PRIME Observation Log 2025/08/17

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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: 2025/08/17
Local observer: Asahi
Remote observer:
Weather: clear
Comment:
Detector Temperature: 114.00006 +- 0.00146 K
ImageAcquisitionErrors occurred 6 times @
2025-08-17 23:58:16 SAT
2025-08-18 02:06:50 SAT
2025-08-18 02:11:04 SAT
2025-08-18 02:18:33 SAT
2025-08-18 02:21:37 SAT
2025-08-18 06:13:28 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:33:24
Morning 06:47:32
Science Observation
(Sun altitude < -10°)
Start 18:55:07
End 06:25:52
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 18:55:07
End 02:22:50


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 11:15:43 11:30:45 0.978
GB Time 06:30:21 07:27:43 0.872
Non-GB Time 04:45:22 04:03:01 1.174


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 408 00:19:26 00:36:53 0.527
GB 3604 02:51:47 06:30:21 0.440
SAAO 874 00:41:39 02:04:58 0.333
OU 496 00:23:38 00:53:27 0.442
NASA 496 00:23:38 00:53:27 0.442
ABC 496 00:23:38 00:53:27 0.442


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 408 00:19:26 00:36:53 0.527
Bulge 3532 02:48:21 06:22:13 0.440
SKY 72 00:03:25 00:08:07 0.422
ToO 378 00:18:01 01:11:31 0.252
all_sky_grid 1984 01:34:34 03:33:50 0.442


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OY 408 00:19:26 00:36:53 0.527
GB76_test OH 52 00:02:28 00:15:59 0.155
GB76_dither OH 336 00:16:00 00:34:47 0.460
GB77_dither OH 336 00:16:00 00:34:28 0.464
GB78_dither OH 336 00:16:00 00:35:32 0.451
GB94_dither OH 336 00:16:00 00:34:42 0.462
GB111_dither OH 312 00:14:52 00:32:57 0.451
GB110_dither OH 336 00:16:00 00:36:08 0.443
GB109_dither OH 168 00:08:00 00:17:31 0.457
GB92_dither OH 96 00:04:34 00:09:47 0.467
GB93_dither OH 96 00:04:34 00:09:33 0.479
GB75_dither OH 168 00:08:00 00:17:33 0.456
GB112_dither OH 144 00:06:51 00:15:16 0.449
GB79_dither OH 144 00:06:51 00:15:44 0.436
GB60_dither OH 72 00:03:25 00:07:35 0.452
GB107_dither OH 48 00:02:17 00:05:09 0.444
GB106_dither OH 48 00:02:17 00:04:46 0.479
GB105_dither OH 48 00:02:17 00:06:55 0.330
GB88_dither OH 24 00:01:08 00:02:27 0.465
GB89_dither OH 24 00:01:08 00:02:16 0.503
GB90_dither OH 24 00:01:08 00:02:35 0.440
GB73_dither OH 24 00:01:08 00:02:21 0.484
GB72_dither OH 24 00:01:08 00:02:19 0.493
GB71_dither OH 24 00:01:08 00:02:41 0.425
GB95_dither OH 72 00:03:25 00:07:51 0.437
GB113_dither OH 72 00:03:25 00:07:26 0.462
GCsky 72 00:03:25 00:08:07 0.422
GB108_dither OH 24 00:01:08 00:02:30 0.456
GB91_dither OH 24 00:01:08 00:02:30 0.456
GB74_dither OH 24 00:01:08 00:02:38 0.434
GB114_dither OH 24 00:01:08 00:02:27 0.465
GB97_dither OH 24 00:01:08 00:02:33 0.448
GB96_dither OH 24 00:01:08 00:02:33 0.448
GB80_dither OH 24 00:01:08 00:02:30 0.456
field1811_test 147 00:07:00 00:34:39 0.202
field1811 231 00:11:00 00:36:52 0.299
field16046_test 24 00:01:08 00:07:02 0.163
field16046 40 00:01:54 00:03:49 0.499
field16047 40 00:01:54 00:04:06 0.463
field16048 40 00:01:54 00:04:01 0.473
field16049 40 00:01:54 00:04:00 0.476
field16050 40 00:01:54 00:04:10 0.456
field16051 40 00:01:54 00:04:09 0.458
field16052 40 00:01:54 00:04:06 0.465
field16053 40 00:01:54 00:03:59 0.478
field16054 40 00:01:54 00:04:01 0.474
field16055 40 00:01:54 00:04:01 0.474
field16056 40 00:01:54 00:04:06 0.463
field16057 40 00:01:54 00:04:09 0.458
field16058 40 00:01:54 00:03:55 0.485
field16059 40 00:01:54 00:03:55 0.485
field16060 40 00:01:54 00:03:58 0.480
field16061 40 00:01:54 00:03:55 0.485
field16062 40 00:01:54 00:04:04 0.469
field16063 40 00:01:54 00:04:06 0.463
field16064 40 00:01:54 00:04:06 0.463
field16065 40 00:01:54 00:04:06 0.463
field16066 40 00:01:54 00:04:01 0.474
field16067 40 00:01:54 00:03:58 0.480
field16068 40 00:01:54 00:04:14 0.450
field16069 40 00:01:54 00:04:20 0.439
field16070 40 00:01:54 00:04:18 0.442
field16071 40 00:01:54 00:04:01 0.474
field16072 40 00:01:54 00:04:12 0.453
field16073 40 00:01:54 00:04:19 0.441
field16074 40 00:01:54 00:04:10 0.457
field16075 40 00:01:54 00:04:16 0.447
field16076 40 00:01:54 00:04:09 0.458
field16077 40 00:01:54 00:03:57 0.481
field16078 40 00:01:54 00:04:02 0.472
field16079 40 00:01:54 00:03:55 0.485
field16080 40 00:01:54 00:03:50 0.497
field16081 40 00:01:54 00:03:55 0.485
field16082 40 00:01:54 00:03:50 0.497
field16083 40 00:01:54 00:03:52 0.491
field16084 40 00:01:54 00:04:15 0.448
field16085 40 00:01:54 00:04:14 0.450
field16086 40 00:01:54 00:04:07 0.462
field16087 40 00:01:54 00:04:01 0.474
field16088 40 00:01:54 00:03:58 0.480
field16089 40 00:01:54 00:04:09 0.458
field16090 40 00:01:54 00:04:11 0.455
field16091 40 00:01:54 00:08:42 0.219
field16092 40 00:01:54 00:03:58 0.480
field16093 40 00:01:54 00:04:06 0.463
field16094 40 00:01:54 00:06:41 0.285










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 122:49:20 199:07:50 0.617

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 1920:08:17 998:47:19 921:20:58 257:58:40 221:07:26 221:07:26 221:07:26 173:36:45
Observed 1279:21:13
(66.63%)		 819:36:16
(82.06%)		 459:44:57
(49.90%)		 96:37:34
(37.46%)		 104:53:49
(47.44%)		 188:40:54
(85.33%)		 69:32:38
(31.45%)		 173:36:45
(N/A)
Remaining 640:47:04
(33.37%)		 179:11:03
(17.94%)		 461:36:01
(50.10%)		 161:21:05
(62.54%)		 116:13:36
(52.56%)		 32:26:31
(14.67%)		 151:34:47
(68.55%)		 00:00:00
(N/A)











Camera status (2025/08/17)



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