AGASC ID 841357576

Info

Last Obs. 2023:270:18:24
magcatalog 9.45 ± 0.10
mag3 arcsec 9.42 ± 0.03
mag5 arcsec 9.42 ± 0.03
Nobs 13 (0 bad)
fok 98.6%
f3 arcsec 99.4%
f5 arcsec 100.0%

Timeline

Observation Info

OBSID Time Slot Row Col N Nmag est ok Nout fmag est ok fdr3 fdbox5 fmag est ok 3 ⟨ δ mag ⟩ 100s ⟨ mag ⟩ σmag Comments
25967 2022:213:07:56:37.426 7 -444.1 -457.5 16725 16648 12 100.0% 100.0% 100.0% 99.9% 0.11 9.41 0.00 --
25948 2022:273:05:17:24.844 6 -477.7 451.6 13961 13119 8 94.4% 100.0% 100.0% 94.4% 0.14 9.44 0.00 --
25936 2023:026:19:53:12.548 6 458.3 453.8 3272 3162 12 98.8% 99.0% 99.7% 97.8% 0.06 9.36 0.00 --
27678 2023:027:04:38:56.500 7 453.5 458.3 3145 2940 8 95.5% 99.5% 100.0% 95.0% 0.07 9.41 0.00 --
27679 2023:028:00:33:10.007 7 440.7 470.7 3023 2912 0 98.5% 99.9% 100.0% 98.4% 0.07 9.41 0.00 --
25939 2023:028:09:29:21.391 6 455.3 455.2 3664 3561 6 99.1% 99.9% 100.0% 99.1% 0.05 9.40 0.00 --
25921 2023:216:18:08:50.277 7 -465.7 -436.8 4229 4178 3 100.0% 98.5% 100.0% 98.5% 0.14 9.42 0.00 --
27974 2023:217:03:33:14.399 7 -468.5 -434.0 7161 7095 10 99.9% 99.0% 100.0% 98.9% 0.05 9.40 0.00 --
25959 2023:217:15:19:34.482 7 -471.5 -430.6 3878 3823 6 99.8% 99.8% 100.0% 99.7% 0.05 9.40 0.00 --
25940 2023:222:09:41:53.411 7 -492.0 -409.2 6923 6856 21 99.9% 99.8% 100.0% 99.7% 0.12 9.42 0.00 --
25966 2023:225:06:01:04.832 7 -429.0 -472.4 4718 4659 3 99.9% 95.4% 100.0% 95.3% 0.10 9.42 0.00 --
28370 2023:225:16:58:16.893 7 -491.4 -409.5 5190 5131 5 100.0% 99.6% 100.0% 99.6% 0.07 9.42 0.00 --
25952 2023:270:18:24:03.046 7 -489.5 436.2 2739 2693 2 100.0% 100.0% 100.0% 100.0% 0.06 9.43 0.00 --

  • sample: One sample of ACA image telemetry. This could be a real image readout or it could be a null 4x4 image when the ACA is not tracking. Be aware that the sample period is faster for null 4x4 images (1.025 sec) than for typical 6x6 or 8x8 tracked images (2.05 or 4.1 sec respectively).
  • Kalman samples: Subset of samples when ACA could be tracking stars (AOPCADMD == NPNT & AOACASEQ == KALM)
  • dr3: Subset of tracked Kalman samples with radial centroid residual < 3 arcsec. This corresponds to "high quality" readouts. This effectively includes the track subset (AOACFCT == TRAK) because readouts with no TRAK are assigned an infinite centroid residual.
  • dbox5: Subset of tracked Kalman samples with centroid residual within a 5 arcsec box. This corresponds to spatial filter used by the OBC for inclusion in Kalman filter. This effectively includes the track subset (AOACFCT == TRAK) because readouts with no TRAK are assigned an infinite centroid residual.
  • track: Subset of Kalman samples where the image is being tracked (AOACFCT == TRAK)
  • sat_pix: Subset of Kalman samples with saturated pixel flag OK (AOACISP == OK)
  • ion_rad: Subset of Kalman samples with ionizing radiation flag OK (AOACIIR == OK)
  • mag_est_ok: Subset of Kalman samples that have a magnitude estimate (track & ion_rad)
  • n_total: Total number of sample regardless of OBC PCAD status
  • n: Synonym for n_total
  • n_kalman: Number of Kalman samples
  • n_dr3: Number of dr3 samples.
  • n_dbox5: Number of dbox5 samples.
  • n_track: Number of track samples.
  • n_ok_3: Number of (track & sat_pix & ion_rad & dr3) samples
  • n_ok_5: Number of (track & sat_pix & ion_rad & dbox5) samples
  • n_mag_est_ok: Number of (track & ion_rad) samples
  • n_mag_est_ok_3: Number of (track & ion_rad & dr3) samples
  • n_mag_est_ok_5: Number of (track & ion_rad & dbox5) samples
  • f_dr3: Fraction of mag-est-ok samples with centroid residual < 3 arcsec((mag_est_ok & n_dr3)/n_mag_est_ok)
  • f_dbox5: Fraction of mag-est-ok samples with centroid within 5 arcsec box((mag_est_ok & n_dbox5)/n_mag_est_ok)
  • f_mag_est_ok: n_mag_est_ok_3/n_kalman. This is a measure of the fraction of time during an observation that a magnitude estimate is available.
  • f_mag_est_ok_3: n_mag_est_ok_3/n_kalman.
  • f_mag_est_ok_5: n_mag_est_ok_5/n_kalman.
  • f_ok: n_ok_5 / n_kalman. Same as f_ok_5
  • f_ok_3: n_ok_3 / n_kalman. This is a measure of the fraction of time during an observation that the Kalman filter is getting high-quality star centroids.
  • f_ok_5: n_ok_5 / n_kalman. This is a measure of the fraction of time during an observation that the Kalman filter is getting any star centroid at all. This includes measurements out to 5 arcsec box halfwidth, so potentially 7 arcsec radial offset.