Accession Number : AD0759536

Title :   Determination of Surface Densities from a Combination of Gravimetry and Satellite Altimetry,

Corporate Author : OHIO STATE UNIV COLUMBUS DEPT OF GEODETIC SCIENCE

Personal Author(s) : Isner,John F.

Report Date : DEC 1972

Pagination or Media Count : 67

Abstract : The use of satellite altimetry by itself, and in combination with existing gravity material is considered for the determination of the gravity field of the earth. This is done by developing equations that relate surface density values defined in discrete blocks to geoid undulations and gravity anomalies. The use of a higher order reference field defined by a set of spherical harmonics is considered and truncation errors are computed when the contribution of an area outside a spherical cap is obtained from a spherical harmonic expansion of the anomaly field. A suggested solution to recover 5 degree equal area blocks is made with specific recommendations made on the ordering of these blocks so that structured sets of normal equations will result. The determination of a more local field (such as 1 degree) is discussed using the global 5 degrees field as a basis. (Author)

Descriptors :   (*GRAVITY, MEASUREMENT), SCIENTIFIC SATELLITES, ORBITS, HARMONIC ANALYSIS, MATHEMATICAL MODELS, THESES

Subject Categories : Geodesy

Distribution Statement : APPROVED FOR PUBLIC RELEASE