PRIME Observation Log 2025/04/13

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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: 2025/04/13
Local observer: Seiya Nakayama, Ryo Ogawa
Remote observer:
Weather: cloudy
Comment:
Detector Temperature: 114.00000 +- 0.00000 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 18:39:40
Morning 06:34:57
Science Observation
(Sun altitude < -10°)
Start 19:01:05
End 06:13:29
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 23:08:56
End 06:13:29


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 00:29:37 11:12:24 0.044
GB Time 00:00:00 07:04:33 0.000
Non-GB Time 00:29:37 04:07:50 0.120


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 4 00:00:11 00:00:41 0.276
ALLSKY 204 00:09:43 00:29:37 0.328
SAAO 51 00:02:25 00:07:24 0.328
OU 51 00:02:25 00:07:24 0.328
NASA 51 00:02:25 00:07:24 0.328
ABC 51 00:02:25 00:07:24 0.328


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 4 00:00:11 00:00:41 0.276
all_sky_grid 204 00:09:43 00:29:37 0.328


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT OY 4 00:00:11 00:00:41 0.276
field8585_test 44 00:02:05 00:11:16 0.186
field8585 40 00:01:54 00:03:50 0.497
field8586 40 00:01:54 00:05:36 0.340
field10911_test 4 00:00:11 00:01:04 0.177
field10911 40 00:01:54 00:04:06 0.463
field10912 36 00:01:42 00:03:43 0.461










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 50:59:13 143:17:34 0.356

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 1765:37:28 899:25:18 866:12:10 242:32:12 207:53:19 207:53:19 207:53:19 115:15:30
Observed 367:27:11
(20.81%)		 114:48:41
(12.77%)		 252:38:29
(29.17%)		 31:58:43
(13.19%)		 61:50:32
(29.75%)		 130:43:05
(62.88%)		 28:06:08
(13.52%)		 115:15:30
(N/A)
Remaining 1398:10:17
(79.19%)		 784:36:36
(87.23%)		 613:33:40
(70.83%)		 210:33:29
(86.81%)		 146:02:46
(70.25%)		 77:10:14
(37.12%)		 179:47:10
(86.48%)		 00:00:00
(N/A)











Camera status (2025/04/13)