PRIME Observation Log 2025/07/21

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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: 2025/07/21
Local observer: Togo
Remote observer:
Weather: Clear ->cloudy
Comment:
Detector Temperature: 114.00209 +- 0.01538 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:17:03
Morning 07:09:06
Science Observation
(Sun altitude < -10°)
Start 18:39:38
End 06:46:34
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 18:39:38
End 04:09:00


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 01:10:49 12:06:55 0.097
GB Time 01:10:49 09:29:21 0.124
Non-GB Time 00:00:00 02:37:33 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
CALIB 320 00:15:15 00:27:46 0.549
GB 792 00:37:45 01:10:49 0.533


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 320 00:15:15 00:27:46 0.549
Bulge 792 00:37:45 01:10:49 0.533


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OY 320 00:15:15 00:27:46 0.549
GB74_test OJ 24 00:01:08 00:05:21 0.214
GB74 OJ 48 00:02:17 00:04:04 0.561
GB75 OJ 48 00:02:17 00:04:04 0.561
GB76 OJ 48 00:02:17 00:04:01 0.568
GB77 OJ 48 00:02:17 00:04:04 0.561
GB78 OJ 48 00:02:17 00:04:04 0.561
GB79 OJ 48 00:02:17 00:04:04 0.561
GB80 OJ 48 00:02:17 00:04:01 0.568
GB97 OJ 48 00:02:17 00:04:04 0.561
GB96 OJ 48 00:02:17 00:04:04 0.561
GB95 OJ 48 00:02:17 00:04:04 0.561
GB94 OJ 48 00:02:17 00:04:07 0.555
GB93 OJ 48 00:02:17 00:04:04 0.561
GB92 OJ 48 00:02:17 00:04:04 0.561
GB91 OJ 48 00:02:17 00:04:04 0.561
GB108 OJ 48 00:02:17 00:04:04 0.561
GB109 OJ 48 00:02:17 00:04:20 0.527










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 143:00:22 257:17:19 0.556

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 1875:14:00 963:15:32 911:58:27 255:21:10 218:52:25 218:52:25 218:52:25 161:54:34
Observed 1074:49:02
(57.32%)		 670:08:48
(69.57%)		 404:40:14
(44.37%)		 69:04:29
(27.05%)		 96:15:45
(43.98%)		 178:25:26
(81.52%)		 60:54:33
(27.83%)		 161:54:34
(N/A)
Remaining 800:24:57
(42.68%)		 293:06:44
(30.43%)		 507:18:12
(55.63%)		 186:16:40
(72.95%)		 122:36:40
(56.02%)		 40:26:59
(18.48%)		 157:57:51
(72.17%)		 00:00:00
(N/A)











Camera status (2025/07/21)



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