PRIME Observation Log 2025/08/20

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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: 2025/08/20
Local observer: Asahi
Remote observer:
Weather: windy, clear, thick fog
Comment:
Detector Temperature: 113.99995 +- 0.00148 K
ImageAcquisitionErrors occurred 3 times @
2025-08-21 02:38:38 SAT
2025-08-21 02:51:51 SAT
2025-08-21 02:55:32 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:35:14
Morning 06:44:18
Science Observation
(Sun altitude < -10°)
Start 18:56:51
End 06:22:43
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 18:56:51
End 02:11:02


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 05:48:10 11:25:51 0.508
GB Time 02:17:31 07:14:11 0.317
Non-GB Time 03:30:39 04:11:40 0.837


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.)
NASA 286 00:13:37 00:50:15 0.271
GB 1144 00:54:31 02:17:31 0.397
SAAO 1047 00:49:54 01:55:54 0.431
OU 214 00:10:12 00:22:14 0.459
ABC 214 00:10:12 00:22:14 0.459


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
ToO 297 00:14:09 01:01:46 0.229
Bulge 1120 00:53:23 02:15:06 0.395
SKY 24 00:01:08 00:02:24 0.474
all_sky_grid 1464 01:09:47 02:28:52 0.469


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
no_grid_test 72 00:03:25 00:28:00 0.123
GB76_test OH 48 00:02:17 00:21:07 0.108
GB114_test OY 16 00:00:45 00:08:14 0.093
GB80_dither OY 48 00:02:17 00:04:43 0.484
GB79_dither OY 48 00:02:17 00:05:00 0.456
GB78_dither OY 48 00:02:17 00:04:35 0.498
GB60_dither OY 48 00:02:17 00:04:55 0.465
GB77_dither OY 48 00:02:17 00:04:57 0.461
GB76_dither OY 48 00:02:17 00:04:49 0.474
GB75_dither OY 48 00:02:17 00:04:46 0.479
GB74_dither OY 48 00:02:17 00:04:41 0.488
GCsky 24 00:01:08 00:02:24 0.474
GB91_dither OY 48 00:02:17 00:04:43 0.484
GB92_dither OY 48 00:02:17 00:04:57 0.461
GB93_dither OY 48 00:02:17 00:04:43 0.484
GB94_dither OY 48 00:02:17 00:04:49 0.474
GB95_dither OY 48 00:02:17 00:04:38 0.493
GB96_dither OY 48 00:02:17 00:04:57 0.461
GB97_dither OY 48 00:02:17 00:04:46 0.479
GB114_dither OY 48 00:02:17 00:04:46 0.479
GB113_dither OY 48 00:02:17 00:04:43 0.484
GB112_dither OY 48 00:02:17 00:04:46 0.479
GB111_dither OY 48 00:02:17 00:04:49 0.474
GB110_dither OY 48 00:02:17 00:04:46 0.479
GB109_dither OY 48 00:02:17 00:04:32 0.503
GB108_dither OY 48 00:02:17 00:05:09 0.444
field1952_tset 3 00:00:08 00:07:14 0.020
field1811_test 75 00:03:34 00:16:04 0.223
field1811 150 00:07:09 00:17:41 0.404
field5055_tset 16 00:00:45 00:06:30 0.117
field5055 589 00:28:04 00:46:08 0.608
field15098_test 16 00:00:45 00:03:28 0.219
field15098 40 00:01:54 00:04:01 0.474
field15099 40 00:01:54 00:03:50 0.497
field15100 40 00:01:54 00:03:52 0.491
field15101 40 00:01:54 00:03:50 0.497
field15102 40 00:01:54 00:03:52 0.491
field15103 40 00:01:54 00:04:40 0.408
field15104 40 00:01:54 00:04:01 0.474
field15105 40 00:01:54 00:04:29 0.425
field15106 40 00:01:54 00:04:06 0.464
field15107 40 00:01:54 00:04:15 0.448
field15108 40 00:01:54 00:04:21 0.438
field15109 40 00:01:54 00:04:00 0.475
field15110 40 00:01:54 00:04:10 0.458
field15111 40 00:01:54 00:03:47 0.503
field15112 40 00:01:54 00:04:04 0.469
field15113 40 00:01:54 00:04:01 0.474
field15114 40 00:01:54 00:04:04 0.469
field15115 40 00:01:54 00:04:06 0.463
field15116 40 00:01:54 00:03:52 0.491
field15117 40 00:01:54 00:03:50 0.497
field15118 40 00:01:54 00:04:11 0.455










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 151:30:51 233:30:21 0.649

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 1931:38:32 1003:37:17 928:01:14 259:50:44 222:43:29 222:43:29 222:43:29 174:46:36
Observed 1308:02:42
(67.72%)		 835:24:17
(83.24%)		 472:38:25
(50.93%)		 102:46:47
(39.55%)		 106:59:14
(48.04%)		 191:14:19
(85.86%)		 71:38:03
(32.16%)		 174:46:36
(N/A)
Remaining 623:35:49
(32.28%)		 168:13:00
(16.76%)		 455:22:48
(49.07%)		 157:03:57
(60.45%)		 115:44:14
(51.96%)		 31:29:10
(14.14%)		 151:05:26
(67.84%)		 00:00:00
(N/A)











Camera status (2025/08/20)



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