DOWNWARD CONTINUATION OF GRAVITY INFORMATION FROM SATELLITE TO SATELLITE TRACKING OR SATELLITE GRADIOMETRY IN LOCAL AREAS

摘要

The derivation of gravity anomalies at the surface of the earth from satellite to scatellite tracking or satellite gradiometry observations is a downward continuation problem.nFor a local improvement of our knowledge about the gravity field integral formulas in the parameter domain have to be applied instead of a representation by spherical harmonics. The neglected regions will cause a truncation error. The application of the discrete form of the integral equations connecting the satellite observations with surface gravity anomalies is discussed in comparison with the least squares prediction method.