PRIME Observation Log 2025/10/11

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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: 2025/10/11
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 116.00261 +- 0.00512 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:08:29
Morning 05:37:41
Science Observation
(Sun altitude < -10°)
Start 19:30:27
End 05:15:44
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:30:27
End 22:46:34


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 00:00:00 09:45:17 0.000
GB Time 00:00:00 03:16:07 0.000
Non-GB Time 00:00:00 06:29:09 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
CALIB 2444 01:56:29 02:20:34 0.829


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
calibration 2444 01:56:29 02:20:34 0.829


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
reset 40 00:01:54 00:04:15 0.448
Dark 525 00:25:01 00:25:31 0.980
superbias 120 00:05:43 00:08:54 0.642
LSS_H 80 00:03:48 00:07:37 0.500
NLC_H 351 00:16:43 00:17:21 0.964
LSS_J 80 00:03:48 00:08:30 0.448
NLC_J 456 00:21:44 00:22:25 0.970
LSS_Z 80 00:03:48 00:07:16 0.524
NLC_Z 211 00:10:03 00:10:37 0.946
LSS_Y 80 00:03:48 00:07:19 0.520
NLC_Y 421 00:20:04 00:20:44 0.967










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 230:19:15 357:22:01 0.644
Sep 190:24:38 318:36:32 0.598
Oct 59:00:49 109:13:21 0.540

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 1984:01:39 1043:08:43 940:52:56 263:26:49 225:48:42 225:48:42 225:48:42 205:33:27
Observed 1636:16:37
(82.47%)		 1010:54:45
(96.91%)		 625:21:51
(66.47%)		 148:40:42
(56.44%)		 139:33:29
(61.80%)		 232:55:21
(103.15%)		 104:12:18
(46.15%)		 205:33:27
(N/A)
Remaining 347:45:02
(17.53%)		 32:13:57
(3.09%)		 315:31:04
(33.53%)		 114:46:07
(43.56%)		 86:15:12
(38.20%)		 -8:53:21
(0.00%)		 121:36:23
(53.85%)		 00:00:00
(N/A)











Camera status (2025/10/11)



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