PRIME Observation Log 2025/12/18

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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: 2025/12/18
Local observer:
Remote observer: Takuto
Weather: clear
Comment:
Detector Temperature: 117.00009 +- 0.00124 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:07:24
Morning 04:59:54
Science Observation
(Sun altitude < -10°)
Start 20:33:10
End 04:34:07
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 08:03:53 08:00:57 1.006
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 08:03:53 08:00:57 1.006


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 364 00:17:21 00:43:11 0.402
SAAO 1144 00:54:31 02:00:58 0.451
OU 1144 00:54:31 02:00:58 0.451
NASA 1144 00:54:31 02:00:58 0.451
ABC 1144 00:54:31 02:00:58 0.451


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 364 00:17:21 00:43:11 0.402
offset_all_sky_grid 4576 03:38:07 08:03:53 0.451


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test OH 4 00:00:11 00:03:13 0.059
FLAT OH 360 00:17:09 00:39:57 0.429
offset_field15133_test 16 00:00:45 00:08:53 0.086
offset_field15133 40 00:01:54 00:03:52 0.491
offset_field15134 40 00:01:54 00:03:52 0.491
offset_field15135 40 00:01:54 00:03:50 0.497
offset_field15136 40 00:01:54 00:03:50 0.497
offset_field15137 40 00:01:54 00:03:52 0.491
offset_field15138 40 00:01:54 00:03:52 0.491
offset_field15139 40 00:01:54 00:03:52 0.491
offset_field15140 40 00:01:54 00:03:50 0.497
offset_field15141 40 00:01:54 00:03:47 0.503
offset_field15142 40 00:01:54 00:03:50 0.497
offset_field15143 40 00:01:54 00:03:50 0.497
offset_field15144 40 00:01:54 00:03:50 0.497
offset_field15145 40 00:01:54 00:03:52 0.491
offset_field15146 40 00:01:54 00:03:55 0.485
offset_field15147 40 00:01:54 00:05:08 0.371
offset_field5638 40 00:01:54 00:03:47 0.503
offset_field5639 40 00:01:54 00:03:47 0.503
offset_field5640 40 00:01:54 00:04:04 0.469
offset_field8243 40 00:01:54 00:03:47 0.503
offset_field8244 40 00:01:54 00:03:47 0.503
offset_field8245 40 00:01:54 00:03:47 0.503
offset_field8246 40 00:01:54 00:03:47 0.503
offset_field8247 40 00:01:54 00:03:47 0.503
offset_field8248 40 00:01:54 00:03:47 0.503
offset_field8249 40 00:01:54 00:03:47 0.503
offset_field8250 40 00:01:54 00:03:55 0.485
offset_field9090 40 00:01:54 00:03:50 0.497
offset_field9091 40 00:01:54 00:03:52 0.491
offset_field9670 40 00:01:54 00:03:50 0.497
offset_field9671 40 00:01:54 00:03:50 0.497
offset_field9672 40 00:01:54 00:03:47 0.503
offset_field9673 40 00:01:54 00:03:47 0.503
offset_field9674 40 00:01:54 00:03:50 0.497
offset_field9675 40 00:01:54 00:03:50 0.497
offset_field9676 40 00:01:54 00:04:01 0.474
offset_field9677 40 00:01:54 00:03:52 0.491
offset_field9678 40 00:01:54 00:03:58 0.480
offset_field9679 40 00:01:54 00:03:52 0.491
offset_field9680 40 00:01:54 00:03:50 0.497
offset_field9681 40 00:01:54 00:03:50 0.497
offset_field9682 40 00:01:54 00:03:50 0.497
offset_field9683 40 00:01:54 00:03:50 0.497
offset_field9684 40 00:01:54 00:03:47 0.503
offset_field9685 40 00:01:54 00:03:47 0.503
offset_field9686 40 00:01:54 00:03:47 0.503
offset_field9687 40 00:01:54 00:03:47 0.503
offset_field9688 40 00:01:54 00:03:47 0.503
offset_field9689 40 00:01:54 00:03:47 0.503
offset_field9690 40 00:01:54 00:03:47 0.503
offset_field9691 40 00:01:54 00:03:47 0.503
offset_field9692 40 00:01:54 00:03:50 0.497
offset_field9693 40 00:01:54 00:03:50 0.497
