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The command does a series of tests on a catalogue of bias frames.
Since this commands produce the bias offset that is needed in most
of the other test commands (( e.g. TESTF/CCD and
TESTD/CCD),
it should be the first command to be executed. It produces the following:
- A combined bias frame.
- A map of hot pixels in bias frames (obtained from a median
stack of the raw bias frames);
- An ASCII and a MIDAS table containing the hot pixels;
- Plots of row and column averages of the mean bias;
- The mean bias level and standard deviations after hot
pixel correction median filtering.
In order to make this test useful a minimum of 5 bias frames is
recommended. The mean bias level and the standard deviation of the
mean are stored in the keywords BIASMEAN and BIASSIGM.
Pascal Ballester
Tue Mar 28 16:52:29 MET DST 1995