Selv

Provided the correct GM and Omega, it will use SGRAV.TXT file to create the surface elevation (same as geoid).

Files (Required)

• SGRAV.TXT

Input - stdin

• This is sometimes contained in MGRAV.IN

• What it asks for

   GM (km^3/s^2), Omega (deg/day)
     1.728e10
     1617.250674

Output

• some large negative number (e.g. -65890511.606425241)

• SHAPEFILES/GEOID.TXT - gives the geoid in X, Y, Z position. A 3 column file.

• SHAPEFILES/SHAPEC.TXT - gives the height above the surface. A 4 column file.