PRIME Observation Log 2026/02/24

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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: 2026/02/24
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 111.99987 +- 0.00112 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:40:19
Morning 05:59:47
Science Observation
(Sun altitude < -10°)
Start 20:02:30
End 05:37:36
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 02:18:39
End 05:37:36


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 00:49:44 09:35:05 0.087
GB Time 00:00:00 03:18:57 0.000
Non-GB Time 00:49:44 06:16:08 0.132


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 44 00:02:05 00:17:44 0.118
SAAO 67 00:03:11 00:12:26 0.257
OU 67 00:03:11 00:12:26 0.257
NASA 67 00:03:11 00:12:26 0.257
ABC 67 00:03:11 00:12:26 0.257


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 44 00:02:05 00:17:44 0.118
all_sky_grid 268 00:12:46 00:49:44 0.257


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test DY 4 00:00:11 00:13:38 0.014
FLAT OH 40 00:01:54 00:04:05 0.465
field15511_test 28 00:01:20 00:25:32 0.052
field15511 60 00:02:51 00:06:39 0.429
field15512 60 00:02:51 00:05:49 0.491
field15513 60 00:02:51 00:05:43 0.499
field15514 60 00:02:51 00:05:59 0.477










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 72:12:13 220:24:35 0.328

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 1777:03:02 930:17:37 846:45:25 237:05:31 203:13:18 203:13:18 203:13:18 19:23:23
Observed 128:07:16
(7.21%)		 18:57:14
(2.04%)		 109:10:02
(12.89%)		 29:57:40
(12.64%)		 25:23:51
(12.50%)		 30:56:10
(15.22%)		 22:52:19
(11.25%)		 19:23:23
(N/A)
Remaining 1648:55:46
(92.79%)		 911:20:23
(97.96%)		 737:35:23
(87.11%)		 207:07:50
(87.36%)		 177:49:26
(87.50%)		 172:17:07
(84.78%)		 180:20:58
(88.75%)		 00:00:00
(N/A)











Camera status (2026/02/24)



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