
GB76_test OH 140 00:06:40 00:30:43 0.217
GB76_dither OH 240 00:11:26 00:24:37 0.465
GB77_dither OH 240 00:11:26 00:25:21 0.451
GB78_dither OH 240 00:11:26 00:24:26 0.468
GB94_dither OH 240 00:11:26 00:24:18 0.471
GB111_dither OH 240 00:11:26 00:25:19 0.452
GB110_dither OH 240 00:11:26 00:25:15 0.453
GB109_dither OH 120 00:05:43 00:12:48 0.447
GB92_dither OH 72 00:03:25 00:07:31 0.457
GB93_dither OH 72 00:03:25 00:07:11 0.477
GB75_dither OH 120 00:05:43 00:12:29 0.458
GB112_dither OH 120 00:05:43 00:26:27 0.216
GB79_dither OH 96 00:04:34 00:10:54 0.419
GB60_dither OH 48 00:02:17 00:04:47 0.478
GB95_dither OH 48 00:02:17 00:05:15 0.435
GB113_dither OH 48 00:02:17 00:05:00 0.456
GCsky 48 00:02:17 00:05:23 0.425
GB108_dither OH 24 00:01:08 00:02:46 0.413
GB74_dither OH 24 00:01:08 00:02:42 0.423
GB91_dither OH 24 00:01:08 00:02:21 0.484
GB80_dither OH 24 00:01:08 00:02:27 0.465
GB97_dither OH 24 00:01:08 00:02:47 0.411
GB114_dither OH 24 00:01:08 00:02:19 0.493
GB96_dither OH 24 00:01:08 00:02:36 0.440
field363_test 135 00:06:26 00:22:03 0.292
field363 760 00:36:13 01:07:12 0.539
field516 19 00:00:54 00:13:25 0.067
field3361_test 15 00:00:42 00:01:53 0.379
field3361 684 00:32:36 00:38:53 0.838
field3173 684 00:32:36 00:39:29 0.825
field12622 40 00:01:54 00:03:52 0.491
field12623 40 00:01:54 00:03:50 0.497
field12624 40 00:01:54 00:03:52 0.491
field12625 40 00:01:54 00:03:50 0.497
field12626 40 00:01:54 00:03:47 0.503
field12627 40 00:01:54 00:05:19 0.358










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

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 1896:52:50 975:42:39 921:10:11 257:55:39 221:04:50 221:04:50 221:04:50 167:20:02
Observed 1156:31:51
(60.97%)		 727:59:11
(74.61%)		 428:32:39
(46.52%)		 79:09:18
(30.69%)		 100:19:09
(45.38%)		 184:06:13
(83.27%)		 64:57:57
(29.39%)		 167:20:02
(N/A)
Remaining 740:20:59
(39.03%)		 247:43:27
(25.39%)		 492:37:31
(53.48%)		 178:46:20
(69.31%)		 120:45:41
(54.62%)		 36:58:37
(16.73%)		 156:06:52
(70.61%)		 00:00:00
(N/A)











Camera status (2025/07/31)



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