PRIME Observation Log 2026/01/29

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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: 2026/01/29
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 111.49700 +- 0.05464 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:05:08
Morning 05:35:02
Science Observation
(Sun altitude < -10°)
Start 20:29:01
End 05:11:09
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 04:00:51
End 05:11:09


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 02:08:52 08:42:08 0.247
GB Time 00:00:00 01:10:17 0.000
Non-GB Time 02:08:52 07:31:50 0.285


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 2 00:00:05 00:00:35 0.160
SAAO 299 00:14:15 00:32:13 0.442
OU 299 00:14:15 00:32:13 0.442
NASA 299 00:14:15 00:32:13 0.442
ABC 299 00:14:15 00:32:13 0.442


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
test 2 00:00:05 00:00:35 0.160
all_sky_grid 8 00:00:22 00:03:30 0.109
offset_all_sky_grid 1188 00:56:37 02:05:21 0.452


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
test 2 00:00:05 00:00:35 0.160
field15897_test 8 00:00:22 00:03:30 0.109
offset_field15849_test 28 00:01:20 00:07:10 0.186
offset_field15849 40 00:01:54 00:03:55 0.485
offset_field15850 40 00:01:54 00:03:50 0.497
offset_field15851 40 00:01:54 00:03:50 0.497
offset_field15852 40 00:01:54 00:03:52 0.491
offset_field15853 40 00:01:54 00:03:50 0.497
offset_field15854 40 00:01:54 00:03:52 0.491
offset_field15855 40 00:01:54 00:03:55 0.485
offset_field15856 40 00:01:54 00:03:50 0.497
offset_field15857 40 00:01:54 00:03:52 0.491
offset_field15858 40 00:01:54 00:03:50 0.497
offset_field15859 40 00:01:54 00:03:50 0.497
offset_field15860 40 00:01:54 00:05:00 0.381
offset_field12079 40 00:01:54 00:03:50 0.497
offset_field12080 40 00:01:54 00:03:47 0.503
offset_field12081 40 00:01:54 00:03:47 0.503
offset_field12082 40 00:01:54 00:03:47 0.503
offset_field12083 40 00:01:54 00:03:50 0.497
offset_field12084 40 00:01:54 00:04:15 0.448
offset_field12085 40 00:01:54 00:03:52 0.491
offset_field12086 40 00:01:54 00:04:46 0.400
offset_field9715 40 00:01:54 00:03:50 0.497
offset_field9716 40 00:01:54 00:03:55 0.485
offset_field9717 40 00:01:54 00:03:52 0.491
offset_field9718 40 00:01:54 00:03:50 0.497
offset_field9719 40 00:01:54 00:07:28 0.255
offset_field9720 40 00:01:54 00:03:52 0.491
offset_field9721 40 00:01:54 00:03:52 0.491
offset_field9722 40 00:01:54 00:03:52 0.491
offset_field9723 40 00:01:54 00:04:08 0.460










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 40:18:42 242:02:03 0.167

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 1808:11:42 941:07:41 867:04:00 242:46:43 208:05:45 208:05:45 208:05:45 02:21:37
Observed 40:18:42
(2.23%)		 00:00:00
(0.00%)		 40:18:42
(4.65%)		 07:31:29
(3.10%)		 10:03:01
(4.83%)		 15:12:42
(7.31%)		 07:31:29
(3.62%)		 02:21:37
(N/A)
Remaining 1767:53:00
(97.77%)		 941:07:41
(100.00%)		 826:45:18
(95.35%)		 235:15:14
(96.90%)		 198:02:44
(95.17%)		 192:53:03
(92.69%)		 200:34:16
(96.38%)		 00:00:00
(N/A)











Camera status (2026/01/29)



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