AGASC ID 895488896

Info

Last Obs. 2022:172:20:22
magcatalog 8.75 ± 0.23
mag3 arcsec 8.68 ± 0.02
mag5 arcsec 8.68 ± 0.02
Nobs 12 (0 bad)
fok 98.8%
f3 arcsec 100.0%
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
23994 2021:255:21:47:27.232 5 -448.3 14.9 2642 2565 2 97.1% 100.0% 100.0% 97.1% 0.03 8.70 0.00 --
23995 2021:255:23:57:18.074 4 -280.8 -106.8 2669 2656 5 99.5% 100.0% 100.0% 99.5% 0.03 8.67 0.00 --
23996 2021:256:01:33:48.074 4 -238.3 76.5 2671 2660 2 99.6% 100.0% 100.0% 99.6% 0.03 8.69 0.00 --
23997 2021:256:03:10:18.074 5 -73.5 -38.2 2669 2651 6 99.3% 100.0% 100.0% 99.3% 0.03 8.67 0.00 --
23998 2021:256:04:46:48.074 4 -26.3 157.0 2671 2612 0 97.8% 100.0% 100.0% 97.8% 0.03 8.68 0.00 --
23993 2021:258:08:42:56.659 5 -442.5 -246.9 2646 2629 1 99.4% 100.0% 100.0% 99.4% 0.05 8.66 0.00 --
23999 2022:164:10:30:26.808 7 -68.4 152.9 2639 2586 0 98.0% 100.0% 100.0% 98.0% 0.04 8.66 0.00 --
24001 2022:164:14:10:24.648 6 -240.9 240.9 2671 2636 2 98.7% 100.0% 100.0% 98.7% 0.05 8.67 0.00 --
24002 2022:165:00:58:13.429 6 -355.1 128.9 2634 2593 1 98.4% 100.0% 100.0% 98.4% 0.04 8.68 0.00 --
24003 2022:165:03:00:25.271 7 -489.6 25.3 2669 2635 6 98.8% 100.0% 100.0% 98.8% 0.03 8.68 0.00 --
24052 2022:166:05:23:16.678 4 -328.8 -32.9 2644 2635 2 99.7% 100.0% 100.0% 99.7% 0.05 8.70 0.00 --
24038 2022:172:20:22:55.128 5 -44.0 -420.4 2666 2642 1 99.1% 100.0% 100.0% 99.1% 0.02 8.66 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.