F I T S E T Function: Figaro routine to set (or modify) a FITS keyword in a file. Description: This routine allows a FITS keyword in a file to be set or, if it already exists, to be modified. This routine is needed mainly because of the difficulty of changing items in a FITS header when the file in question is in NDF format. (A .DST file has the FITS information in separate structure items which can easily be modified using LET, but an NDF format file has all the FITS keywords in a single character array which is not amenable to such changes.) Invocation: FITSET file keyword value comment [logical] [string] Parameters: file (Filename) The name of the Figaro format file in which the keyword is to be set. keyword (Character string) The name of the FITS keyword that is to be set. value (Character string) The new value of the FITS keyword. If this can be interpreted as a numeric value it will be set as such. Otherwise it will be kept as a character string. comment (Character string) The comment to be associated with the keyword. logical (Keyword) If set, forces the value to be treated as a logical value, in which case it must be one of 'T' or 'F' and will be set as such in the output file. string (Keyword) If set, forces the value to be treated as a literal string; in this case it will not be treated as a number even if it can be. Keith Shortridge, AAO.
FIGARO A general data reduction system