PRIME Observation Log 2026/02/26

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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: 2026/02/26
Local observer:
Remote observer: Takuto, Chihiro
Weather: Clear
Comment:
Detector Temperature: 111.99982 +- 0.00154 K
ImageAcquisitionErrors occurred 1 times @
2026-02-26 22:15:19 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:37:58
Morning 06:01:30
Science Observation
(Sun altitude < -10°)
Start 20:00:02
End 05:39:24
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 02:10:47
End 05:39:24


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 08:44:15 09:39:21 0.905
GB Time 03:39:02 03:28:37 1.050
Non-GB Time 05:05:13 06:10:44 0.823


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 240 00:11:26 00:20:49 0.549
NASA 708 00:33:44 01:16:49 0.439
GB 1916 01:31:19 03:39:02 0.417
SAAO 704 00:33:33 01:16:08 0.441
OU 704 00:33:33 01:16:08 0.441
ABC 704 00:33:33 01:16:08 0.441


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 240 00:11:26 00:20:49 0.549
ToO 4 00:00:11 00:00:41 0.276
all_sky_grid 2816 02:14:13 05:04:32 0.441
Bulge 1820 01:26:45 03:19:20 0.435
SKY 96 00:04:34 00:19:41 0.232


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT ZO 240 00:11:26 00:20:49 0.549
no_grid_test 4 00:00:11 00:00:41 0.276
field19279_test 12 00:00:34 00:11:41 0.049
field19279 60 00:02:51 00:06:36 0.432
field19280 60 00:02:51 00:06:00 0.476
field19281 60 00:02:51 00:05:43 0.499
field19282 60 00:02:51 00:06:39 0.429
field18968 60 00:02:51 00:05:49 0.491
field18969 60 00:02:51 00:06:42 0.426
field18970 60 00:02:51 00:06:23 0.448
field18971 60 00:02:51 00:05:51 0.488
field18972 80 00:03:48 00:13:39 0.279
field18973 60 00:02:51 00:05:46 0.495
field18661 60 00:02:51 00:05:43 0.499
field18662 60 00:02:51 00:05:49 0.491
field18663 60 00:02:51 00:05:52 0.487
field17403 60 00:02:51 00:05:43 0.499
field16773 60 00:02:51 00:05:40 0.503
field16774 60 00:02:51 00:05:40 0.503
field16775 60 00:02:51 00:05:43 0.499
field16776 60 00:02:51 00:05:46 0.495
field16777 60 00:02:51 00:05:49 0.491
field16778 60 00:02:51 00:05:49 0.491
field16779 60 00:02:51 00:05:40 0.503
field16780 60 00:02:51 00:05:40 0.503
field16781 60 00:02:51 00:05:40 0.503
field16782 60 00:02:51 00:05:52 0.487
field16458 60 00:02:51 00:05:43 0.499
field16459 60 00:02:51 00:05:46 0.495
field16460 60 00:02:51 00:05:46 0.495
field16461 60 00:02:51 00:05:46 0.495
field16462 60 00:02:51 00:05:40 0.503
field16463 60 00:02:51 00:05:40 0.503
field16464 60 00:02:51 00:05:40 0.503
field16465 60 00:02:51 00:05:40 0.503
field16466 60 00:02:51 00:05:40 0.503
field16467 60 00:02:51 00:09:05 0.315
field6924_test 24 00:01:08 00:07:13 0.158
field6924 60 00:02:51 00:05:43 0.499
field6925 60 00:02:51 00:05:43 0.499
field6926 60 00:02:51 00:05:43 0.499
field6927 60 00:02:51 00:05:43 0.499
field6928 60 00:02:51 00:07:24 0.386
field6659 60 00:02:51 00:05:43 0.499
field6660 60 00:02:51 00:05:43 0.499
field6661 60 00:02:51 00:05:43 0.499
field6662 60 00:02:51 00:05:43 0.499
field6663 60 00:02:51 00:05:43 0.499
field6664 60 00:02:51 00:05:40 0.503
field6665 60 00:02:51 00:10:37 0.269
GB83_test OJ 28 00:01:20 00:11:12 0.119
GB83_dither OJ 48 00:02:17 00:06:02 0.379
GB97_dither OJ 48 00:02:17 00:04:35 0.498
GB96_dither OJ 48 00:02:17 00:04:35 0.498
GB95_dither OJ 48 00:02:17 00:04:35 0.498
GB94_dither OJ 48 00:02:17 00:04:32 0.503
GB93_dither OJ 48 00:02:17 00:04:35 0.498
GB92_dither OJ 48 00:02:17 00:04:38 0.493
GB91_dither OJ 48 00:02:17 00:05:56 0.385
GCsky 96 00:04:34 00:19:41 0.232
GB108_dither OJ 48 00:02:17 00:05:03 0.452
GB109_dither OJ 48 00:02:17 00:04:35 0.498
GB110_dither OJ 48 00:02:17 00:04:35 0.498
GB111_dither OJ 48 00:02:17 00:04:38 0.493
GB112_dither OJ 48 00:02:17 00:04:38 0.493
GB113_dither OJ 48 00:02:17 00:04:35 0.498
GB114_dither OJ 48 00:02:17 00:07:04 0.324
GB76_dither_test OH 16 00:00:45 00:08:06 0.094
GB76_dither OH 96 00:04:34 00:09:25 0.486
GB77_dither OH 96 00:04:34 00:09:22 0.488
GB78_dither OH 96 00:04:34 00:09:25 0.486
GB94_dither OH 96 00:04:34 00:09:22 0.488
GB111_dither OH 96 00:04:34 00:09:25 0.486
GB110_dither OH 96 00:04:34 00:09:19 0.491
GB109_dither OH 48 00:02:17 00:04:41 0.488
GB92_dither OH 24 00:01:08 00:02:19 0.493
GB93_dither OH 24 00:01:08 00:02:24 0.474
GB75_dither OH 48 00:02:17 00:06:30 0.352
GB112_dither OH 48 00:02:17 00:04:43 0.484
GB79_dither OH 48 00:02:17 00:04:35 0.498
GB60_dither OH 24 00:01:08 00:02:19 0.493
GB95_dither OH 24 00:01:08 00:02:19 0.493
GB113_dither OH 24 00:01:08 00:02:19 0.493
GB80_dither OH 24 00:01:08 00:02:21 0.483
GB96_dither OH 24 00:01:08 00:02:21 0.484
GB97_dither OH 24 00:01:08 00:02:21 0.484
GB114_dither OH 24 00:01:08 00:02:24 0.474
GB108_dither OH 24 00:01:08 00:02:21 0.484
GB91_dither OH 24 00:01:08 00:02:19 0.493
GB74_dither OH 24 00:01:08 00:02:35 0.440










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 90:42:30 239:41:11 0.378

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 1785:55:02 934:04:47 851:50:14 238:30:51 204:26:27 204:26:27 204:26:27 20:29:41
Observed 146:37:33
(8.21%)		 26:10:37
(2.80%)		 120:26:56
(14.14%)		 32:46:44
(13.74%)		 28:12:54
(13.80%)		 33:45:55
(16.52%)		 25:41:22
(12.57%)		 20:29:41
(N/A)
Remaining 1639:17:28
(91.79%)		 907:54:10
(97.20%)		 731:23:17
(85.86%)		 205:44:07
(86.26%)		 176:13:32
(86.20%)		 170:40:32
(83.48%)		 178:45:05
(87.43%)		 00:00:00
(N/A)











Camera status (2026/02/26)



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