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ACA Trending: Oct 2026

Click an image to enlarge it. The slopes are in Mag / day.

ACIS
Slope: -1.206e-05 STD: 5.684e-02

Slope: -7.487e-03 STD: 9.007e-02

Slope: -1.339e-03 STD: 6.741e-02
 

Slope: -3.451e-03 STD: 6.758e-02

Slope: -2.586e-03 STD: 6.572e-02

Slope: 7.475e-04 STD: 8.312e-02
 
HRCI
Slope: -4.482e-03 STD: 1.820e-02

Slope: -1.212e-03 STD: 2.005e-02

Slope: -1.000e-03 STD: 2.010e-02

Slope: -4.636e-05 STD: 6.088e-03
HRCS
Slope: -2.411e-03 STD: 1.342e-02

Slope: -1.375e-03 STD: 1.201e-02

Slope: -1.844e-03 STD: 1.262e-02

Slope: nan STD: nan
IDID StringMagnitudeData Quality (%)Total Data
AverageMinMaxGoodMarginalBad
1 ACIS-1 7.236 4.809 7.370 100 0 0 59
2 ACIS-2 7.105 6.305 7.324 100 0 0 39
3 ACIS-3 7.403 7.001 7.548 100 0 0 46
4 ACIS-4 7.197 6.628 7.348 100 0 0 46
5 ACIS-5 7.191 6.367 7.358 97 0 2 85
6 ACIS-6 7.244 6.917 7.429 96 0 4 25
7 HRC-I-1 6.819 6.628 6.862 100 0 0 6
8 HRC-I-2 6.854 6.242 6.905 100 0 0 7
9 HRC-I-3 6.881 6.827 6.930 100 0 0 5
10 HRC-I-4 6.808 6.624 6.836 100 0 0 3
11 HRC-S-1 6.812 6.714 6.840 100 0 0 4
12 HRC-S-2 6.820 6.610 6.855 100 0 0 5
13 HRC-S-3 6.863 6.787 6.890 100 0 0 5
14 HRC-S-4 6.823 6.784 6.839 100 0 0 1

Level 1 Slot Trending: Oct 2026

Click an image to enlarge it. The slopes are per day.

SlotPos_ErrDelta MagnitudeAngyneaAngznea
0
Slope: nan STD: 8.957e-03

Slope: nan STD: 8.957e-03

Slope: -1.862e-05 STD: -5.852e-05

Slope: -5.852e-05 STD: 1.031e-03
1
Slope: nan STD: 9.174e-02

Slope: nan STD: 9.174e-02

Slope: -5.043e-05 STD: -1.191e-04

Slope: -1.191e-04 STD: 1.362e-03
2
Slope: nan STD: 1.682e-02

Slope: nan STD: 1.682e-02

Slope: 1.864e-05 STD: -4.664e-07

Slope: -4.664e-07 STD: 1.959e-03
3
Slope: 6.247e-05 STD: 2.358e-02

Slope: 6.247e-05 STD: 2.358e-02

Slope: -1.545e-04 STD: -1.561e-04

Slope: -1.561e-04 STD: 7.916e-03
4
Slope: 5.120e-04 STD: 2.702e-02

Slope: 5.120e-04 STD: 2.702e-02

Slope: -2.355e-04 STD: -1.229e-04

Slope: -1.229e-04 STD: 7.925e-03
5
Slope: 3.663e-04 STD: 1.927e-02

Slope: 3.663e-04 STD: 1.927e-02

Slope: -2.461e-04 STD: -2.014e-04

Slope: -2.014e-04 STD: 8.724e-03
6
Slope: 3.587e-04 STD: 3.484e-02

Slope: 3.587e-04 STD: 3.484e-02

Slope: -1.324e-04 STD: -9.998e-05

Slope: -9.998e-05 STD: 1.189e-02
7
Slope: -2.827e-04 STD: 1.480e-02

Slope: -2.827e-04 STD: 1.480e-02

Slope: 8.062e-04 STD: 4.450e-04

Slope: 4.450e-04 STD: 5.471e-02

Note

pos_err: ((ra_err*cos(dec))^2 + dec_err^2)^0.5
diff: mag_aca - mag_aca_avg
slope: slope agaist time (sec)
std: standard deviation of the data

When looking at Guide Stars

slotrms_ra_err (deg)rms_dec_err (deg) rms_delta_mag (marcsec)number avg_angynea (arcsec)avg_angznea (arcsec) number_nea goodmarginalbad
00.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
10.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
20.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
31.445e-051.623e-055.041e-03 1093.057e-022.924e-02368557100.000.000.00
41.289e-051.482e-055.782e-03 1093.422e-023.366e-02368563100.000.000.00
51.500e-051.596e-056.179e-03 1093.851e-023.878e-02368529100.000.000.00
61.258e-051.809e-057.793e-03 1094.592e-024.712e-02368478100.000.000.00
71.322e-051.594e-056.947e-03 1045.341e-025.236e-02363608100.000.000.00
AVG8.517e-061.013e-053.968e-03 672.533e-022.515e-0222971662.500.000.00

When Looking at FIDs

slotrms_ra_err (deg)rms_dec_err (deg) rms_delta_mag (marcsec)number avg_angynea (arcsec)avg_angznea (arcsec) number_nea goodmarginalbad
00.000e+000.000e+001.129e-01 1121.013e-021.193e-02368549100.000.000.00
10.000e+000.000e+001.063e-01 1121.103e-021.359e-02368545100.000.000.00
20.000e+000.000e+001.128e-01 1121.083e-021.337e-0236529397.320.002.68
30.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
40.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
50.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
60.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
70.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
AVG0.000e+000.000e+004.150e-02 423.999e-034.861e-0313779837.170.000.33

When looking at Monitor Stars

slotrms_ra_err (deg)rms_dec_err (deg) rms_delta_mag (marcsec)number avg_angynea (arcsec)avg_angznea (arcsec) number_nea goodmarginalbad
00.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
10.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
20.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
30.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
40.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
50.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
60.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
70.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00
AVG0.000e+000.000e+000.000e+00 00.000e+000.000e+00 00.000.000.00

If you have any questions about this page, please contact swolk@cfa.harvard.edu.