AGASC ID 897588384

Info

Last Obs. 2024:187:18:24
magcatalog 9.48 ± 0.53
mag3 arcsec 9.61 ± 0.06
mag5 arcsec 9.61 ± 0.06
Nobs 10 (0 bad)
fok 99.6%
f3 arcsec 97.5%
f5 arcsec 99.9%

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
29459 2024:174:08:52:53.684 7 -76.9 427.9 3818 3742 0 99.7% 94.0% 99.3% 93.7% 0.25 9.52 0.00 --
28865 2024:176:16:05:57.573 6 83.0 424.6 3599 3538 1 99.9% 93.5% 99.9% 93.5% 0.19 9.57 0.00 --
29467 2024:177:08:58:18.393 6 128.3 412.0 3621 3548 4 99.9% 99.5% 100.0% 99.4% 0.14 9.57 0.00 --
29468 2024:181:13:28:23.841 6 359.5 -197.8 3545 3468 1 99.9% 97.7% 100.0% 97.7% 0.15 9.60 0.00 --
29469 2024:182:11:55:25.807 6 325.7 -243.6 2640 2526 2 98.0% 98.3% 99.4% 96.3% 0.13 9.64 0.00 --
28866 2024:184:05:51:50.521 6 288.5 -288.3 3786 3728 16 99.9% 99.8% 100.0% 99.7% 0.15 9.65 0.00 --
29472 2024:185:04:03:40.783 6 277.0 -301.4 3785 3729 2 99.8% 96.2% 99.9% 95.9% 0.14 9.64 0.00 --
29473 2024:185:21:02:15.763 6 267.6 -309.6 3753 3702 2 99.8% 99.3% 100.0% 99.1% 0.15 9.66 0.00 --
29474 2024:187:04:51:05.458 6 256.2 -318.9 3810 3760 1 99.9% 98.6% 100.0% 98.5% 0.18 9.63 0.00 --
29475 2024:187:18:24:57.136 6 251.7 -322.1 2710 2662 1 99.6% 98.9% 99.9% 98.5% 0.15 9.62 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.