PRIME Observation Log 2026/02/01

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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: 2026/02/01
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 111.99983 +- 0.00179 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:02:59
Morning 05:38:04
Science Observation
(Sun altitude < -10°)
Start 20:26:38
End 05:14:24
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 03:49:04
End 05:14:24


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 07:56:36 08:47:45 0.903
GB Time 00:54:30 01:25:20 0.639
Non-GB Time 07:02:06 07:22:25 0.954


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 352 00:16:46 00:41:47 0.402
GB 484 00:23:04 00:54:30 0.423
SAAO 1056 00:50:20 01:45:31 0.477
OU 1056 00:50:20 01:45:31 0.477
NASA 1056 00:50:20 01:45:31 0.477
ABC 1056 00:50:20 01:45:31 0.477


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 352 00:16:46 00:41:47 0.402
all_sky_grid 4224 03:21:20 07:02:06 0.477
Bulge 460 00:21:55 00:51:55 0.422
SKY 24 00:01:08 00:02:35 0.443


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
test DY 4 00:00:11 00:00:41 0.276
FLAT_test OJ 16 00:00:45 00:11:05 0.069
FLAT OJ 332 00:15:49 00:30:00 0.527
field5187_test 20 00:00:57 00:13:14 0.072
field5187 60 00:02:51 00:05:40 0.503
field5188 60 00:02:51 00:05:40 0.503
field5189 60 00:02:51 00:05:40 0.503
field5190 60 00:02:51 00:06:25 0.445
field5191 60 00:02:51 00:05:43 0.499
field5192 60 00:02:51 00:05:40 0.503
field5193 60 00:02:51 00:05:46 0.495
field5194 60 00:02:51 00:05:49 0.491
field5195 60 00:02:51 00:05:52 0.487
field5196 60 00:02:51 00:05:46 0.495
field5197 60 00:02:51 00:05:57 0.480
field5422 60 00:02:51 00:05:46 0.495
field5423 60 00:02:51 00:05:43 0.499
field5424 60 00:02:51 00:05:49 0.491
field5425 60 00:02:51 00:05:49 0.491
field5426 60 00:02:51 00:05:46 0.495
field5427 60 00:02:51 00:05:46 0.495
field5428 60 00:02:51 00:05:46 0.495
field5429 60 00:02:51 00:05:46 0.495
field5430 60 00:02:51 00:05:49 0.491
field5431 60 00:02:51 00:05:46 0.495
field5432 60 00:02:51 00:06:45 0.423
field5662 60 00:02:51 00:05:49 0.491
field5663 60 00:02:51 00:05:46 0.495
field5664 60 00:02:51 00:05:43 0.499
field5665 60 00:02:51 00:05:43 0.499
field5666 60 00:02:51 00:05:46 0.495
field5667 60 00:02:51 00:05:46 0.495
field5668 60 00:02:51 00:05:46 0.495
field5669 60 00:02:51 00:05:49 0.491
field5670 60 00:02:51 00:05:43 0.499
field5671 60 00:02:51 00:05:46 0.495
field5672 60 00:02:51 00:05:59 0.477
field2899_test 4 00:00:11 00:00:59 0.193
field2899 60 00:02:51 00:05:43 0.499
field2900 60 00:02:51 00:05:46 0.495
field2901 60 00:02:51 00:05:49 0.491
field2902 60 00:02:51 00:05:46 0.495
field2903 60 00:02:51 00:05:40 0.503
field2904 60 00:02:51 00:05:43 0.499
field2905 60 00:02:51 00:05:46 0.495
field2906 60 00:02:51 00:05:46 0.495
field2907 60 00:02:51 00:05:46 0.495
field2908 60 00:02:51 00:05:43 0.499
field2909 60 00:02:51 00:05:46 0.495
field2910 60 00:02:51 00:05:46 0.495
field2911 60 00:02:51 00:05:46 0.495
field2912 60 00:02:51 00:05:43 0.499
field2913 60 00:02:51 00:05:43 0.499
field2914 60 00:02:51 00:05:49 0.491
field2915 60 00:02:51 00:05:46 0.495
field2916 60 00:02:51 00:05:46 0.495
field2917 60 00:02:51 00:05:43 0.499
field2918 60 00:02:51 00:05:43 0.499
field2919 60 00:02:51 00:05:46 0.495
field2920 60 00:02:51 00:05:46 0.495
field2921 60 00:02:51 00:05:46 0.495
field2922 60 00:02:51 00:05:43 0.499
field2923 60 00:02:51 00:05:43 0.499
field2924 60 00:02:51 00:05:40 0.503
field2925 60 00:02:51 00:05:43 0.499
field2926 60 00:02:51 00:05:43 0.499
field2927 60 00:02:51 00:05:43 0.499
field2928 60 00:02:51 00:05:43 0.499
field2929 60 00:02:51 00:05:43 0.499
field2930 60 00:02:51 00:05:43 0.499
field2931 60 00:02:51 00:07:47 0.367
field2940 60 00:02:51 00:05:40 0.503
field2941 60 00:02:51 00:05:40 0.503
field2942 60 00:02:51 00:05:43 0.499
field2943 60 00:02:51 00:06:36 0.432
GB83_test OH 28 00:01:20 00:08:54 0.150
GB83_dither OH 24 00:01:08 00:02:21 0.484
GB100_dither OH 24 00:01:08 00:02:19 0.493
GB117_dither OH 24 00:01:08 00:02:21 0.484
GB82_dither OH 24 00:01:08 00:02:16 0.503
GB99_dither OH 24 00:01:08 00:02:16 0.503
GB116_dither OH 24 00:01:08 00:02:21 0.484
GB81_dither OH 24 00:01:08 00:02:19 0.493
GB98_dither OH 24 00:01:08 00:02:21 0.484
GB115_dither OH 24 00:01:08 00:03:18 0.347
GB94_dither OH 24 00:01:08 00:02:19 0.493
GB111_dither OH 24 00:01:08 00:02:19 0.493
GB110_dither OH 24 00:01:08 00:02:19 0.493
GB109_dither OH 24 00:01:08 00:02:21 0.484
GB92_dither OH 24 00:01:08 00:02:21 0.484
GB93_dither OH 24 00:01:08 00:02:19 0.493
GB75_dither OH 24 00:01:08 00:02:19 0.493
GB76_dither OH 24 00:01:08 00:02:16 0.503
GB77_dither OH 24 00:01:08 00:02:27 0.465
GCsky 24 00:01:08 00:02:35 0.443










