PRIME Observation Log 2025/12/24

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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: 2025/12/24
Local observer:
Remote observer: Takuto
Weather: clear
Comment:
Detector Temperature: 117.00002 +- 0.00076 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:10:21
Morning 05:02:58
Science Observation
(Sun altitude < -10°)
Start 20:36:07
End 04:37:12
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 03:42:57 08:01:04 0.463
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 03:42:57 08:01:04 0.463


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 124 00:05:54 00:17:18 0.342
SAAO 490 00:23:21 00:55:44 0.419
OU 490 00:23:21 00:55:44 0.419
NASA 490 00:23:21 00:55:44 0.419
ABC 490 00:23:21 00:55:44 0.419


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 124 00:05:54 00:17:18 0.342
offset_all_sky_grid 1960 01:33:25 03:42:57 0.419


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test OJ 4 00:00:11 00:04:09 0.046
FLAT OJ 120 00:05:43 00:13:08 0.435
offset_field11706_test 8 00:00:22 00:09:18 0.041
offset_field11706 40 00:01:54 00:03:52 0.491
offset_field11707 40 00:01:54 00:03:58 0.480
offset_field11708 40 00:01:54 00:03:55 0.485
offset_field11709 40 00:01:54 00:03:52 0.491
offset_field11710 40 00:01:54 00:03:52 0.491
offset_field11711 40 00:01:54 00:03:52 0.491
offset_field11712 40 00:01:54 00:03:50 0.497
offset_field11713 40 00:01:54 00:03:50 0.497
offset_field11714 40 00:01:54 00:03:52 0.491
offset_field11715 40 00:01:54 00:03:55 0.485
offset_field11716 40 00:01:54 00:03:52 0.491
offset_field11717 40 00:01:54 00:03:50 0.497
offset_field11718 40 00:01:54 00:05:14 0.364
offset_field4932 68 00:03:14 00:09:11 0.353
offset_field4932_test 52 00:02:28 00:26:50 0.092
offset_field4933 40 00:01:54 00:03:50 0.497
offset_field4706 40 00:01:54 00:03:47 0.503
offset_field4707 40 00:01:54 00:03:47 0.503
offset_field4708 40 00:01:54 00:03:47 0.503
offset_field4709 40 00:01:54 00:03:50 0.497
offset_field4934 40 00:01:54 00:03:47 0.503
offset_field4935 40 00:01:54 00:03:47 0.503
offset_field4936 40 00:01:54 00:03:47 0.503
offset_field4937 40 00:01:54 00:03:50 0.497
offset_field4938 40 00:01:54 00:03:55 0.485
offset_field4939 40 00:01:54 00:03:50 0.497
offset_field4940 40 00:01:54 00:03:50 0.497
offset_field4941 40 00:01:54 00:03:47 0.503
offset_field4942 40 00:01:54 00:03:47 0.503
offset_field4943 40 00:01:54 00:03:47 0.503
offset_field4944 40 00:01:54 00:03:52 0.491
offset_field5165 40 00:01:54 00:03:47 0.503
offset_field5166 40 00:01:54 00:03:47 0.503
offset_field5167 40 00:01:54 00:03:50 0.497
offset_field5168 40 00:01:54 00:03:52 0.491
offset_field5169 40 00:01:54 00:03:50 0.497
offset_field5170 40 00:01:54 00:03:50 0.497
offset_field5171 40 00:01:54 00:03:50 0.497
offset_field5172 40 00:01:54 00:03:50 0.497
offset_field5173 40 00:01:54 00:03:47 0.503
offset_field5174 40 00:01:54 00:03:47 0.503
offset_field5175 40 00:01:54 00:03:50 0.497
offset_field5176 40 00:01:54 00:03:50 0.497
offset_field5177 40 00:01:54 00:04:04 0.469
offset_field5178 40 00:01:54 00:03:50 0.497
offset_field5179 40 00:01:54 00:03:47 0.503
offset_field5180 40 00:01:54 00:03:47 0.503
offset_field5181 32 00:01:31 00:03:20 0.456










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 112:29:24 193:40:18 0.581

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 2073:55:25 1046:02:21 1027:53:04 287:48:27 246:41:32 246:41:32 246:41:32 241:36:21
Observed 2045:46:40
(98.64%)		 1046:02:21
(100.00%)		 999:44:19
(97.26%)		 227:55:39
(79.19%)		 220:21:48
(89.33%)		 363:33:47
(147.38%)		 187:53:04
(76.16%)		 241:36:21
(N/A)
Remaining 28:08:44
(1.36%)		 00:00:00
(0.00%)		 28:08:44
(2.74%)		 59:52:48
(20.81%)		 26:19:43
(10.67%)		 -117:07:46
(0.00%)		 58:48:28
(23.84%)		 00:00:00
(N/A)











Camera status (2025/12/24)



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