PFH is a simple program to interpret the "Pacsat File Header" that is on front of each file received from the PACSATs. It can also add a Pacsat File Header to your existing file, so that it can be uploaded to a PACSAT The program has been written in C, with portability in mind It runs on both little-endian (8086) and big-endian (68000) machines For all display and directory modes the program operates entirely command-line driven, allowing the use in batchfiles. When the a option (add Pacsat File Header) is used, the program prompts for values to be used in the header