PRIME Observation Log 2026/03/22

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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: 2026/03/22
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 114.27072 +- 0.22575 K
ImageAcquisitionErrors occurred 1 times @
2026-03-23 02:48:38 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:07:28
Morning 06:19:55
Science Observation
(Sun altitude < -10°)
Start 19:28:49
End 05:58:32
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 00:36:26
End 05:58:32


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 03:24:19 10:29:43 0.324
GB Time 03:24:19 05:22:06 0.634
Non-GB Time 00:00:00 05:07:37 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB 1840 01:27:42 03:24:19 0.429
CALIB 220 00:10:29 00:19:24 0.540


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
Bulge 1792 01:25:25 03:18:53 0.429
SKY 48 00:02:17 00:05:25 0.421
TWILIGHT 220 00:10:29 00:19:24 0.540


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB76_dither_test OH 8 00:00:22 00:04:32 0.084
GCsky 48 00:02:17 00:05:25 0.421
GB76_dither OH 168 00:08:00 00:16:47 0.477
GB77_dither OH 168 00:08:00 00:17:38 0.454
GB78_dither OH 176 00:08:23 00:21:54 0.383
GB94_dither OH 168 00:08:00 00:17:40 0.453
GB111_dither OH 168 00:08:00 00:18:06 0.442
GB110_dither OH 168 00:08:00 00:17:26 0.459
GB109_dither OH 96 00:04:34 00:13:17 0.344
GB108_dither OH 24 00:01:08 00:02:33 0.448
GB91_dither OH 24 00:01:08 00:02:33 0.448
GB74_dither OH 24 00:01:08 00:02:35 0.440
GB92_dither OH 24 00:01:08 00:02:21 0.484
GB93_dither OH 24 00:01:08 00:02:19 0.493
GB75_dither OH 72 00:03:25 00:07:17 0.471
GB112_dither OH 72 00:03:25 00:07:39 0.448
GB79_dither OH 72 00:03:25 00:08:58 0.383
GB60_dither OH 48 00:02:17 00:04:35 0.498
GB95_dither OH 48 00:02:17 00:05:15 0.436
GB113_dither OH 48 00:02:17 00:04:43 0.484
GB114_dither OH 48 00:02:17 00:05:09 0.444
GB97_dither OH 48 00:02:17 00:04:57 0.461
GB96_dither OH 48 00:02:17 00:05:20 0.429
GB80_dither OH 48 00:02:17 00:05:09 0.444
FLAT OY 220 00:10:29 00:19:24 0.540










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 65:44:26 222:54:17 0.295

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 1739:04:34 928:02:15 811:02:19 227:05:27 194:38:57 194:38:57 194:38:57 25:23:21
Observed 220:56:49
(12.70%)		 73:45:06
(7.95%)		 147:11:42
(18.15%)		 54:20:24
(23.93%)		 29:39:44
(15.24%)		 36:03:22
(18.52%)		 27:08:11
(13.94%)		 25:23:21
(N/A)
Remaining 1518:07:45
(87.30%)		 854:17:08
(92.05%)		 663:50:36
(81.85%)		 172:45:02
(76.07%)		 164:59:13
(84.76%)		 158:35:35
(81.48%)		 167:30:45
(86.06%)		 00:00:00
(N/A)











Camera status (2026/03/22)



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