TESTS/CCD

The command determines the shutter error distribution. The error distribution is computed as follows. If has a total reported exposure time of t1 seconds, and the shutter is opened and closed times (including the beginning and end of the exposure) and img2 has a total exposure time of t2 seconds, and the shutter is only opened and closed once, then the final shutter error frame is determined by:

(17)

An image and a contour plot of the error frame are produced.