Background

All GBT scan data FITS files should conform to the standards specified in the GBT Software Project Note 4.0, ``Device and Log FITS Files for the GBT.'' There are two identical Berkeley Caltech Pulsar Machines (BCPM) available for use with the GBT. An observer may use one or both of these machines, which are refered to as BCPM1 and BCPM2. Each BCPM generates it's own FITS file. These FITS files only contain header information, which is useful for recording the set-up of the machine during an observation. The data taken during an observation is saved in a non-FITS file by a software package developed by the Penn State Pulsar Group and later modified by the Berkeley-Caltech team for use with the BCPM.