This routine will overwrite the value of a specified FITS character keyword held in the FITS extension of an NDF file. The FITS extension must have been read into the input array FITS before this routine is called and be written out again afterwards for the change to take effect.

The routine assumes that each line in the FITS array will contain a string with format:-

"KEYWORD=’VALUE’ / this is a comment"

It will search the input array for a line containing the required keyword and replace VALUE. If the keyword is not found an error will be reported and bad status returned. If the keyword is found but the line does not conform to the above format an error will be reported and bad status returned.

CALL SCULIB_REWRITE_FITS_C (MAX_FITS, N_FITS, FITS, NAME, VALUE, STATUS)

MAX_FITS = INTEGER (Given)

N_FITS = INTEGER (Given)

FITS (MAX_FITS) = CHARACTER$\ast$($\ast$) (Given and returned)

NAME = CHARACTER$\ast$($\ast$) (Given)

VALUE = CHARACTER$\ast$($\ast$) (Given)

STATUS = INTEGER (Given and returned)

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