PRIME Observation Log 2025/09/26

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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: 2025/09/26
Local observer:
Remote observer: Togo
Weather: Clear -> cloudy
Comment:
Detector Temperature: 116.00000 +- 0.00104 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:57:55
Morning 05:57:19
Science Observation
(Sun altitude < -10°)
Start 19:19:23
End 05:35:52
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 19:19:23
End 23:45:33


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 02:12:25 10:16:28 0.215
GB Time 02:12:25 04:26:09 0.498
Non-GB Time 00:00:00 05:50:18 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
CALIB 360 00:17:09 00:38:14 0.449
GB 380 00:18:06 02:12:25 0.137


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 360 00:17:09 00:38:14 0.449
Bulge 380 00:18:06 02:12:25 0.137


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OY 360 00:17:09 00:38:14 0.449
GB76_test OH 104 00:04:57 00:29:59 0.165
GB76_dither OH 24 00:01:08 00:03:23 0.337
GB77_dither OH 24 00:01:08 00:02:32 0.449
GB78_dither OH 24 00:01:08 00:02:19 0.493
GB94_dither OH 24 00:01:08 00:02:35 0.440
GB111_dither OH 24 00:01:08 00:02:38 0.432
GB110_dither OH 24 00:01:08 00:02:52 0.397
GB109_dither OH 24 00:01:08 00:03:09 0.362
GB108_dither OH 24 00:01:08 00:02:19 0.493
GB91_dither OH 24 00:01:08 00:12:44 0.090
GB74_test OH 36 00:01:42 00:59:59 0.029
GB74_dither OH 24 00:01:08 00:07:49 0.146










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 165:25:04 277:51:09 0.595

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 1975:00:37 1032:29:01 942:31:35 263:54:26 226:12:23 226:12:23 226:12:23 191:23:18
Observed 1552:16:13
(78.60%)		 971:37:54
(94.11%)		 580:38:18
(61.60%)		 138:13:23
(52.38%)		 129:06:10
(57.07%)		 219:33:44
(97.06%)		 93:44:59
(41.44%)		 191:23:18
(N/A)
Remaining 422:44:24
(21.40%)		 60:51:06
(5.89%)		 361:53:17
(38.40%)		 125:41:03
(47.62%)		 97:06:12
(42.93%)		 06:38:38
(2.94%)		 132:27:23
(58.56%)		 00:00:00
(N/A)











Camera status (2025/09/26)



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