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Gravity field determination and error assessment techniquesLinear estimation theory, along with a new technique to compute relative data weights, was applied to the determination of the Earth's geopotential field and other geophysical model parameters using a combination of satellite ground-based tracking data, satellite altimetry data, and the surface gravimetry data. The relative data weights for the inhomogeneous data sets are estimated simultaneously with the gravity field and other geophysical and orbit parameters in a least squares approach to produce the University of Texas gravity field models. New techniques to perform calibration of the formal covariance matrix for the geopotential solution were developed to obtain a reliable gravity field error estimate. Different techniques, which include orbit residual analysis, surface gravity anomaly residual analysis, subset gravity solution comparisons and consider covariance analysis, were applied to investigate the reliability of the calibration.
Document ID
19900011201
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Yuan, D. N. (Texas Univ. Austin, TX, United States)
Shum, C. K. (Texas Univ. Austin, TX, United States)
Tapley, B. D. (Texas Univ. Austin, TX, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1989
Publication Information
Publication: Ohio State Univ., Progress in the Determination of the Earth's Gravity Field
Subject Category
Geophysics
Accession Number
90N20517
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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