Probably the easiest method to extract a station (or an area), because the
data is arranged by year/WMO block and because the volume is so big, is as
follows,

     1. If by station numbers (BBnnnn), the WMO block numbers are the first
        two digits (BB).

        If by area, determine all block number(s) in area, by looking at,

                station_libraries (block number is leftmost two digits of USAF id number;
			     don't forget 99nnnn stations at end of library;
			     NOTE: 999999 numbers in this set are not in the
				   library and are distinguished by call letters)

     2. Then go to,
                inventories

        click on desired year,  e.g. 1999, and

        find file names for block number(s), e.g. block72.199901-199906.Z
                                                  block72.199907-199912.Z

     3. To find the mass store files containing this year go to,

                MSS files

        e.g. Y76578         1999 datsav3,   1.68Gb

     4. To get data from mass store,

                msread -ftr mydata.1999.tar /DSS/Y76578

     5. Select out files containing your block number,

        e.g.    tar -xvf mydata.1999.tar block72.199901-199906.Z
                tar -xvf mydata.1999.tar block72.199907-199912.Z

     6. If you do not have your own software, you may use the following
        software to read the data (but modify to select out the reports
        you want),

                read_datsav.f

        as follows,

                f77 read_datsav.f
                zcat block72.199901-199906.Z| a.out >! mydata.part1
                zcat block72.199907-199912.Z| a.out >! mydata.part2