Input files information:

for the programs dae.f, dte.f, ste.f, pte.f:

  1) file with 5 x 5' digital terrain model data
     format 1 (see below)
     units [m * 10]
  2) file with 30 x 60" digital terrain model data
     format 1 (see below)
     units [m * 10]

for the programs dtf.f, stf.f, ptf.f:

  1) spherical harmonic coefficients of the global topography
     complete to degree and order 180 based on TUG87: hgt1.cof
  2) spherical harmonic coefficients of the sqared global topography 
     complete to degree and order 90 based on TUG87: hgt2.cof
  3a) dte values (output file from dte.f)
  or
  3b) ste values (output file from ste.f)
  or
  3c) pte values (output file from pte.f)

for the program gin.f:

  1) gravity anomaly file
     format 1 (see below) 
     units [mGal * 1000]

description of the format 1

line

1. description of the file
2. empty line
3. latmin lonmin latmax lonmax (deg. min. sec.)
   (longitude must be positive eastern)
4. step in lat. step in lon. (sec.)
5. number of rows number of columns
6. empty line
7. lat (deg. min. sec.)
8. value1 value2 ...
   (values must be ordered from south to north and from west to east,
    values must be organised in blocks, one block should contains
    values with the same latitude, each line in the block should
    contains 10 values except the last line in block, which contains
    the rest of the values, every block should start with actual
    latitude (as in the line 7).