Calibration Access and Data Handbook

Procedure

Corrects rawX & rawY as obtained from the telemetry for windowing and pre-scan, such that they are consistent with the convention used within the SAS, where rawX & rawY start counting from 1 for the first physical pixel on the CCD. Consequently pre-scan pixels have values of $\tt rawX < 1$.

Note that nominally the commanding will be such that the first physical bin on the CCD has coordinates (0,0) in the telemetry. If a window is applied by re-programming the clock sequence generator, also supply the correct coordinates will be loaded to the DPP such that the on-board hot pixel lookup table does not have to be re-loaded.

The physical size of the first bin depends on the OCB. E.g. for $\rm ODB=3\times 3$, the fist bin contains only 2 pixels.