GDDELT deletes grids from GEMPAK grid files. INPUT PARAMETERS GDFILE *Grid file GDNUM *Grid numbers PROGRAM DESCRIPTION GDDELT deletes grids from GEMPAK grid files. The variable GDNUM specifies the grids to be deleted. GDNUM can be either a range or a list of individual grids numbers. If GDNUM = ALL, all the grids in the file will be deleted. If GDNUM = LIST, all the grids in the file are listed and the user is prompted to select the grids to be deleted. Note that the grid numbers for the remaining grids will change each time the program is run. EXAMPLES 1. Delete grids 3, 4, and 5 from a grid file. GDFILE = ngm.grd GDNUM = 3-5 2. Delete grids 3, 6, and 8 from SFC.GRD. GDFILE = sfc.grd GDNUM = 3;6;8 3. Delete all the grids from the file TODAY.GRD. GDFILE = today.grd GDNUM = all ERROR MESSAGES [GDDELT -1] Fatal error initializing TAE. [GDDELT -2] Fatal error reading TAE parameters. [GDDELT -3] Invalid grid range entered. [GDDELT -4] Grid number ... is invalid. [GDDELT -5] There are no grids in file .... [GDDELT -6] No valid grids in list.