PRIME Observation Log 2026/03/18

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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: 2026/03/18
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 114.50014 +- 0.00119 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:12:41
Morning 06:17:04
Science Observation
(Sun altitude < -10°)
Start 19:34:05
End 05:55:38
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 00:52:10
End 05:55:38


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 01:01:14 10:21:32 0.099
GB Time 01:01:14 05:03:28 0.202
Non-GB Time 00:00:00 05:18:04 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB 560 00:26:41 01:01:14 0.436


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
Bulge 536 00:25:32 00:58:24 0.437
SKY 24 00:01:08 00:02:50 0.404


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB75_test OH 4 00:00:11 00:02:45 0.069
GCsky 24 00:01:08 00:02:50 0.404
GB76_dither OH 52 00:02:28 00:05:44 0.431
GB77_dither OH 48 00:02:17 00:04:38 0.493
GB78_dither OH 48 00:02:17 00:05:03 0.452
GB94_dither OH 48 00:02:17 00:04:52 0.469
GB111_dither OH 48 00:02:17 00:05:06 0.448
GB110_dither OH 48 00:02:17 00:04:52 0.470
GB109_dither OH 24 00:01:08 00:02:21 0.483
GB108_dither OH 24 00:01:08 00:02:33 0.448
GB91_dither OH 24 00:01:08 00:02:19 0.493
GB74_dither OH 24 00:01:08 00:02:38 0.432
GB92_dither OH 24 00:01:08 00:02:49 0.404
GB93_dither OH 24 00:01:08 00:02:38 0.432
GB75_dither OH 24 00:01:08 00:02:25 0.473
GB112_dither OH 24 00:01:08 00:02:33 0.448
GB79_dither OH 24 00:01:08 00:02:27 0.465
GB60_dither OH 24 00:01:08 00:02:33 0.448










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 99:19:50 259:06:19 0.383
Mar 62:20:07 181:07:36 0.344

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 1756:33:36 935:08:11 821:25:24 229:59:54 197:08:29 197:08:29 197:08:29 25:03:56
Observed 217:32:30
(12.38%)		 70:20:47
(7.52%)		 147:11:42
(17.92%)		 54:20:24
(23.63%)		 29:39:44
(15.05%)		 36:03:22
(18.29%)		 27:08:11
(13.77%)		 25:03:56
(N/A)
Remaining 1539:01:05
(87.62%)		 864:47:23
(92.48%)		 674:13:42
(82.08%)		 175:39:30
(76.37%)		 167:28:45
(84.95%)		 161:05:07
(81.71%)		 170:00:18
(86.23%)		 00:00:00
(N/A)











Camera status (2026/03/18)



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