PRIME Observation Log 2026/02/05

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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: 2026/02/05
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 112.00070 +- 0.00361 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:59:46
Morning 05:42:04
Science Observation
(Sun altitude < -10°)
Start 20:23:09
End 05:18:41
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 03:33:20
End 05:18:41


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 02:03:04 08:55:32 0.230
GB Time 00:00:00 01:45:21 0.000
Non-GB Time 02:03:04 07:10:11 0.286


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.)
SAAO 964 00:45:57 01:35:26 0.481
CALIB 3292 02:36:55 03:49:28 0.684
OU 92 00:04:23 00:09:12 0.476
NASA 92 00:04:23 00:09:12 0.476
ABC 92 00:04:23 00:09:12 0.476


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
all_sky_grid 1240 00:59:06 02:03:04 0.480
calibration 3292 02:36:55 03:49:28 0.684


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
field1693_test 46 00:02:11 00:06:18 0.347
field1693 684 00:32:36 00:48:44 0.669
field380_test 28 00:01:20 00:19:47 0.067
field380 114 00:05:26 00:11:22 0.478
field6918_test 8 00:00:22 00:02:09 0.177
field6918 60 00:02:51 00:05:49 0.491
field6919 60 00:02:51 00:05:43 0.499
field6920 60 00:02:51 00:05:43 0.499
field6921 60 00:02:51 00:05:43 0.499
field6922 60 00:02:51 00:05:40 0.503
field6923 60 00:02:51 00:05:59 0.477
LSS_H 76 00:03:37 00:08:13 0.440
NLC_H 211 00:10:03 00:10:35 0.950
reset 180 00:08:34 00:37:22 0.230
LSS_J 80 00:03:48 00:11:21 0.336
NLC_J 421 00:20:04 00:20:44 0.967
LSS_Y 80 00:03:48 00:08:02 0.474
NLC_Y 421 00:20:04 00:20:44 0.967
LSS_Z 80 00:03:48 00:12:31 0.304
NLC_Z 421 00:20:04 00:20:44 0.967
superbias 480 00:22:52 00:37:45 0.606
Dark 842 00:40:08 00:41:21 0.970










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 16:37:57 44:18:11 0.375

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 1809:31:59 938:48:26 870:43:32 243:48:11 208:58:27 208:58:27 208:58:27 13:34:12
Observed 72:33:00
(4.01%)		 02:56:56
(0.31%)		 69:36:04
(7.99%)		 17:47:07
(7.29%)		 16:23:36
(7.84%)		 21:33:16
(10.31%)		 13:52:03
(6.64%)		 13:34:12
(N/A)
Remaining 1736:58:58
(95.99%)		 935:51:30
(99.69%)		 801:07:28
(92.01%)		 226:01:04
(92.71%)		 192:34:50
(92.16%)		 187:25:10
(89.69%)		 195:06:23
(93.36%)		 00:00:00
(N/A)











Camera status (2026/02/05)



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