PRIME Observation Log 2026/02/17

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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: 2026/02/17
Local observer:
Remote observer:
Weather:
Comment:
Detector Temperature: 111.99985 +- 0.00202 K
ImageAcquisitionErrors occurred 1 times @
2026-02-18 02:22:08 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 19:48:11
Morning 05:53:33
Science Observation
(Sun altitude < -10°)
Start 20:10:45
End 05:30:59
Bulge Observation
(Sun alt. < -10° & GB alt. > 22°)
Start 02:46:10
End 05:30:59


Observed Fraction
Actually Observed Time
(hh:mm:ss) 		Expected Observation Time
(hh:mm:ss) 		Observed Fraction
(observed/expected)
Total Time 03:43:27 09:20:13 0.399
GB Time 02:36:06 02:44:48 0.947
Non-GB Time 01:07:20 06:35:24 0.170


Institute Statistics
Institute Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
SAAO 716 00:34:07 01:07:20 0.507
GB 1480 01:10:32 02:36:06 0.452
CALIB 200 00:09:32 00:17:08 0.556


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
all_sky_grid 716 00:34:07 01:07:20 0.507
Bulge 1480 01:10:32 02:36:06 0.452
TWILIGHT 200 00:09:32 00:17:08 0.556


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
field2104_test 32 00:01:31 00:11:12 0.136
field2104 684 00:32:36 00:56:08 0.581
GB83_test OH 12 00:00:34 00:03:53 0.147
GB83_dither OH 24 00:01:08 00:02:47 0.411
GB100_dither OH 24 00:01:08 00:02:19 0.493
GB117_dither OH 24 00:01:08 00:02:30 0.456
GB82_dither OH 24 00:01:08 00:02:19 0.493
GB99_dither OH 24 00:01:08 00:02:38 0.432
GB116_dither OH 24 00:01:08 00:02:41 0.425
GB81_dither OH 24 00:01:08 00:02:33 0.448
GB98_dither OH 24 00:01:08 00:02:38 0.432
GB115_dither OH 24 00:01:08 00:02:21 0.484
GB80_dither OH 24 00:01:08 00:02:21 0.484
GB97_dither OH 24 00:01:08 00:02:19 0.493
GB114_dither OH 24 00:01:08 00:06:08 0.186
GB80_test OJ 4 00:00:11 00:01:55 0.099
GB80_dither OJ 48 00:02:17 00:04:32 0.503
GB79_dither OJ 48 00:02:17 00:04:35 0.498
GB78_dither OJ 48 00:02:17 00:04:38 0.493
GB60_dither OJ 48 00:02:17 00:04:35 0.498
GB77_dither OJ 48 00:02:17 00:04:35 0.498
GB76_dither OJ 48 00:02:17 00:04:35 0.498
GB75_dither OJ 48 00:02:17 00:04:38 0.493
GB74_dither OJ 48 00:02:17 00:04:35 0.498
GB91_dither OJ 48 00:02:17 00:04:38 0.493
GB92_dither OJ 48 00:02:17 00:04:35 0.498
GB93_dither OJ 48 00:02:17 00:04:35 0.498
GB94_dither OJ 48 00:02:17 00:04:32 0.503
GB95_dither OJ 48 00:02:17 00:04:35 0.498
GB96_dither OJ 48 00:02:17 00:04:35 0.498
GB97_dither OJ 48 00:02:17 00:04:35 0.498
GB114_dither OJ 48 00:02:17 00:04:35 0.498
GB113_dither OJ 48 00:02:17 00:04:35 0.498
GB112_dither OJ 48 00:02:17 00:04:38 0.493
GB111_dither OJ 48 00:02:17 00:04:32 0.503
GB110_dither OJ 48 00:02:17 00:04:35 0.498
GB109_dither OJ 48 00:02:17 00:04:35 0.498
GB108_dither OJ 48 00:02:17 00:04:51 0.471
GB76_dither OH 24 00:01:08 00:02:16 0.503
GB77_dither OH 24 00:01:08 00:02:19 0.493
GB78_dither OH 24 00:01:08 00:02:19 0.493
GB94_dither OH 24 00:01:08 00:02:21 0.484
GB111_dither OH 24 00:01:08 00:06:00 0.190
FLAT ZO 200 00:09:32 00:17:08 0.556










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 50:23:15 154:03:37 0.327

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 1788:24:35 934:12:17 854:12:18 239:10:38 205:00:33 205:00:33 205:00:33 18:22:29
Observed 106:18:20
(5.94%)		 12:06:38
(1.30%)		 94:11:41
(11.03%)		 26:13:05
(10.96%)		 21:39:16
(10.56%)		 27:11:35
(13.26%)		 19:07:44
(9.33%)		 18:22:29
(N/A)
Remaining 1682:06:15
(94.06%)		 922:05:38
(98.70%)		 760:00:36
(88.97%)		 212:57:32
(89.04%)		 183:21:16
(89.44%)		 177:48:57
(86.74%)		 185:52:49
(90.67%)		 00:00:00
(N/A)











Camera status (2026/02/17)



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