PRIME Observation Log 2025/06/20

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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: 2025/06/20
Local observer: Takuto
Remote observer: None
Weather: Clear, Humidity
Comment:
Detector Temperature: 114.00044 +- 0.00205 K
ImageAcquisitionErrors occurred 1 times @
2025-06-20 18:02:26 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:03:38
Morning 07:13:20
Science Observation
(Sun altitude < -10°)
Start 18:26:46
End 06:50:12
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 18:41:35
End 06:10:53


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 00:12:39 12:23:25 0.017
GB Time 00:00:00 11:29:17 0.000
Non-GB Time 00:12:39 00:54:07 0.234


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 184 00:08:46 00:30:33 0.287
SAAO 22 00:01:02 00:03:09 0.331
OU 22 00:01:02 00:03:09 0.331
NASA 22 00:01:02 00:03:09 0.331
ABC 22 00:01:02 00:03:09 0.331


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 184 00:08:46 00:30:33 0.287
all_sky_grid 88 00:04:11 00:12:39 0.331


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test OH 4 00:00:11 00:05:11 0.037
FLAT OH 180 00:08:34 00:25:21 0.338
field12163_test 8 00:00:22 00:04:29 0.085
field12163 40 00:01:54 00:03:50 0.497
field12164 40 00:01:54 00:04:19 0.440










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 141:40:34 247:02:40 0.573

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 1854:26:57 948:21:29 906:05:27 253:42:19 217:27:42 217:27:42 217:27:42 152:14:09
Observed 863:29:34
(46.56%)		 491:15:25
(51.80%)		 372:14:08
(41.08%)		 60:57:57
(24.03%)		 88:09:13
(40.54%)		 170:18:54
(78.32%)		 52:48:02
(24.28%)		 152:14:09
(N/A)
Remaining 990:57:22
(53.44%)		 457:06:03
(48.20%)		 533:51:18
(58.92%)		 192:44:21
(75.97%)		 129:18:28
(59.46%)		 47:08:47
(21.68%)		 164:39:40
(75.72%)		 00:00:00
(N/A)











Camera status (2025/06/20)



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