PRIME Observation Log 2025/08/21

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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: 2025/08/21
Local observer: Asahi
Remote observer:
Weather: clear, humid, windy
Comment:
Detector Temperature: 113.99992 +- 0.00190 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:35:50
Morning 06:43:12
Science Observation
(Sun altitude < -10°)
Start 18:57:26
End 06:21:38
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 18:57:26
End 02:07:06


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 03:01:27 11:24:11 0.265
GB Time 01:13:42 07:09:40 0.172
Non-GB Time 01:47:44 04:14:31 0.423


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
NASA 872 00:41:33 01:47:44 0.386
GB 596 00:28:24 01:13:42 0.385
CALIB 906 00:43:11 01:28:41 0.487


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
ToO 872 00:41:33 01:47:44 0.386
Bulge 596 00:28:24 01:13:42 0.385
calibration 906 00:43:11 01:28:41 0.487


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
no_grid_test 43 00:02:02 00:32:07 0.064
no_grid 829 00:39:30 01:15:36 0.523
GB107_dither_test OH 20 00:00:57 00:10:48 0.088
GB107_dither OH 24 00:01:08 00:02:38 0.432
GB90_dither OH 24 00:01:08 00:02:35 0.440
GB73_dither OH 24 00:01:08 00:02:30 0.456
GB72_dither OH 24 00:01:08 00:03:37 0.315
GB76_dither OH 48 00:02:17 00:05:20 0.429
GB77_dither OH 48 00:02:17 00:05:06 0.449
GB78_dither OH 48 00:02:17 00:05:17 0.432
GB94_dither OH 48 00:02:17 00:04:55 0.465
GB111_dither OH 48 00:02:17 00:05:03 0.452
GB110_dither OH 48 00:02:17 00:05:19 0.429
GB109_dither OH 24 00:01:08 00:02:36 0.439
GB108_dither OH 24 00:01:08 00:02:21 0.484
GB91_dither OH 24 00:01:08 00:02:35 0.440
GB74_dither OH 24 00:01:08 00:02:38 0.432
GB92_dither OH 24 00:01:08 00:02:29 0.458
GB93_dither OH 24 00:01:08 00:02:44 0.416
GB75_dither OH 24 00:01:08 00:02:24 0.474
GB112_dither OH 24 00:01:08 00:02:35 0.443
Dark 726 00:34:36 01:14:28 0.465
reset 40 00:01:54 00:03:52 0.491
superbias 140 00:06:40 00:10:20 0.645










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 154:32:18 244:54:33 0.631

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 1928:57:53 1001:16:10 927:41:43 259:45:17 222:38:48 222:38:48 222:38:48 176:15:17
Observed 1311:04:10
(67.97%)		 836:37:59
(83.56%)		 474:26:10
(51.14%)		 102:46:47
(39.57%)		 106:59:15
(48.05%)		 193:02:04
(86.70%)		 71:38:03
(32.17%)		 176:15:17
(N/A)
Remaining 617:53:43
(32.03%)		 164:38:10
(16.44%)		 453:15:33
(48.86%)		 156:58:29
(60.43%)		 115:39:33
(51.95%)		 29:36:44
(13.30%)		 151:00:45
(67.83%)		 00:00:00
(N/A)











Camera status (2025/08/21)



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