Stats so far in 2026
Monthly observed fraction so far in 2026
Month Observed Time
(hh:mm:ss) 		Expected Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Jan 55:55:01 259:31:55 0.215
Feb 07:56:36 08:47:45 0.903

Observed time so far in 2026
- Total time of each institute is calculated by the following
    [All observation time in 2026] = [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 2026] = [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 2026] = [All observation time in 2026] - [GB observation time in 2026]
    
    [OU, NASA, ABC time in 2026] = 0.24 x [Non-GB observation time in 2026]
    [SAAO time in 2026] = 0.28 x [Non-GB observation time in 2026]
    
- 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 1818:35:49 940:40:38 877:55:10 245:49:02 210:42:02 210:42:02 210:42:02 04:24:39
Observed 63:51:37
(3.51%)		 01:33:25
(0.17%)		 62:18:12
(7.10%)		 13:01:21
(5.30%)		 15:32:54
(7.38%)		 20:42:34
(9.83%)		 13:01:21
(6.18%)		 04:24:39
(N/A)
Remaining 1754:44:11
(96.49%)		 939:07:12
(99.83%)		 815:36:58
(92.90%)		 232:47:41
(94.70%)		 195:09:08
(92.62%)		 189:59:27
(90.17%)		 197:40:40
(93.82%)		 00:00:00
(N/A)











Camera status (2026/02/01)



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