Results 81 to 90 of about 1,527 (198)

Power spectra of geoid undulations [PDF]

open access: yes
Data from spacecraft altimeters are expected to contribute to an improved determination of the marine geoid. To better define altimeter system design requirements for geoid recovery, amplitudes of geoid undulations at short wavelengths were examined ...
Brown, R. D.
core   +1 more source

Improving Geoidal Height Estimates from Global Geopotential Model Using Regression Model and GPS Data [PDF]

open access: yes, 1997
Conventionally, for most application, position of a point is often referred to the geoid as the reference surface. Thus there is an important need for the knowledge of the geoid undulation in the area where positioning tasks is performed, This ...
Abdullah, Khairul Anuar
core  

A G-Modified Helmholtz Equation with New Expansions for the Earth’s Disturbing Gravitational Potential, Its Functionals and the Study of Isogravitational Surfaces

open access: yesAppliedMath
The G-modified Helmholtz equation is a partial differential equation that enables us to express gravity intensity g as a series of spherical harmonics having radial distance r in irrational powers.
Gerassimos Manoussakis
doaj   +1 more source

User's guide: Programs for processing altimeter data over inland seas [PDF]

open access: yes
The programs described were developed to process GEODYN-formatted satellite altimeter data, and to apply the processed results to predict geoid undulations and gravity anomalies of inland sea areas.
Au, A. Y., Brown, R. D., Welker, J. E.
core   +1 more source

Estimation of the ocean geoid near the Blake Escarpment using GEOS-3 satellite altimetry [PDF]

open access: yes
The accuracy with which the local ocean geoid structure could be determined using satellite altimetry data was investigated. The undulation and along-track component of the vertical deflection for selected passes of GEOS-3 near the Blake Escarpment were ...
Brammer, R. F.
core   +1 more source

Methods for the computation of detailed geoids and their accuracy [PDF]

open access: yes
Two methods for the computation of geoid undulations using potential coefficients and 1 deg x 1 deg terrestrial anomaly data are examined. It was found that both methods give the same final result but that one method allows a more simplified error ...
Rapp, R. H., Rummel, R.
core   +1 more source

Enhancement of height system for Malaysia using space technology: the study of the datum bias inconsistencies in Peninsular Malaysia [PDF]

open access: yes, 2003
The algorithm for orthometric height transfer using GPS has been widely presented. Its practical limitations are mostly due to datum bias inconsistencies and lack of precise geoid.
Mohamed, Azhari   +2 more
core  

Science opportunities from the Topex/Poseidon mission [PDF]

open access: yes
The U.S. National Aeronautics and Space Administration (NASA) and the French Centre National d'Etudes Spatiales (CNES) propose to conduct a Topex/Poseidon Mission for studying the global ocean circulation from space.
Fu, L. L., Lefebvre, M., Stewart, R.
core   +1 more source

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