PRIME Observation Log 2025/08/04

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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: 2025/08/04
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 114.00012 +- 0.00110 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:25:29
Morning 06:59:46
Science Observation
(Sun altitude < -10°)
Start 18:47:35
End 06:37:42
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 18:47:35
End 03:13:57


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 01:59:21 11:50:06 0.168
GB Time 01:59:21 08:26:22 0.236
Non-GB Time 00:00:00 03:23:44 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB 984 00:46:54 01:59:21 0.393


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
Bulge 984 00:46:54 01:59:21 0.393


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB74_test OJ 56 00:02:40 00:23:39 0.113
GB74_dither OJ 48 00:02:17 00:06:16 0.365
GB75_dither OJ 48 00:02:17 00:06:10 0.370
GB76_dither OJ 48 00:02:17 00:04:35 0.498
GB77_dither OJ 48 00:02:17 00:04:38 0.493
GB78_dither OJ 48 00:02:17 00:04:38 0.493
GB79_dither OJ 48 00:02:17 00:04:38 0.493
GB80_dither OJ 48 00:02:17 00:04:35 0.498
GB97_dither OJ 48 00:02:17 00:04:38 0.493
GB96_dither OJ 48 00:02:17 00:04:38 0.493
GB95_dither OJ 48 00:02:17 00:04:35 0.498
GB94_dither OJ 48 00:02:17 00:04:35 0.498
GB93_dither OJ 48 00:02:17 00:04:35 0.498
GB92_dither OJ 48 00:02:17 00:04:38 0.493
GB91_dither OJ 48 00:02:17 00:04:38 0.493
GB108_dither OJ 48 00:02:17 00:04:35 0.498
GB109_dither OJ 96 00:04:34 00:09:29 0.482
GB110_test OJ 16 00:00:45 00:04:10 0.183
GB110_dither OJ 48 00:02:17 00:04:41 0.488
GB111_dither OJ 48 00:02:17 00:04:51 0.471










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 29:30:23 47:28:28 0.622

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 1902:39:00 983:31:41 919:07:19 257:21:14 220:35:21 220:35:21 220:35:21 168:02:06
Observed 1186:02:15
(62.34%)		 752:54:29
(76.55%)		 433:07:45
(47.12%)		 82:46:14
(32.16%)		 100:38:32
(45.62%)		 184:25:37
(83.61%)		 65:17:21
(29.60%)		 168:02:06
(N/A)
Remaining 716:36:45
(37.66%)		 230:37:12
(23.45%)		 485:59:33
(52.88%)		 174:35:00
(67.84%)		 119:56:48
(54.38%)		 36:09:44
(16.39%)		 155:17:59
(70.40%)		 00:00:00
(N/A)











Camera status (2025/08/04)



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