PRIME Observation Log 2025/12/04

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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: 2025/12/04
Local observer:
Remote observer: ryusei
Weather: cloudy
Comment:
Detector Temperature: 117.00017 +- 0.00196 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:57:15
Morning 04:57:00
Science Observation
(Sun altitude < -10°)
Start 20:22:37
End 04:31:39
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start --:--:--
End --:--:--


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 02:31:24 08:09:02 0.310
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 02:31:24 08:09:02 0.310


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 64 00:03:03 00:19:42 0.155
SAAO 346 00:16:29 00:37:51 0.436
OU 346 00:16:29 00:37:51 0.436
NASA 346 00:16:29 00:37:51 0.436
ABC 346 00:16:29 00:37:51 0.436


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 60 00:02:51 00:19:00 0.150
offset_all_sky_grid 1384 01:05:58 02:31:24 0.436


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
setting_test 4 00:00:11 00:00:41 0.276
FLAT OJ 52 00:02:28 00:14:56 0.166
FLAT_test OJ 8 00:00:22 00:04:04 0.094
offset_field16381_test 24 00:01:08 00:13:43 0.083
offset_field16381 40 00:01:54 00:03:47 0.502
offset_field16382 40 00:01:54 00:04:06 0.464
offset_field16383 40 00:01:54 00:03:50 0.497
offset_field16384 40 00:01:54 00:03:47 0.503
offset_field16385 40 00:01:54 00:03:52 0.491
offset_field16386 40 00:01:54 00:03:50 0.497
offset_field16387 40 00:01:54 00:03:52 0.491
offset_field16388 40 00:01:54 00:03:55 0.485
offset_field16389 40 00:01:54 00:03:50 0.497
offset_field16390 40 00:01:54 00:03:50 0.497
offset_field16391 40 00:01:54 00:03:47 0.503
offset_field16392 40 00:01:54 00:03:47 0.503
offset_field16393 40 00:01:54 00:03:47 0.503
offset_field16394 40 00:01:54 00:03:50 0.497
offset_field16395 40 00:01:54 00:03:50 0.497
offset_field16396 40 00:01:54 00:03:50 0.497
offset_field16397 40 00:01:54 00:03:55 0.485
offset_field16398 40 00:01:54 00:03:52 0.491
offset_field16399 40 00:01:54 00:03:50 0.497
offset_field16400 40 00:01:54 00:07:51 0.243
offset_field16401 40 00:01:54 00:03:50 0.497
offset_field16402 40 00:01:54 00:03:50 0.497
offset_field16403 40 00:01:54 00:03:52 0.491
offset_field16404 40 00:01:54 00:05:14 0.364
offset_field16090 40 00:01:54 00:03:55 0.485
offset_field16091 40 00:01:54 00:03:52 0.491
offset_field16092 40 00:01:54 00:03:52 0.491
offset_field16093 40 00:01:54 00:04:51 0.392
offset_field8799 40 00:01:54 00:03:52 0.491
offset_field9084 40 00:01:54 00:03:50 0.497
offset_field9085 40 00:01:54 00:03:50 0.497
offset_field9086 40 00:01:54 00:03:50 0.497
offset_field9371 40 00:01:54 00:03:47 0.503
offset_field9372 40 00:01:54 00:04:05 0.465










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 183:24:57 296:59:20 0.618
Nov 172:36:33 257:46:16 0.670
Dec 21:37:43 32:42:18 0.661

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 2063:32:44 1046:02:21 1017:30:22 284:54:06 244:12:05 244:12:05 244:12:05 234:12:20
Observed 1954:54:59
(94.74%)		 1046:02:21
(100.00%)		 908:52:37
(89.32%)		 211:02:06
(74.07%)		 202:27:16
(82.90%)		 324:23:42
(132.84%)		 170:59:31
(70.02%)		 234:12:20
(N/A)
Remaining 108:37:44
(5.26%)		 00:00:00
(0.00%)		 108:37:44
(10.68%)		 73:51:59
(25.93%)		 41:44:49
(17.10%)		 -81:48:23
(0.00%)		 73:12:33
(29.98%)		 00:00:00
(N/A)











Camera status (2025/12/04)



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