PRIME Observation Log 2026/03/21

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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: 2026/03/21
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 114.50024 +- 0.00169 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:08:46
Morning 06:19:12
Science Observation
(Sun altitude < -10°)
Start 19:30:08
End 05:57:49
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 00:40:22
End 05:57:49


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 05:11:21 10:27:41 0.496
GB Time 00:20:53 05:17:27 0.066
Non-GB Time 04:50:27 05:10:14 0.936


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 88 00:04:11 00:14:26 0.291
GB 168 00:08:00 00:20:53 0.383
SAAO 654 00:31:10 01:12:36 0.429
OU 654 00:31:10 01:12:36 0.429
NASA 654 00:31:10 01:12:36 0.429
ABC 654 00:31:10 01:12:36 0.429


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 88 00:04:11 00:14:26 0.291
all_sky_grid 2616 02:04:41 04:50:27 0.429
Bulge 168 00:08:00 00:20:53 0.383


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
test ZY 8 00:00:22 00:07:06 0.054
FLAT OH 80 00:03:48 00:07:19 0.520
field4290_test 36 00:01:42 00:23:27 0.073
field4290 60 00:02:51 00:05:46 0.495
field4291 60 00:02:51 00:05:46 0.495
field4292 60 00:02:51 00:05:46 0.495
field4293 60 00:02:51 00:05:43 0.499
field4294 60 00:02:51 00:05:43 0.499
field4295 60 00:02:51 00:05:46 0.495
field4296 60 00:02:51 00:05:46 0.495
field4297 60 00:02:51 00:05:49 0.491
field4298 60 00:02:51 00:05:43 0.499
field4299 60 00:02:51 00:05:40 0.503
field4300 60 00:02:51 00:05:43 0.499
field4301 60 00:02:51 00:11:28 0.249
field2720 60 00:02:51 00:05:46 0.495
field2721 60 00:02:51 00:05:43 0.499
field2722 60 00:02:51 00:05:43 0.499
field2723 60 00:02:51 00:05:49 0.491
field2724 60 00:02:51 00:05:46 0.495
field2725 60 00:02:51 00:05:43 0.499
field2726 60 00:02:51 00:05:43 0.499
field2727 60 00:02:51 00:05:46 0.495
field2728 60 00:02:51 00:05:46 0.495
field2729 60 00:02:51 00:05:43 0.499
field2730 60 00:02:51 00:05:43 0.499
field2731 60 00:02:51 00:05:43 0.499
field2732 60 00:02:51 00:05:43 0.499
field2733 60 00:02:51 00:05:43 0.499
field2734 60 00:02:51 00:05:46 0.495
field2735 60 00:02:51 00:05:49 0.491
field2736 60 00:02:51 00:08:45 0.326
field2555 60 00:02:51 00:05:46 0.495
field2556 60 00:02:51 00:05:46 0.495
field2557 60 00:02:51 00:05:43 0.499
field2558 60 00:02:51 00:05:43 0.499
field2559 60 00:02:51 00:05:46 0.495
field2560 60 00:02:51 00:05:46 0.495
field2561 60 00:02:51 00:05:43 0.499
field2562 60 00:02:51 00:05:43 0.499
field2563 60 00:02:51 00:05:49 0.491
field2564 60 00:02:51 00:05:46 0.495
field2565 60 00:02:51 00:10:49 0.264
field2757 60 00:02:51 00:05:49 0.491
field2577 60 00:02:51 00:05:43 0.499
field2578 60 00:02:51 00:11:25 0.250
GB82_test OH 24 00:01:08 00:06:45 0.169
GB82_dither OH 24 00:01:08 00:02:16 0.503
GB99_dither OH 24 00:01:08 00:02:19 0.493
GB116_dither OH 24 00:01:08 00:02:21 0.484
GB81_dither OH 24 00:01:08 00:02:16 0.503
GB98_dither OH 24 00:01:08 00:02:19 0.493
GB115_dither OH 24 00:01:08 00:02:35 0.443










Stats so far in 2026
Monthly observed fraction so far in 2026
Month Observed Time
(hh:mm:ss) 		Expected Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Jan 55:55:01 259:31:55 0.215
Feb 99:19:50 259:06:19 0.383
Mar 67:31:28 212:24:33 0.318

Observed time so far in 2026
- Total time of each institute is calculated by the following
    [All observation time in 2026] = [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 2026] = [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 2026] = [All observation time in 2026] - [GB observation time in 2026]
    
    [OU, NASA, ABC time in 2026] = 0.24 x [Non-GB observation time in 2026]
    [SAAO time in 2026] = 0.28 x [Non-GB observation time in 2026]
    
- 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 1746:06:28 927:39:52 818:26:36 229:09:50 196:25:35 196:25:35 196:25:35 25:18:22
Observed 222:43:51
(12.76%)		 70:41:40
(7.62%)		 152:02:10
(18.58%)		 55:33:01
(24.24%)		 30:52:21
(15.72%)		 37:15:59
(18.97%)		 28:20:48
(14.43%)		 25:18:22
(N/A)
Remaining 1523:22:37
(87.24%)		 856:58:11
(92.38%)		 666:24:25
(81.42%)		 173:36:49
(75.76%)		 165:33:13
(84.28%)		 159:09:35
(81.03%)		 168:04:46
(85.57%)		 00:00:00
(N/A)











Camera status (2026/03/21)



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