L.3 Table of Number of SXT Images and Dark Current Levels
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PROGRESS_SUMMARY.PRO Ver 2.2 12-Aug-93
Program Run: 11-Jan-1994 23:21:16.00
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Month Full Frame Images Observing Region Images
Received Lost Received Lost Loss %
QT FL Tot
Sep-91 517 397 21174 3541 24715 5481 18.15
Oct-91 4106 2532 6393 12437 18830 3401 15.30
Nov-91 5291 2475 12149 14696 26845 10952 28.98
Dec-91 4858 3228 4983 16837 21820 6910 24.05
Jan-92 5544 3177 10084 5972 16056 6849 29.90
Feb-92 5305 2803 16932 11382 28314 12019 29.80
Mar-92 6248 2361 20367 2653 23020 9458 29.12
Apr-92 6734 3500 20094 5423 25517 12390 32.69
May-92 7032 3158 25464 4589 30053 13745 31.38
Jun-92 6937 3112 23307 13221 36528 12627 25.69
Jul-92 6345 3275 23941 10510 34451 14717 29.93
Aug-92 6572 2978 24207 11154 35361 13550 27.70
Sep-92 6087 2916 26832 20042 46874 15729 25.12
Oct-92 6743 2589 50985 14709 65694 23687 26.50
Nov-92 6658 2939 24416 14696 39112 12924 24.84
Dec-92 6775 2999 24253 6633 30886 12356 28.57
Jan-93 6888 3351 24067 4861 28928 13069 31.12
Feb-93 6833 3004 24479 18149 42628 12302 22.40
Mar-93 7177 3460 25874 19537 45411 14657 24.40
Apr-93 7754 3644 34128 8352 42480 17967 29.72
May-93 8571 3950 41832 7518 49350 21971 30.81
Jun-93 7340 2589 64545 12539 77084 26299 25.44
Jul-93 8259 3650 47561 5352 52913 24213 31.39
Aug-93 7628 3638 30705 3563 34268 17436 33.72
Sep-93 6875 2899 22697 5600 28297 11252 28.45
Oct-93 7474 3657 33782 7548 41330 20104 32.72
Nov-93 8353 4015 42180 5849 48029 24669 33.93
Dec-93 5143 2777 17806 8640 26446 11503 30.31
Jan-94 0 0 0 0 0 0 30.31
Total 180047 85073 745237 276003 1021240 402237 28.26
Number of Full Frame Images Received: 180047
Number of Observing Region Images Received: 1021240
Total: 1201287
Approximate Number of Shutter Moves/CCD Readouts: 2128671
NOTES: * The loss of images is mainly due to BDR overwrites, but there are also
occasional DSN dumps which are lost.
* It is common to have observing regions which contain more than 64
lines, which requires multiple exposures to make a single observing
region image. This is why the number of shutter moves is larger
than the number of images received plus those lost.
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Month Avg Dark Level # of Dark Spikes CCD Warmings Front Optical
(DN) (e/sec) Over 48 Over 64 High / # Support Trans
Temp /Days Temp (%)
Oct-91 31.07 21.3 509 261 10.5 77.8
Nov-91 31.06 20.9 648 277 11.9 64.4
Dec-91 31.04 20.2 804 353 14.0 52.5
Jan-92 31.13 23.6 985 450 0.5 / 2 14.9 38.4
Feb-92 31.32 30.8 1176 544 14.3 31.7
Mar-92 31.47 36.5 1355 626 14.8 25.1
Apr-92 31.44 35.2 1323 610 23.8 / 4 14.6 22.8
May-92 31.65 43.1 1417 653 14.4 20.1
Jun-92 32.12 60.9 2215 880 -2.5 / 3 15.1 17.4
Jul-92 32.22 64.4 1852 832 15.5 14.1
Aug-92 32.21 64.1 1922 886 14.9 13.1
Sep-92 32.38 70.5 2062 954 -1.2 / 3 15.9 12.2
Oct-92 32.64 80.3 2317 1055 16.8 11.5
Nov-92 36.24 215.1 6112 1391 18.0 11.0
Dec-92 42.58 452.8 17390 2024 17.9 N/A
Jan-93 42.59 453.1 13006 2034 23.8 / 2 19.2 N/A
Feb-93 42.28 441.5 13895 2090 17.7 N/A
Mar-93 43.14 473.8 14047 2151 17.7 N/A
Apr-93 43.13 473.4 14304 2146 23.8 / 2 16.9 N/A
May-93 43.45 485.3 16405 2357 17.3 N/A
Jun-93 44.03 507.2 20037 2531 16.3 N/A
Jul-93 44.52 525.6 23977 2700 22.5 / 2 17.7 N/A
Aug-93 44.24 515.0 21879 2643 25.2 / 3 17.2 N/A
Sep-93 45.07 546.2 27469 2745 17.5 N/A
Oct-93 45.40 558.6 31684 2982 17.7 N/A
Nov-93 45.31 554.9 31892 3224 23.8 / 3 19.7 N/A
Dec-93 45.86 575.7 37517 3057 19.0 N/A
Jan-94 N/A N/A N/A N/A 0.0 N/A
NOTES: * The dark current calculations are using full half resolution 2.668 sec
images not taken in during the SAA. The dark current rate assumes a
"fat zero" of 30.5 DN and a gain of 100 e/DN.
* The entrance filter failure of 13-Nov-92 eliminated the capability of
taking optical images, so the optical transmission is not available
after Nov-92. It also caused an increase in the dark current signal,
however some of the increase shown here is an increase in the readout
noise and is not a function of exposure duration.
ydac@mssly1.mssl.ucl.ac.uk