String containing the name of the file to be read. Data range to read in the second dimension. Step size to use in reading the data. Default value is 1. Ignored if less than 1.
Data array to be read from the file.
String array containing the header for the FITS file. Value signalling data dropout. Ignored unless DATA is of type float or double-precision. If set, then the optional parameters are prompted for at the keyboard. If set, then the array size is reduced by averaging pixels together rather than by subselecting pixels.