PRIME Observation Log 2026/02/07

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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: 2026/02/07
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 111.99989 +- 0.00150 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:58:02
Morning 05:44:02
Science Observation
(Sun altitude < -10°)
Start 20:21:16
End 05:20:48
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 03:25:29
End 05:20:48


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 03:34:29 08:59:32 0.398
GB Time 00:00:00 01:55:19 0.000
Non-GB Time 03:34:29 07:04:12 0.506


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 263 00:12:32 00:46:05 0.272
SAAO 461 00:21:58 00:53:37 0.410
OU 461 00:21:58 00:53:37 0.410
NASA 461 00:21:58 00:53:37 0.410
ABC 461 00:21:58 00:53:37 0.410


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 168 00:08:00 00:36:16 0.221
all_sky_grid 1844 01:27:53 03:34:29 0.410
calibration 95 00:04:31 00:09:48 0.462


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test DY 4 00:00:11 00:05:39 0.034
FLAT ZO 164 00:07:49 00:30:37 0.255
field12383_test 12 00:00:34 00:11:47 0.049
field12383 60 00:02:51 00:05:40 0.503
field12384 60 00:02:51 00:05:40 0.503
field12385 60 00:02:51 00:05:43 0.499
field12386 60 00:02:51 00:05:46 0.495
field12387 60 00:02:51 00:05:43 0.499
field12388 60 00:02:51 00:05:43 0.499
field12389 60 00:02:51 00:05:52 0.487
field12390 60 00:02:51 00:05:43 0.499
field12391 60 00:02:51 00:05:40 0.503
field12392 60 00:02:51 00:05:57 0.480
field12692 60 00:02:51 00:05:43 0.499
field12693 60 00:02:51 00:05:49 0.491
field12694 76 00:03:37 00:20:30 0.177
field12694_test 16 00:00:45 00:10:51 0.070
field12695 60 00:02:51 00:05:46 0.495
field12696 60 00:02:51 00:05:57 0.480
field12697 60 00:02:51 00:05:49 0.491
field12698 60 00:02:51 00:05:46 0.495
field12699 60 00:02:51 00:05:52 0.487
field12700 60 00:02:51 00:05:46 0.495
field12701 60 00:02:51 00:09:36 0.298
field13002 60 00:02:51 00:05:46 0.495
field13003 60 00:02:51 00:05:40 0.503
field13004 60 00:02:51 00:05:43 0.499
field13005 60 00:02:51 00:05:43 0.499
field13006 60 00:02:51 00:05:46 0.495
field13007 60 00:02:51 00:05:49 0.491
field13008 60 00:02:51 00:05:40 0.503
field13009 60 00:02:51 00:05:43 0.499
field13010 60 00:02:51 00:05:43 0.499
field13011 60 00:02:51 00:05:59 0.477
reset 15 00:00:42 00:02:26 0.292
LSS_NBH 80 00:03:48 00:07:21 0.518










Stats so far in 2026
Monthly observed fraction so far in 2026
Month Observed Time
(hh:mm:ss) 		Expected Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Jan 55:55:01 259:31:55 0.215
Feb 26:23:50 62:15:15 0.424

Observed time so far in 2026
- Total time of each institute is calculated by the following
    [All observation time in 2026] = [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 2026] = [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 2026] = [All observation time in 2026] - [GB observation time in 2026]
    
    [OU, NASA, ABC time in 2026] = 0.24 x [Non-GB observation time in 2026]
    [SAAO time in 2026] = 0.28 x [Non-GB observation time in 2026]
    
- 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 1810:19:20 938:48:28 871:30:52 244:01:26 209:09:48 209:09:48 209:09:48 14:23:58
Observed 82:18:54
(4.55%)		 04:49:48
(0.51%)		 77:29:06
(8.89%)		 20:30:35
(8.40%)		 18:06:47
(8.66%)		 23:16:28
(11.13%)		 15:35:15
(7.45%)		 14:23:58
(N/A)
Remaining 1728:00:26
(95.45%)		 933:58:40
(99.49%)		 794:01:46
(91.11%)		 223:30:51
(91.60%)		 191:03:00
(91.34%)		 185:53:20
(88.87%)		 193:34:33
(92.55%)		 00:00:00
(N/A)











Camera status (2026/02/07)



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