Local Geoid and Gravity Anomaly Predictions Using Point Masses.

The point mass technique, which supplements a spherical harmonic expansion of the potential, allows short wavelength detail to be added to previously computed long wavelength geoidal features without distorting the latter. Recently, the AFGL short-arc approach to satellite altimetry has been modifie...

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Bibliographic Details
Main Authors: Blaha,Georges, Hadgigeorge,George
Other Authors: AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA
Format: Text
Language:English
Published: 1979
Subjects:
Geodesy
*EARTH ORBITS
*GEODESY
*ALTIMETERS
MATRICES(MATHEMATICS)
COEFFICIENTS
PERTURBATIONS
GEOIDS
GRAVITY ANOMALIES
HARMONIC ANALYSIS
GEOS-3 satellite
Spherical harmonics
Point Mass method
WUAFGL2309G106
PE61102F
North Atlantic
Online Access:http://www.dtic.mil/docs/citations/ADA074524
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA074524
Description
Summary:The point mass technique, which supplements a spherical harmonic expansion of the potential, allows short wavelength detail to be added to previously computed long wavelength geoidal features without distorting the latter. Recently, the AFGL short-arc approach to satellite altimetry has been modified to allow point mass adjustments. GEOS-3 altimeter residuals in the North Atlantic region were obtained from a first adjustment in terms of spherical harmonics and state vector parameters. A subsequent point mass adjustment was performed on these residuals to obtain the short wavelength geoid and gravity anomalies. Advantages of the point mass model stem from a flexible deployment of the new parameters (point mass magnitudes) in an area of interest that permits important computer savings when processing large amounts of satellite data in a local region. (Author)

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