Monthly Analysis of Global Land Precipitation from 1948 to the Present (PREC/L)

1.  filename 
    
    precl_mon_v1.0.txt.yyyy
    ( yyyy = 1948 - 2002 ) 

2.  description of the data 
    
    1)  content: 
        kyr    ==  year  ( 1948 - 2002 )  
        kmn    ==  month (1 - 12)  
        rlat   ==  latitude  (-88.75 --> 88.75)     
        rlon   ==  longitude (eastward from 1.25 E)   
        rain   ==  monthly precipitation based on gauge observations from
                GHCN version 2B and CAMS in (0.1 mm/day)
                (e.g. 234.0 is 23.4 mm/day);
        gauge_num == number of gauges in the grid box;
     
    2)  coverage: 
        -88.75S -- 88.75N; 1.25E -> Eastward -> 1.25W 

    3)  resolution: 
        2.5 deg lat x 2.5 deg lon 
        monthly  
  
    4)  missing values 
        -999.0  

3.  example program   
    
c     program     :     example.f  
c     objective   :     to read the PREC/L data for 1948    
c 
      dimension    rain(144,72),gauge_num(144,72)  
c
c     1.  to open the data file 
c
      open  (unit=10,file='precl_mon_v1.0.txt.1948', 
     #       access='sequential',status='old',form='formatted') 
c
c     2.  to read the data 
c 
      do 2001 kmon=1,12    
      do 2001 jj=1,72 
      do 2001 ii=1,144 
        read  (10,2901)  kyr,kmn,rlat,rlon, 
     #                   rain(ii,jj),gauge_num(ii,jj) 
 2001 continue 
 2901 format  (2i4,2f8.2,2f8.2) 
c
      stop 
      end