SNSTNS modifies the station information in an upper air file. INPUT PARAMETERS SNFILE *Sounding data file STNFIL *Station information file ADDSTN *Add station flag IDNTYP *STNM or STID PROGRAM DESCRIPTION SNSTNS updates the station information in a GEMPAK upper air file. The station information generally consists of the character station identifier, STID, the station number, STNM, the latitude, SLAT, the longitude, SLON, the elevation, SELV, the state, STAT and the country, COUN. This information, along with the station name, which is not used, must be stored in a fixed format in the table file specified in STNFIL. The current GEMPAK upper air station table for US, Canadian and Mexican stations is GEMTABL:SNSTNS.TBL. An upper air file containing stations for the world is GEMTABL:SNWORLD.TBL. ADDSTN is a logical parameter which indicates whether stations which are in the table file but not already in the upper air file will also be added to the upper air file, provided there is room for them. Either STID or STNM may be used to key on the desired station identifier by setting the desired value in IDNTYP. EXAMPLES 1. Update upper air file called SOUNDINGS.DAT with station information from MYSTN.DAT adding stations that are not already in the file. SNFILE = soundings.dat STNFIL = mystn.dat ADDSTN = yes IDNTYP = stid ERROR MESSAGES [SNSTNS +1] WARNING! No stations were updated. [SNSTNS -1] Fatal error initializing TAE. [SNSTNS -2] Fatal error reading TAE parameters. [SNSTNS -3] Invalid input for IDNTYP; must be STID or STNM. [SNSTNS -4] STNFIL ... cannot be opened.