PRIME Observation Log 2025/04/10

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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: 2025/04/10
Local observer: Seiya Nakayama, Ryo Ogawa
Remote observer:
Weather: cloudy
Comment:
Detector Temperature: 114.00013 +- 0.00160 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:43:12
Morning 06:32:57
Science Observation
(Sun altitude < -10°)
Start 19:04:34
End 06:11:33
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 23:20:43
End 06:11:33


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 00:58:03 11:06:58 0.087
GB Time 00:00:00 06:50:49 0.000
Non-GB Time 00:58:03 04:16:08 0.227


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 176 00:08:23 00:19:13 0.436
ALLSKY 444 00:21:09 00:58:03 0.365
SAAO 111 00:05:17 00:14:30 0.365
OU 111 00:05:17 00:14:30 0.365
NASA 111 00:05:17 00:14:30 0.365
ABC 111 00:05:17 00:14:30 0.365


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
calibration 4 00:00:11 00:00:41 0.276
TWILIGHT 172 00:08:11 00:18:31 0.442
all_sky_grid 444 00:21:09 00:58:03 0.365


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
LSS_J 4 00:00:11 00:00:41 0.276
FLAT_test OH 12 00:00:34 00:02:29 0.230
FLAT OH 160 00:07:37 00:16:02 0.475
field9149_test 48 00:02:17 00:19:49 0.115
field9149 40 00:01:54 00:03:50 0.497
field9150 40 00:01:54 00:03:50 0.497
field9151 40 00:01:54 00:03:47 0.503
field9152 40 00:01:54 00:03:47 0.503
field9153 40 00:01:54 00:03:50 0.497
field9154 40 00:01:54 00:03:55 0.485
field9155 40 00:01:54 00:03:52 0.491
field9156 40 00:01:54 00:03:50 0.497
field9157 40 00:01:54 00:03:47 0.503
field9158 36 00:01:42 00:03:43 0.461










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 29:13:32 109:45:45 0.266

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 1760:37:42 897:00:23 863:37:19 241:48:50 207:16:09 207:16:09 207:16:09 113:28:48
Observed 345:41:30
(19.63%)		 101:53:48
(11.36%)		 243:47:42
(28.23%)		 29:46:01
(12.31%)		 59:37:50
(28.77%)		 128:30:23
(62.00%)		 25:53:26
(12.49%)		 113:28:48
(N/A)
Remaining 1414:56:11
(80.37%)		 795:06:34
(88.64%)		 619:49:37
(71.77%)		 212:02:49
(87.69%)		 147:38:18
(71.23%)		 78:45:46
(38.00%)		 181:22:42
(87.51%)		 00:00:00
(N/A)











Camera status (2025/04/10)