PRIME Observation Log 2026/01/01

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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: 2026/01/01
Local observer:
Remote observer: Ryusei
Weather: cloudy
Comment:
Detector Temperature: 119.50000 +- 0.00000 K
ImageAcquisitionErrors occurred 1 times @
2026-01-02 04:00:04 SAT

Expected Time
Twilight Flat Time
(Sun altitude = -5.5°)
Evening 20:12:41
Morning 05:08:28
Science Observation
(Sun altitude < -10°)
Start 20:38:15
End 04:42:53
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 04:09:40 08:04:37 0.515
GB Time 00:00:00 00:00:00 0.000
Non-GB Time 04:09:40 08:04:37 0.515


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 384 00:18:18 00:46:51 0.391
SAAO 549 00:26:10 01:02:25 0.419
OU 549 00:26:10 01:02:25 0.419
NASA 549 00:26:10 01:02:25 0.419
ABC 549 00:26:10 01:02:25 0.419


Type Statistics
Type Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
TWILIGHT 384 00:18:18 00:46:51 0.391
offset_all_sky_grid 2196 01:44:40 04:09:40 0.419


Target Statistics
Target Total Frame Total Exposure
(hh:mm:ss) 		Total Observation
(hh:mm:ss) 		Efficiency
(exp./obs.)
FLAT_test OJ 12 00:00:34 00:11:33 0.050
FLAT OJ 372 00:17:43 00:35:18 0.502
offset_field11157_test 20 00:00:57 00:07:13 0.132
offset_field11157 40 00:01:54 00:04:12 0.453
offset_field11158 40 00:01:54 00:04:12 0.453
offset_field11159 40 00:01:54 00:03:58 0.480
offset_field11160 40 00:01:54 00:04:18 0.443
offset_field11161 40 00:01:54 00:04:12 0.453
offset_field11162 40 00:01:54 00:04:32 0.420
offset_field11163 40 00:01:54 00:04:40 0.408
offset_field11164 40 00:01:54 00:04:34 0.416
offset_field11165 40 00:01:54 00:05:11 0.367
offset_field11166 40 00:01:54 00:04:32 0.420
offset_field11167 40 00:01:54 00:04:37 0.412
offset_field11168 40 00:01:54 00:04:34 0.416
offset_field11170 40 00:01:54 00:04:01 0.474
offset_field11171 40 00:01:54 00:04:16 0.446
offset_field11172 40 00:01:54 00:04:34 0.416
offset_field11173 40 00:01:54 00:05:35 0.341
offset_field11174 40 00:01:54 00:04:29 0.425
offset_field11175 40 00:01:54 00:03:52 0.491
offset_field11176 40 00:01:54 00:03:50 0.497
offset_field11177 40 00:01:54 00:03:52 0.491
offset_field11178 40 00:01:54 00:04:12 0.453
offset_field11179 40 00:01:54 00:04:16 0.446
offset_field11180 40 00:01:54 00:05:40 0.336
offset_field11181 40 00:01:54 00:04:05 0.465
offset_field11182 40 00:01:54 00:04:32 0.420
offset_field11183 40 00:01:54 00:04:03 0.470
offset_field11184 40 00:01:54 00:04:26 0.429
offset_field11185 40 00:01:54 00:03:52 0.491
offset_field11186 40 00:01:54 00:04:26 0.429
offset_field11187 40 00:01:54 00:04:09 0.458
offset_field11188 40 00:01:54 00:04:12 0.453
offset_field11189 40 00:01:54 00:04:26 0.429
offset_field11190 40 00:01:54 00:04:43 0.404
offset_field11191 40 00:01:54 00:03:56 0.484
offset_field11192 40 00:01:54 00:04:26 0.429
offset_field11193 40 00:01:54 00:04:23 0.435
offset_field11194 40 00:01:54 00:04:26 0.429
offset_field11195 40 00:01:54 00:04:43 0.404
offset_field11196 40 00:01:54 00:04:26 0.429
offset_field11197 40 00:01:54 00:03:55 0.485
offset_field11198 40 00:01:54 00:04:54 0.388
offset_field11483 40 00:01:54 00:04:57 0.385
offset_field11484 40 00:01:54 00:04:09 0.458
offset_field11485 40 00:01:54 00:04:26 0.429
offset_field11486 56 00:02:40 00:07:39 0.349
offset_field11487 40 00:01:54 00:04:37 0.412
offset_field11488 40 00:01:54 00:04:39 0.409
offset_field11489 40 00:01:54 00:04:54 0.388
offset_field11490 40 00:01:54 00:03:52 0.491
offset_field11491 40 00:01:54 00:03:52 0.491
offset_field11492 40 00:01:54 00:04:46 0.400
offset_field11493 40 00:01:54 00:04:12 0.452
offset_field11494 40 00:01:54 00:04:03 0.469
offset_field11495 40 00:01:54 00:05:42 0.334










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 04:09:40 08:04:37 0.515

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 1889:01:23 945:31:27 943:29:55 264:10:46 226:26:22 226:26:22 226:26:22 00:46:51
Observed 04:09:40
(0.22%)		 00:00:00
(0.00%)		 04:09:40
(0.44%)		 01:02:25
(0.39%)		 01:02:25
(0.46%)		 01:02:25
(0.46%)		 01:02:25
(0.46%)		 00:46:51
(N/A)
Remaining 1884:51:42
(99.78%)		 945:31:27
(100.00%)		 939:20:14
(99.56%)		 263:08:21
(99.61%)		 225:23:57
(99.54%)		 225:23:57
(99.54%)		 225:23:57
(99.54%)		 00:00:00
(N/A)











Camera status (2026/01/01)



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