PRIME Observation Log 2025/12/25

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Raw Log (Time is in SA time)
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Observation Log (Time is in UT)

Date: 2025/12/25
Local observer:
Remote observer: Takuto
Weather: clear
Comment:
Detector Temperature: 117.00018 +- 0.00165 K
ImageAcquisitionErrors occurred 1 times @
2025-12-25 23:44:46 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:10:45
Morning 05:03:34
Science Observation
(Sun altitude < -10°)
Start 20:36:30
End 04:37:49
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 07:29:04 08:01:18 0.933
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 07:29:04 08:01:18 0.933


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 120 00:05:43 00:12:46 0.448
OU 928 00:44:14 02:40:58 0.275
SAAO 812 00:38:42 01:36:02 0.403
NASA 812 00:38:42 01:36:02 0.403
ABC 812 00:38:42 01:36:02 0.403


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 120 00:05:43 00:12:46 0.448
offset_all_sky_grid 3364 02:40:21 07:29:04 0.357


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OH 120 00:05:43 00:12:46 0.448
offset_field9912_test 40 00:01:54 00:25:30 0.075
offset_field9912 56 00:02:40 00:16:16 0.164
offset_field9913 40 00:01:54 00:03:52 0.491
offset_field9914 40 00:01:54 00:04:04 0.469
offset_field9915 40 00:01:54 00:03:52 0.491
offset_field9916 40 00:01:54 00:04:09 0.458
offset_field9917 40 00:01:54 00:04:04 0.469
offset_field9918 40 00:01:54 00:04:34 0.416
offset_field9919 40 00:01:54 00:03:52 0.491
offset_field9920 40 00:01:54 00:04:18 0.443
offset_field9921 40 00:01:54 00:04:09 0.458
offset_field9922 40 00:01:54 00:03:52 0.491
offset_field9923 40 00:01:54 00:04:09 0.458
offset_field9924 40 00:01:54 00:03:55 0.485
offset_field9925 40 00:01:54 00:05:45 0.331
offset_field4484 40 00:01:54 00:04:12 0.453
offset_field4485 40 00:01:54 00:04:09 0.458
offset_field5401 40 00:01:54 00:03:50 0.497
offset_field5402 40 00:01:54 00:04:04 0.469
offset_field5403 40 00:01:54 00:04:06 0.463
offset_field5641 40 00:01:54 00:03:50 0.497
offset_field5642 40 00:01:54 00:08:05 0.236
offset_field5642_test 116 00:05:31 01:04:56 0.085
offset_field5643 40 00:01:54 00:04:04 0.469
offset_field5644 40 00:01:54 00:04:23 0.434
offset_field5645 52 00:02:28 00:07:41 0.323
offset_field5646 40 00:01:54 00:04:20 0.438
offset_field5647 40 00:01:54 00:04:09 0.458
offset_field5648 40 00:01:54 00:03:50 0.497
offset_field5649 40 00:01:54 00:04:04 0.469
offset_field5650 40 00:01:54 00:04:04 0.469
offset_field5651 40 00:01:54 00:04:04 0.469
offset_field5652 40 00:01:54 00:04:06 0.463
offset_field5653 40 00:01:54 00:04:46 0.400
offset_field5887 40 00:01:54 00:04:10 0.456
offset_field5888 40 00:01:54 00:04:02 0.471
offset_field5889 40 00:01:54 00:04:37 0.412
offset_field5890 40 00:01:54 00:04:09 0.458
offset_field5891 40 00:01:54 00:04:23 0.434
offset_field5892 40 00:01:54 00:03:55 0.485
offset_field5893 40 00:01:54 00:04:20 0.438
offset_field5894 40 00:01:54 00:04:23 0.434
offset_field5895 40 00:01:54 00:03:58 0.479
offset_field5896 40 00:01:54 00:04:34 0.416
offset_field5897 40 00:01:54 00:04:06 0.463
offset_field5898 40 00:01:54 00:04:09 0.458
offset_field5899 40 00:01:54 00:04:06 0.463
offset_field5900 40 00:01:54 00:03:52 0.491
offset_field5901 40 00:01:54 00:04:20 0.438
offset_field5902 40 00:01:54 00:04:09 0.458
offset_field5903 40 00:01:54 00:04:46 0.400
offset_field5904 40 00:01:54 00:05:58 0.319
offset_field5905 40 00:01:54 00:04:12 0.453
offset_field5906 40 00:01:54 00:04:23 0.434
offset_field5907 40 00:01:54 00:04:06 0.463
offset_field5908 40 00:01:54 00:04:06 0.463
offset_field5909 40 00:01:54 00:04:06 0.463
offset_field5910 40 00:01:54 00:03:52 0.491
offset_field5911 40 00:01:54 00:04:04 0.469
offset_field5912 40 00:01:54 00:04:06 0.464
offset_field5913 40 00:01:54 00:04:18 0.443
offset_field5914 40 00:01:54 00:04:04 0.469
offset_field5915 60 00:02:51 00:11:33 0.248
offset_field5916 40 00:01:54 00:04:23 0.434
offset_field5917 40 00:01:54 00:04:23 0.434
offset_field5918 40 00:01:54 00:04:01 0.474
offset_field5919 40 00:01:54 00:04:09 0.458
offset_field5920 40 00:01:54 00:03:58 0.480
offset_field5921 40 00:01:54 00:04:06 0.463
offset_field5922 40 00:01:54 00:03:52 0.491
offset_field5923 40 00:01:54 00:04:06 0.463
offset_field5924 40 00:01:54 00:03:52 0.491
offset_field5925 40 00:01:54 00:04:09 0.458
offset_field5926 40 00:01:54 00:03:58 0.480
offset_field5927 40 00:01:54 00:04:07 0.463
offset_field5928 40 00:01:54 00:04:23 0.434
offset_field5929 40 00:01:54 00:04:04 0.469
offset_field5930 40 00:01:54 00:04:06 0.463
offset_field5931 40 00:01:54 00:04:20 0.438
offset_field5932 40 00:01:54 00:04:06 0.463
offset_field5933 40 00:01:54 00:04:25 0.431










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 119:58:29 201:41:37 0.595

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 2077:23:51 1046:02:21 1031:21:29 288:46:49 247:31:33 247:31:33 247:31:33 241:49:07
Observed 2053:15:45
(98.84%)		 1046:02:21
(100.00%)		 1007:13:24
(97.66%)		 229:31:41
(79.48%)		 223:02:47
(90.11%)		 365:09:49
(147.53%)		 189:29:06
(76.55%)		 241:49:07
(N/A)
Remaining 24:08:05
(1.16%)		 00:00:00
(0.00%)		 24:08:05
(2.34%)		 59:15:07
(20.52%)		 24:28:46
(9.89%)		 -118:21:45
(0.00%)		 58:02:27
(23.45%)		 00:00:00
(N/A)











Camera status (2025/12/25)



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