AGASC ID 845026496

Info

Last Obs. 2024:040:22:55
magcatalog 7.27 ± 0.10
mag3 arcsec 7.30 ± 0.01
mag5 arcsec 7.30 ± 0.01
Nobs 9 (0 bad)
fok 99.4%
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
7277 2006:050:10:22:10.731 4 448.4 67.7 7419 7318 3 100.0% 100.0% 100.0% 100.0% 0.01 7.29 0.00 --
48879 2018:298:14:00:11.813 5 359.8 -134.3 731 677 0 100.0% 100.0% 100.0% 100.0% 0.01 7.29 0.00 --
48877 2018:298:16:00:05.500 5 359.8 -134.3 462 382 0 100.0% 100.0% 100.0% 100.0% 0.02 7.29 0.00 --
48873 2018:298:19:59:53.488 5 359.8 -134.3 461 385 0 100.0% 100.0% 100.0% 100.0% 0.01 7.29 0.00 --
48871 2018:298:21:59:35.125 5 359.8 -134.3 475 403 1 100.0% 100.0% 100.0% 100.0% 0.01 7.29 0.00 --
21473 2018:340:15:04:10.837 6 407.2 -43.8 2589 2512 1 100.0% 100.0% 100.0% 100.0% 0.01 7.30 0.00 --
45428 2022:165:04:39:01.169 0 395.4 -129.1 8110 7934 25 98.5% 100.0% 100.0% 98.4% 0.02 7.31 0.00 --
43717 2024:040:21:12:27.717 0 99.9 207.6 502 448 1 99.8% 100.0% 100.0% 99.8% 0.02 7.31 0.00 --
43715 2024:040:22:55:36.000 0 100.1 207.5 502 444 3 99.6% 100.0% 100.0% 99.6% 0.02 7.31 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.