Original archive format used for SF6 concentration data

Header Record for each day: 
MMDDYY        Key                Num   YYJJJ
 42080 000000000000011100000000  140   80111

MM  = Month, DD=Day, YY=last two digits of year
Key = 24 values to indicate when SF6 samples are available [0=no samples, 1=samples available]
Num = Number of receptors for this day
YY  = last two digits of year
JJJ = Julian day number


For each receptor there are two (2) lines of data:
  DD.ID    UTM-E   UTM-W  Hgt   Conc (twelve values)
   3.0002  289.05 4385.25 183. -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9                   

                                Conc (twelve values)
                               -999.9     .0   50.4     .0 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9                   

Line 1: DD    = Nominal distance to receptor 
                (Note: A DD value of 99, is used for receptors that 
                were deemed to likely be redundate).
        ID    = ID of receptor along the arc.
        UTM-E = East-West Universal Mecador Transverse Coordinate (km).
        UTM-N = North-South Universal Mecador Transverse Coordinate (km).
        Conc  = SF6 concentration values (PPB) for hours 1 through 12.

Line 2: Conc  = SF6 concentration values (PPB) for hours 13 through 24.
        


Example:
  42080 000000000000011100000000     3   80111                                                                                        
   3.0002  289.05 4385.25 183. -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9                   
                               -999.9     .0   50.4     .0 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9                   
   3.0003  289.05 4385.37 183. -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9                   
                               -999.9   45.9    5.5   17.0 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9                   
   3.0004  289.05 4385.48 183. -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9                   
                               -999.9 -999.9   75.0 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 -999.9 

 

           FORTRAN STATEMENT TO READ HEADER RECORD
            READ(ISF6,1000) month,day,year,key,num,jday
      1000  FORMAT(3i2,1x,24i1,3x,i3,5x,i5)

            FORTRAN STATEMENTS TO READ DATA FOR DAY
            do i=1,NUM
            READ(ISF6,1010) (Receptor(i,j),j=1,4),(Conc(i,k),k=1,12)
       1010 FORMAT(f8.4,2f8.2,f5.0,12f7.1)
            READ(ISF6,1020) (Conc(i,k),k=13,24)
       1020 FORMAT(29x,12f7.1)
            end do