PRIME Observation Log 2025/12/17

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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: 2025/12/17
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 117.00006 +- 0.00114 K
ImageAcquisitionErrors occurred 1 times @
2025-12-17 21:04:04 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:06:48
Morning 04:59:29
Science Observation
(Sun altitude < -10°)
Start 20:32:34
End 04:33:43
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 04:49:06 08:01:09 0.601
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 04:49:06 08:01:09 0.601


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 00:10:47 0.530
NASA 1459 01:09:32 02:52:43 0.403
OU 239 00:11:23 00:54:09 0.210
SAAO 163 00:07:46 00:31:07 0.250
ABC 163 00:07:46 00:31:07 0.250


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 120 00:05:43 00:10:47 0.530
ToO 1296 01:01:46 02:21:35 0.436
offset_all_sky_grid 728 00:34:42 02:27:30 0.235


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OJ 120 00:05:43 00:10:47 0.530
field9850_test 20 00:00:57 00:04:19 0.221
field9850 40 00:01:54 00:05:19 0.358
field10742 40 00:01:54 00:04:04 0.469
field10743 40 00:01:54 00:03:55 0.485
field11045 40 00:01:54 00:04:15 0.448
field11048 80 00:03:48 00:07:40 0.497
field11653 76 00:03:37 00:10:22 0.349
field12268 40 00:01:54 00:03:52 0.491
field9861 40 00:01:54 00:04:04 0.469
field10157 40 00:01:54 00:04:26 0.429
field11355 40 00:01:54 00:04:18 0.443
field11057 40 00:01:54 00:04:09 0.458
field12281 40 00:01:54 00:04:10 0.457
field13211 40 00:01:54 00:05:05 0.375
field16046 40 00:01:54 00:04:09 0.458
field16048 40 00:01:54 00:04:34 0.416
field15731 40 00:01:54 00:04:09 0.458
field13842 40 00:01:54 00:03:52 0.491
field11983 40 00:01:54 00:04:01 0.474
field15107 40 00:01:54 00:03:52 0.491
field13537 40 00:01:54 00:03:55 0.485
field13859 40 00:01:54 00:03:55 0.485
field15121 40 00:01:54 00:04:20 0.438
field16066 40 00:01:54 00:03:55 0.485
field16069 40 00:01:54 00:03:52 0.491
field16075 40 00:01:54 00:04:12 0.453
field17660 40 00:01:54 00:04:20 0.438
field22812 40 00:01:54 00:04:40 0.408
field22245 40 00:01:54 00:04:06 0.463
field21367 40 00:01:54 00:03:58 0.480
field22828 40 00:01:54 00:05:30 0.346
offset_field16117_test 88 00:04:11 01:05:14 0.064
focus_test 76 00:03:37 00:23:01 0.157
offset_field16483_test 4 00:00:11 00:01:27 0.131
offset_field16483 40 00:01:54 00:03:52 0.491
offset_field16484 40 00:01:54 00:04:01 0.474
offset_field16485 40 00:01:54 00:04:04 0.469
offset_field16486 40 00:01:54 00:04:01 0.474
offset_field16487 40 00:01:54 00:04:04 0.469
offset_field16488 40 00:01:54 00:04:04 0.469
offset_field16489 40 00:01:54 00:03:52 0.491
offset_field16490 40 00:01:54 00:04:04 0.469
offset_field16491 40 00:01:54 00:04:32 0.420
offset_field16492 40 00:01:54 00:04:26 0.429
offset_field15861 40 00:01:54 00:04:20 0.438
offset_field16168 40 00:01:54 00:03:55 0.485
offset_field16169 40 00:01:54 00:04:04 0.469
offset_field16170 40 00:01:54 00:04:22 0.436










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 85:43:13 137:34:15 0.623

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 2075:12:15 1046:02:21 1029:09:53 288:09:58 246:59:58 246:59:58 246:59:58 240:21:44
Observed 2019:00:28
(97.29%)		 1046:02:21
(100.00%)		 972:58:07
(94.54%)		 223:31:42
(77.57%)		 215:35:11
(87.28%)		 350:22:05
(141.85%)		 183:29:07
(74.29%)		 240:21:44
(N/A)
Remaining 56:11:46
(2.71%)		 00:00:00
(0.00%)		 56:11:46
(5.46%)		 64:38:15
(22.43%)		 31:24:46
(12.72%)		 -104:37:53
(0.00%)		 63:30:51
(25.71%)		 00:00:00
(N/A)











Camera status (2025/12/17)



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