10(1X,E13.6): 1-degree-square mean geoid or EWH height differences (in METERS) between a gravity field at a given time and a static reference field.
6480 lines ; 64800 mean values ( 1deg. x 1deg. ) sorted by row from left to right, starting from longitude -179.5, latitude 89.5.(The first 360 values concern latitude 89.5, the next 360 latitude 88.5, etc.)
Latitudes are ellipsoidal (geodetic) latitudes.