PRIME Observation Log 2025/09/14

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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: 2025/09/14
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 115.99997 +- 0.00092 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:50:17
Morning 06:13:24
Science Observation
(Sun altitude < -10°)
Start 19:11:36
End 05:52:06
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:11:36
End 00:32:44


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 02:42:52 10:40:29 0.254
GB Time 00:57:36 05:21:07 0.179
Non-GB Time 01:45:16 05:19:21 0.330


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.)
GB 524 00:24:58 00:57:36 0.434
SAAO 220 00:10:29 00:26:19 0.398
OU 220 00:10:29 00:26:19 0.398
NASA 220 00:10:29 00:26:19 0.398
ABC 220 00:10:29 00:26:19 0.398


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
Bulge 524 00:24:58 00:57:36 0.434
all_sky_grid 880 00:41:56 01:45:16 0.398


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB111_dither OH 84 00:04:00 00:08:18 0.482
GB77_dither OH 48 00:02:17 00:04:55 0.465
GB78_dither OH 48 00:02:17 00:04:41 0.488
GB94_dither OH 72 00:03:25 00:08:18 0.413
GB110_dither OH 72 00:03:25 00:07:45 0.442
GB109_dither OH 48 00:02:17 00:05:53 0.389
GB75_dither OH 24 00:01:08 00:02:25 0.472
GB76_dither OH 24 00:01:08 00:02:32 0.450
GB95_dither OH 24 00:01:08 00:02:24 0.474
GB112_dither OH 24 00:01:08 00:02:21 0.484
GB113_dither OH 24 00:01:08 00:02:19 0.493
GB79_dither OH 24 00:01:08 00:04:16 0.267
GB92_dither OH 8 00:00:22 00:01:22 0.276
field8749_test 24 00:01:08 00:11:39 0.098
field8749 40 00:01:54 00:03:58 0.479
field8750 40 00:01:54 00:04:20 0.439
field8751 40 00:01:54 00:03:58 0.480
field8752 40 00:01:54 00:03:58 0.480
field8753 40 00:01:54 00:04:09 0.458
field8755 40 00:01:54 00:06:21 0.300
field4479 40 00:01:54 00:03:58 0.480
field4478 40 00:01:54 00:03:50 0.497
field4702 40 00:01:54 00:05:25 0.351
field4701_test 16 00:00:45 00:05:11 0.147
field4701 40 00:01:54 00:04:06 0.463
field4930 40 00:01:54 00:04:04 0.469
field4700 40 00:01:54 00:03:50 0.497
field4699 40 00:01:54 00:03:52 0.491
field4929 40 00:01:54 00:04:21 0.438
field4928 40 00:01:54 00:04:17 0.444
field4927 40 00:01:54 00:04:04 0.469
field4926 40 00:01:54 00:03:58 0.480
field5161 40 00:01:54 00:03:50 0.497
field5160 40 00:01:54 00:03:50 0.497
field5397 40 00:01:54 00:03:47 0.503
field5396 40 00:01:54 00:04:19 0.440










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 104:09:32 152:20:18 0.684

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 1976:30:31 1026:46:09 949:44:21 265:55:37 227:56:14 227:56:14 227:56:14 184:56:09
Observed 1491:00:41
(75.44%)		 936:46:31
(91.24%)		 554:14:10
(58.36%)		 132:02:41
(49.65%)		 123:28:52
(54.17%)		 210:34:54
(92.39%)		 88:07:41
(38.66%)		 184:56:09
(N/A)
Remaining 485:29:49
(24.56%)		 89:59:38
(8.76%)		 395:30:11
(41.64%)		 133:52:55
(50.35%)		 104:27:22
(45.83%)		 17:21:19
(7.61%)		 139:48:33
(61.34%)		 00:00:00
(N/A)











Camera status (2025/09/14)



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