PRIME Observation Log 2025/12/09

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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: 2025/12/09
Local observer:
Remote observer: Ryo
Weather: clear->cloudy
Comment:
Detector Temperature: 117.00000 +- 0.00086 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:01:18
Morning 04:57:19
Science Observation
(Sun altitude < -10°)
Start 20:26:52
End 04:31:45
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 03:27:18 08:04:52 0.428
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 03:27:18 08:04:52 0.428


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 292 00:13:55 00:41:28 0.336
SAAO 463 00:22:04 00:51:49 0.426
OU 463 00:22:04 00:51:49 0.426
NASA 463 00:22:04 00:51:49 0.426
ABC 463 00:22:04 00:51:49 0.426


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 292 00:13:55 00:41:28 0.336
offset_all_sky_grid 1852 01:28:16 03:27:18 0.426


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test OH 12 00:00:34 00:12:06 0.047
FLAT OH 280 00:13:20 00:29:21 0.455
offset_field13863_test 92 00:04:23 00:19:24 0.226
offset_field13863 40 00:01:54 00:04:43 0.404
offset_field13864 40 00:01:54 00:04:06 0.463
offset_field13865 40 00:01:54 00:04:01 0.474
offset_field13866 40 00:01:54 00:04:06 0.463
offset_field13867 40 00:01:54 00:03:58 0.480
offset_field13868 40 00:01:54 00:04:46 0.400
offset_field13869 40 00:01:54 00:03:52 0.491
offset_field13870 40 00:01:54 00:03:50 0.497
offset_field13871 40 00:01:54 00:04:04 0.469
offset_field13872 40 00:01:54 00:04:21 0.438
offset_field13873 40 00:01:54 00:04:14 0.449
offset_field13874 40 00:01:54 00:04:34 0.416
offset_field13875 40 00:01:54 00:04:06 0.463
offset_field13876 40 00:01:54 00:04:09 0.458
offset_field13877 40 00:01:54 00:04:06 0.463
offset_field13878 40 00:01:54 00:04:06 0.463
offset_field13879 40 00:01:54 00:04:07 0.463
offset_field13880 40 00:01:54 00:04:09 0.458
offset_field13881 40 00:01:54 00:04:59 0.381
offset_field13882 40 00:01:54 00:04:06 0.463
offset_field13883 40 00:01:54 00:03:52 0.491
offset_field13884 40 00:01:54 00:04:06 0.463
offset_field13885 40 00:01:54 00:03:58 0.480
offset_field13886 40 00:01:54 00:05:25 0.352
offset_field8519 40 00:01:54 00:04:57 0.385
offset_field12052 40 00:01:54 00:05:50 0.326
offset_field12052_test 40 00:01:54 00:05:33 0.343
offset_field12053 40 00:01:54 00:03:47 0.503
offset_field12054 40 00:01:54 00:04:18 0.443
offset_field12055 40 00:01:54 00:03:50 0.497
offset_field12056 40 00:01:54 00:03:53 0.491
offset_field12057 40 00:01:54 00:04:03 0.469
offset_field12058 40 00:01:54 00:03:50 0.497
offset_field12059 40 00:01:54 00:04:15 0.448
offset_field12060 40 00:01:54 00:04:29 0.425
offset_field12061 40 00:01:54 00:04:18 0.443
offset_field12359 40 00:01:54 00:04:03 0.469
offset_field12360 40 00:01:54 00:04:04 0.469
offset_field12361 40 00:01:54 00:03:50 0.497
offset_field12362 40 00:01:54 00:04:06 0.463
offset_field12363 40 00:01:54 00:03:47 0.503
offset_field12364 40 00:01:54 00:03:47 0.503
offset_field12365 40 00:01:54 00:04:06 0.463
offset_field12366 40 00:01:54 00:05:02 0.379










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 43:33:42 73:14:28 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 2065:12:37 1046:02:21 1019:10:15 285:22:04 244:36:03 244:36:03 244:36:03 236:23:56
Observed 1976:50:57
(95.72%)		 1046:02:21
(100.00%)		 930:48:36
(91.33%)		 216:31:06
(75.87%)		 207:56:15
(85.01%)		 329:52:42
(134.86%)		 176:28:31
(72.15%)		 236:23:56
(N/A)
Remaining 88:21:39
(4.28%)		 00:00:00
(0.00%)		 88:21:39
(8.67%)		 68:50:57
(24.13%)		 36:39:47
(14.99%)		 -86:43:22
(0.00%)		 68:07:32
(27.85%)		 00:00:00
(N/A)











Camera status (2025/12/09)



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