PRIME Observation Log 2025/12/21

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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: 2025/12/21
Local observer:
Remote observer: Togo
Weather: clear
Comment:
Detector Temperature: 117.29909 +- 0.11487 K
ImageAcquisitionErrors occurred 7 times @
2025-12-21 21:36:43 SAT
2025-12-21 21:56:56 SAT
2025-12-21 22:07:02 SAT
2025-12-21 22:20:38 SAT
2025-12-21 23:06:55 SAT
2025-12-21 23:13:42 SAT
2025-12-21 23:19:22 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:09:00
Morning 05:01:18
Science Observation
(Sun altitude < -10°)
Start 20:34:47
End 04:35:31
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 06:12:46 08:00:44 0.775
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 06:12:46 08:00:44 0.775


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.)
NASA 2781 02:12:33 04:30:18 0.490
OU 379 00:18:03 00:49:16 0.367
SAAO 271 00:12:55 00:26:35 0.486
ABC 271 00:12:55 00:26:35 0.486


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
ToO 2510 01:59:38 04:03:42 0.491
offset_all_sky_grid 1192 00:56:49 02:09:04 0.440


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
no_grid_test 36 00:01:42 00:18:32 0.093
no_grid 990 00:47:11 01:15:52 0.622
field16146_test 39 00:01:51 00:20:38 0.090
field16146 1445 01:08:52 02:08:38 0.535
offset_field16459_test 4 00:00:11 00:01:38 0.116
offset_field16459 40 00:01:54 00:03:50 0.497
offset_field16460 40 00:01:54 00:03:50 0.497
offset_field16461 40 00:01:54 00:03:52 0.491
offset_field16462 40 00:01:54 00:03:52 0.491
offset_field16463 40 00:01:54 00:03:52 0.491
offset_field16464 40 00:01:54 00:03:50 0.497
offset_field16465 40 00:01:54 00:03:47 0.503
offset_field16466 40 00:01:54 00:03:50 0.497
offset_field16467 40 00:01:54 00:03:47 0.503
offset_field16468 40 00:01:54 00:03:52 0.491
offset_field16469 40 00:01:54 00:03:52 0.491
offset_field16470 40 00:01:54 00:03:55 0.485
offset_field16471 40 00:01:54 00:03:52 0.491
offset_field16472 40 00:01:54 00:03:52 0.491
offset_field16473 40 00:01:54 00:03:58 0.480
offset_field16474 40 00:01:54 00:03:52 0.491
offset_field16475 40 00:01:54 00:03:47 0.503
offset_field16476 40 00:01:54 00:03:47 0.503
offset_field16477 40 00:01:54 00:03:47 0.503
offset_field16478 40 00:01:54 00:03:52 0.491
offset_field16479 40 00:01:54 00:03:50 0.497
offset_field16480 40 00:01:54 00:03:55 0.485
offset_field16481 40 00:01:54 00:03:52 0.491
offset_field16482 40 00:01:54 00:03:55 0.485
offset_field16167 40 00:01:54 00:03:55 0.485
offset_field16171 40 00:01:54 00:03:50 0.497
offset_field16172 40 00:01:54 00:04:18 0.443
focustest_offset_field16172 72 00:03:25 00:14:20 0.239
focustest2_offset_field16172 36 00:01:42 00:08:20 0.206










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 103:55:40 169:37:32 0.613

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 2077:23:04 1046:02:21 1031:20:42 288:46:35 247:31:22 247:31:22 247:31:22 241:08:24
Observed 2037:12:55
(98.07%)		 1046:02:21
(100.00%)		 991:10:34
(96.11%)		 226:47:05
(78.53%)		 219:13:15
(88.57%)		 358:25:44
(144.81%)		 186:44:29
(75.44%)		 241:08:24
(N/A)
Remaining 40:10:08
(1.93%)		 00:00:00
(0.00%)		 40:10:08
(3.89%)		 61:59:30
(21.47%)		 28:18:07
(11.43%)		 -111:05:38
(0.00%)		 60:46:52
(24.56%)		 00:00:00
(N/A)











Camera status (2025/12/21)



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