**********************************
     **  update on 10 November 2010  **
     **********************************


** Files **
merisTOTL01_412.dat  -- monthly black sky albedo (BSA) values for month 01
                        (January) and wavelength 412 nm
quality_flags_01.dat -- file with flags corresponding to the TOTL-files

The BSA values are three digit integers, and should be divided by 1000 to 
obtain the BSA in the range (0,1). The format resembles the well-known 
TOMS format.


** Fortran subroutine to read the files **
      subroutine rd_cscdb(filename,header,iler)
      implicit none
      integer i,j
      character*100 filename
      character*75 header(3)
      character*14 string
      integer iler(180,360)
      open(10,file=filename)
      do i=1,3
         read(10,'(a)') header(i)
      enddo
      do i=1,180
         read(10,91) (iler(i,j),j=1,360),string
      enddo
      close(10)
  91  format(14(25i3/),10i3,a14)
      return
      end


** Meaning of values in FLAG files **
------------------
FLAG   EXPLANATION
------------------
0      Snow- and ice-free land pixels
1-100  Snow fraction (compiled from the MODIS MOD10 - Snow cover product)
240    Water pixels filled with GOME-1 surface LER values
250    Filled with value from closest month

VALUE+10 Residual cloud contamination likely in final data