The CHEOPS software uses the information passed from FATMEN to stage in files pending transfer to the requested remote site. Similar, once the file has been transferred, a request is made through the FATMEN software to stage the file out to tape.
To simplify the interface between the CHEOPS software, written in C, and the FATMEN package, written primarily in FORTRAN, a special interface has been provided. This interface is intended only for use by the appropriate CHEOPS software and should not be called from user programs.