PRIME Observation Log 2026/03/17

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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: 2026/03/17
Local observer:
Remote observer: Ryunosuke
Weather: cloudy
Comment:
Detector Temperature: 114.49963 +- 0.00357 K
ImageAcquisitionErrors occurred 0 times

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:13:59
Morning 06:16:20
Science Observation
(Sun altitude < -10°)
Start 19:35:24
End 05:54:53
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 00:56:05
End 05:54:53


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 02:34:37 10:19:28 0.250
GB Time 02:34:37 04:58:48 0.517
Non-GB Time 00:00:00 05:20:40 0.000


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB 1480 01:10:32 02:34:37 0.456
CALIB 348 00:16:35 00:29:37 0.560


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
Bulge 1432 01:08:15 02:29:30 0.457
SKY 48 00:02:17 00:05:06 0.448
TWILIGHT 348 00:16:35 00:29:37 0.560


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
GB76_test OH 12 00:00:34 00:04:57 0.115
GB76_dither OH 144 00:06:51 00:14:00 0.490
GB77_dither OH 144 00:06:51 00:13:57 0.492
GB78_dither OH 144 00:06:51 00:13:54 0.493
GB94_dither OH 144 00:06:51 00:13:57 0.492
GB111_dither OH 124 00:05:54 00:17:48 0.332
GB110_dither OH 144 00:06:51 00:14:08 0.485
GB109_dither OH 72 00:03:25 00:07:03 0.487
GB92_dither OH 48 00:02:17 00:04:41 0.488
GB93_dither OH 48 00:02:17 00:04:43 0.484
GB75_dither OH 72 00:03:25 00:07:11 0.477
GCsky 48 00:02:17 00:05:06 0.448
GB112_dither OH 48 00:02:17 00:04:38 0.493
GB113_dither OH 48 00:02:17 00:04:43 0.484
GB114_dither OH 24 00:01:08 00:02:21 0.484
GB97_dither OH 24 00:01:08 00:02:21 0.484
GB80_dither OH 24 00:01:08 00:02:19 0.493
GB79_dither OH 48 00:02:17 00:04:49 0.474
GB60_dither OH 24 00:01:08 00:02:19 0.493
GB108_dither OH 24 00:01:08 00:02:19 0.493
GB91_dither OH 24 00:01:08 00:02:21 0.484
GB74_dither OH 24 00:01:08 00:02:30 0.456
GB95_dither OH 24 00:01:08 00:02:19 0.493
FLAT ZO 348 00:16:35 00:29:37 0.560










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 61:18:53 170:46:03 0.359

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 1760:43:08 936:38:41 824:04:26 230:44:26 197:46:40 197:46:40 197:46:40 25:03:56
Observed 216:31:15
(12.30%)		 69:19:33
(7.40%)		 147:11:42
(17.86%)		 54:20:24
(23.55%)		 29:39:44
(15.00%)		 36:03:22
(18.23%)		 27:08:11
(13.72%)		 25:03:56
(N/A)
Remaining 1544:11:52
(87.70%)		 867:19:08
(92.60%)		 676:52:44
(82.14%)		 176:24:02
(76.45%)		 168:06:55
(85.00%)		 161:43:17
(81.77%)		 170:38:28
(86.28%)		 00:00:00
(N/A)











Camera status (2026/03/17)



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