NB : this material is not part of the official distribution

Handling celestial coordinates

A suite of programs allows to convert image pixel positions to celestial coordinates (RA Dec) and to handle attitude information. These programs usually (but not necessarily) work in conjunction with a plotted image.
The programs and procedures currently available are : Note that for most programs we indicate the relevant syntax as :
command [mandatory {detnam pixsize} {ra dec roll} {alpha beta gamma}
This implies that the optional arguments may or may be not required. The program will make the best attempt to retrieve arguments in braces from the header of the last plotted image, or from the appropriate calibration file. If the information is not available, or if the use of the image has been disabled, then the information must be supplied to the user