offset_field9694 40 00:01:54 00:10:28 0.182
b4_test 40 00:01:54 00:24:03 0.079
offset_field9695 40 00:01:54 00:03:50 0.497
offset_field9696 40 00:01:54 00:03:47 0.503
offset_field9697 40 00:01:54 00:03:50 0.497
offset_field9698 40 00:01:54 00:03:47 0.503
offset_field9699 40 00:01:54 00:03:47 0.503
offset_field9700 40 00:01:54 00:03:50 0.497
offset_field9701 40 00:01:54 00:03:50 0.497
offset_field9702 40 00:01:54 00:03:47 0.503
offset_field9703 40 00:01:54 00:03:50 0.497
offset_field9704 40 00:01:54 00:03:52 0.491
offset_field9705 40 00:01:54 00:03:52 0.491
offset_field9706 40 00:01:54 00:03:50 0.497
offset_field9707 40 00:01:54 00:04:26 0.429
offset_field9708 40 00:01:54 00:05:00 0.381
offset_field9709 40 00:01:54 00:03:50 0.497
offset_field9710 40 00:01:54 00:03:50 0.497
offset_field9711 40 00:01:54 00:03:50 0.497
offset_field9712 40 00:01:54 00:03:50 0.497
offset_field9713 40 00:01:54 00:04:04 0.469
offset_field9992 40 00:01:54 00:03:52 0.491
offset_field9993 40 00:01:54 00:03:52 0.491
offset_field9994 40 00:01:54 00:03:50 0.497
offset_field9995 40 00:01:54 00:03:50 0.497
offset_field9996 40 00:01:54 00:03:50 0.497
offset_field9997 40 00:01:54 00:03:50 0.497
offset_field9998 40 00:01:54 00:03:50 0.497
offset_field9999 40 00:01:54 00:03:50 0.497
offset_field10000 40 00:01:54 00:03:52 0.491
offset_field10001 40 00:01:54 00:03:52 0.491
offset_field10002 40 00:01:54 00:03:52 0.491
offset_field10003 40 00:01:54 00:03:47 0.503
offset_field10004 40 00:01:54 00:03:50 0.497
offset_field10005 40 00:01:54 00:03:47 0.504
offset_field10006 40 00:01:54 00:03:50 0.497
offset_field10007 40 00:01:54 00:03:50 0.497
offset_field10008 40 00:01:54 00:03:50 0.497
offset_field10009 40 00:01:54 00:03:58 0.480
offset_field10010 40 00:01:54 00:03:52 0.491
offset_field10011 40 00:01:54 00:03:50 0.497
offset_field10012 40 00:01:54 00:03:52 0.491
offset_field10013 40 00:01:54 00:03:50 0.497
offset_field10014 40 00:01:54 00:03:50 0.497
offset_field10015 40 00:01:54 00:03:55 0.485
offset_field10308 40 00:01:54 00:03:58 0.480
offset_field10604 40 00:01:54 00:04:06 0.463
offset_field10894 40 00:01:54 00:03:52 0.491
offset_field10895 40 00:01:54 00:03:52 0.491
offset_field10896 40 00:01:54 00:04:01 0.474
offset_field10897 40 00:01:54 00:03:52 0.491
offset_field10898 40 00:01:54 00:03:52 0.491
offset_field10899 40 00:01:54 00:04:01 0.474
offset_field10900 40 00:01:54 00:03:55 0.485
offset_field10901 40 00:01:54 00:05:02 0.378
offset_field11169 40 00:01:54 00:05:44 0.332
offset_field13659 40 00:01:54 00:03:58 0.480
offset_field13968 40 00:01:54 00:03:58 0.480
offset_field13969 40 00:01:54 00:03:55 0.485
offset_field13970 40 00:01:54 00:03:50 0.497
offset_field13971 40 00:01:54 00:04:01 0.474
offset_field13972 40 00:01:54 00:06:10 0.309










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 93:47:07 145:35:12 0.644

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 2079:15:40 1046:02:21 1033:13:19 289:18:07 247:58:23 247:58:23 247:58:23 241:04:55
Observed 2027:04:22
(97.49%)		 1046:02:21
(100.00%)		 981:02:01
(94.95%)		 225:32:41
(77.96%)		 217:36:09
(87.75%)		 352:23:04
(142.11%)		 185:30:05
(74.81%)		 241:04:55
(N/A)
Remaining 52:11:17
(2.51%)		 00:00:00
(0.00%)		 52:11:17
(5.05%)		 63:45:26
(22.04%)		 30:22:13
(12.25%)		 -105:35:20
(0.00%)		 62:28:17
(25.19%)		 00:00:00
(N/A)











Camera status (2025/12/18)



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