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Gravity Compensation Using EGM2008 for High-Precision Long-Term Inertial Navigation Systems. [PDF]
Sensors (Basel), 2016 Wu R, Wu Q, Han F, Liu T, Hu P, Li H.
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Gene expression profile regulated by the HPV16 E7 oncoprotein and estradiol in cervical tissue. [PDF]
Virology, 2013 Cortés-Malagón EM +15 more
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Geoid undulation differences between geopotential models
Surveys in Geophysics, 1993Three geopotential models (OSU91A, GEM-T3, and GRIM4-C2), available in 1991, have been compared in several ways. The models have been differenced to find the geoid undulation difference are on the order of 1 m in land areas and 30 cm in ocean areas with extreme differences reaching 6 m.
Richard H. Rapp, Yan Ming Wang
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Minimization and estimation of geoid undulation errors
Bulletin Géodésique, 1994The objective of this paper is to minimize the geoid undulation errors by focusing on the contribution of the global geopotential model and regional gravity anomalies, and to estimate the accuracy of the predicted gravimetric geoid. The geopotential model's contribution is improved by (a) tailoring it using the regional gravity anomalies and (b ...
Ye Cai Li, Michael G. Sideris
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Prediction of geoid undulations: Random forest versus classic interpolation techniques
Concurrency and Computation: Practice and Experience, 2022AbstractLocal geoid determination studies are commonly carried out today to establish the relationship between the ellipsoidal height determined by satellite geodesy methods and the orthometric height found using geoid undulation . The aim of this study was to determine a local geoid using the kriging, local polynomial (LP), and inverse distance to a
Alper Akar +2 more
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IEEE Transactions on Geoscience and Remote Sensing, 1993
For use in oceanographic applications the geoid is ideally needed to a high accuracy and to a high resolution. In 1979 the cumulative geoid undulation error to spherical harmonic degree 20 was +or-1.4 m for the GEM10 potential coefficient model. Today the corresponding value has been reduced to +or-25 cm for GEM-T3 or +or-11 cm for the OSU91A model ...
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For use in oceanographic applications the geoid is ideally needed to a high accuracy and to a high resolution. In 1979 the cumulative geoid undulation error to spherical harmonic degree 20 was +or-1.4 m for the GEM10 potential coefficient model. Today the corresponding value has been reduced to +or-25 cm for GEM-T3 or +or-11 cm for the OSU91A model ...
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Determination of Geoid Undulation by Astro-Geodetic Method
Journal of Surveying Engineering, 2016AbstractCivil engineering projects require the orthometric height of points (i.e., the height of points above geoid). Thus, to make use of the Global Navigation Satellite System (GNSS) in engineering surveying, geoid undulation (i.e., the separation between an ellipsoid and geoid surface) must be known.
Jayanta Kumar Ghosh, Upendra Nath Mishra
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Accuracy of geoid undulation computations
Journal of Geophysical Research, 1973Geoid undulations have been recently computed using a set of spherical harmonic potential coefficients and 1° × 1° mean free-air anomalies. The latter quantities are used in Stokes's equation out to some spherical radius ψ0 from the computation points.
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Modelling geoid undulations with an artificial neural network
IJCNN'99. International Joint Conference on Neural Networks. Proceedings (Cat. No.99CH36339), 2003Examines the use of a backpropagation neural network to model geoid undulations. Modelling of the Earth's gravity field, and in particular the separation between ellipsoid and geoid surface, is one of the fundamental problems in the field of geodesy.
J. Seager, P. Collier, J. Kirby
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Undulations in the Altimeter Derived Geoid: Geophysical Studies
1981Satellite altimeter data have been revealed to be of very useful interest for the shape of the sea surface, thus for oceanography. However to extract the oceanographic signal from altimeter data, the shape of the geoid (the equipotential surface representing the earth gravity field) has to be known.
A. Cazenave, M. Lefebvre
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