Description:
This function opens an existing FITS file with a path obtained from the environment, and returns a
logical unit number that can be used to access it using CVG and FITSIO functions.
Invocation
CALL
CVG_ASSOC( PARAM, MODE, FUNIT, BLOCKF, STATUS )
Arguments
PARAM = CHARACTER
∗ (
∗ )
(Given)
The name of the environemt parameter to use.
MODE = CHARACTER
∗ (
∗ )
(Given)
The access mode: ’ READ’ or ’ UPDATE. Case insensitive. Abbreviations can be
used.
FUNIT = INTEGER (Returned)
The logical unit number of the FITS file. Returned
equal to CVG_NOLUN if an error occurs.
BLOCKF = INTEGER (Returned)
The logical
record blocking factor.
STATUS = INTEGER (Given and Returned)
The global status.