The program called through this menu is used to show the details of the meteorological data file contained in the index record as well as a listing of the header portion (first 50 bytes) of each data record. The output is written to a text file called chkfile.txt. More detailed information about the structure of a meteorological data file is available. The check file program uses the same library routines as HYSPLIT. Therefore if this program does not work with the meteorological data file, neither will HYSPLIT.