PRIME Observation Log 2026/03/28

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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: 2026/03/28
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 114.49999 +- 0.00085 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:59:42
Morning 06:24:04
Science Observation
(Sun altitude < -10°)
Start 19:21:00
End 06:02:44
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 00:12:51
End 06:02:44


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 08:44:46 10:41:44 0.818
GB Time 05:31:11 05:49:53 0.947
Non-GB Time 03:13:35 04:51:50 0.663


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
SAAO 2776 02:12:19 03:13:35 0.684
GB 2948 02:20:31 05:31:11 0.424
CALIB 284 00:13:32 00:26:44 0.506


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
all_sky_grid 2776 02:12:19 03:13:35 0.684
Bulge 2804 02:13:39 05:13:23 0.426
SKY 144 00:06:51 00:17:47 0.386
TWILIGHT 284 00:13:32 00:26:44 0.506


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
field19038_test 12 00:00:34 00:05:54 0.097
field17744_test 20 00:00:57 00:13:28 0.071
field17744 684 00:32:36 00:49:37 0.657
field19038 684 00:32:36 00:39:41 0.822
field16543 684 00:32:36 00:41:19 0.789
field14345_test 8 00:00:22 00:02:48 0.136
field14345 684 00:32:36 00:40:45 0.800
GB82_test OH 36 00:01:42 00:29:59 0.057
GB63_test OJ 32 00:01:31 00:13:04 0.117
GB63_dither OJ 48 00:02:17 00:04:38 0.493
GB62_dither OJ 48 00:02:17 00:04:32 0.503
GB61_dither OJ 48 00:02:17 00:04:32 0.503
GB60_dither OJ 48 00:02:17 00:04:35 0.498
GB59_dither OJ 48 00:02:17 00:04:32 0.503
GB58_dither OJ 48 00:02:17 00:04:41 0.488
GCsky 144 00:06:51 00:17:47 0.386
GB76_dither OH 264 00:12:35 00:25:44 0.489
GB77_dither OH 264 00:12:35 00:25:50 0.487
GB78_dither OH 264 00:12:35 00:26:07 0.482
GB94_dither OH 264 00:12:35 00:25:58 0.484
GB111_dither OH 264 00:12:35 00:25:47 0.488
GB110_dither OH 264 00:12:35 00:25:55 0.485
GB109_dither OH 144 00:06:51 00:14:14 0.482
GB92_dither OH 72 00:03:25 00:07:05 0.484
GB93_dither OH 72 00:03:25 00:07:11 0.477
GB75_dither OH 120 00:05:43 00:11:49 0.484
GB112_dither OH 144 00:06:51 00:14:20 0.479
GB79_dither OH 120 00:05:43 00:12:37 0.453
GB60_dither OH 72 00:03:25 00:07:11 0.477
GB95_dither OH 48 00:02:17 00:04:43 0.484
GB113_dither OH 72 00:03:25 00:08:07 0.422
FLAT_test OH 4 00:00:11 00:02:45 0.069
FLAT OH 280 00:13:20 00:23:58 0.557










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 96:41:12 286:34:53 0.337

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 1738:11:03 927:35:45 810:35:17 226:57:53 194:32:28 194:32:28 194:32:28 26:32:42
Observed 251:53:36
(14.49%)		 90:13:36
(9.73%)		 161:39:59
(19.94%)		 65:10:49
(28.72%)		 30:52:21
(15.87%)		 37:15:59
(19.16%)		 28:20:48
(14.57%)		 26:32:42
(N/A)
Remaining 1486:17:27
(85.51%)		 837:22:08
(90.27%)		 648:55:18
(80.06%)		 161:47:03
(71.28%)		 163:40:06
(84.13%)		 157:16:28
(80.84%)		 166:11:39
(85.43%)		 00:00:00
(N/A)











Camera status (2026/03/28)



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