PRIME Observation Log 2026/01/10

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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: 2026/01/10
Local observer:
Remote observer: DSuzuki
Weather: clear
Comment:
Detector Temperature: 121.49689 +- 0.05001 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:12:53
Morning 05:16:10
Science Observation
(Sun altitude < -10°)
Start 20:38:03
End 04:51:00
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start --:--:--
End --:--:--


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 01:19:59 08:12:56 0.162
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 01:19:59 08:12:56 0.162


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
NASA 656 00:31:16 01:19:59 0.391


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
ToO 656 00:31:16 01:19:59 0.391


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
field8767 84 00:04:00 00:12:15 0.327
field8767_test 8 00:00:22 00:06:52 0.055
field2850 40 00:01:54 00:04:54 0.388
field20154 40 00:01:54 00:04:43 0.404
field4457 40 00:01:54 00:04:23 0.434
field11719 40 00:01:54 00:03:55 0.485
field13888 40 00:01:54 00:03:55 0.485
field11417 40 00:01:54 00:03:52 0.491
field10221 80 00:03:48 00:08:16 0.461
field22242 4 00:00:11 00:01:55 0.099
field9635 40 00:01:54 00:03:55 0.485
field10817 40 00:01:54 00:04:34 0.416
field2505 40 00:01:54 00:04:20 0.438
field8218 40 00:01:54 00:04:04 0.469
field12034 40 00:01:54 00:03:52 0.491
field11427 40 00:01:54 00:04:05 0.465










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 28:45:38 81:24:41 0.353

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 1876:57:18 945:31:27 931:25:50 260:48:02 223:32:36 223:32:36 223:32:36 01:51:20
Observed 28:45:37
(1.53%)		 00:00:00
(0.00%)		 28:45:37
(3.09%)		 06:41:00
(2.56%)		 07:22:35
(3.30%)		 08:01:00
(3.59%)		 06:41:00
(2.99%)		 01:51:20
(N/A)
Remaining 1848:11:40
(98.47%)		 945:31:27
(100.00%)		 902:40:13
(96.91%)		 254:07:01
(97.44%)		 216:10:01
(96.70%)		 215:31:35
(96.41%)		 216:51:35
(97.01%)		 00:00:00
(N/A)











Camera status (2026/01/10)



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