000193222 001__ 193222
000193222 003__ CZ-ZdVUG
000193222 005__ 20190208113517.0
000193222 044__ $$axxk
000193222 041__ $$aeng
000193222 040__ $$aABC039$$bcze
000193222 1001_ $$aSebera, Josef
000193222 24510 $$aAn oblate ellipsoidal approach to update a high-resolution geopotential model over the oceans: Study case of EGM2008 and DTU10
000193222 300__ $$a17 stran
000193222 500__ $$aRIV: 	RIV/00025615:_____/16:N0000021
000193222 5203_ $$9eng$$aThe most important high-resolution geopotential models such as EGM96 and EGM2008 have been released approximately once per decade. In light of the ability of modem satellite, airborne or terrestrial techniques to provide new data sets every year (e.g., in polar and ocean areas), these data can be readily included in existing models without waiting for a new release. In this article, we present a novel ellipsoidal approach for updating high-resolution models over the oceans with new gridded data. The problem is demonstrated using the EGM2008 model updated with DTU10 geoid and gravity grids that provide additional signal over the Arctic oceans. The result of the procedure are the ellipsoidal and the spherical harmonic coefficients up to degree 4320 and 4400, respectively. These coefficients represent the input data set to within 0.08 mGal globally, with the largest differences located at the land ocean boundaries, which is two orders of magnitude less than real accuracy of gravity data from satellite altimetry. Along with the harmonic coefficients a detailed map of the second vertical derivative of the anomalous potential (or vertical gravitational gradient) on 1 arc-min grid is anticipated to improve or complement the original DTU10 geoid model. Finally, an optimized set of Jekeli's functions is provided as they allow for computing oblate ellipsoidal harmonics up to a very high degree and order (>10,000) in terms of the hypergeometric formulation. (C) 2015 COSPAR. Published by Elsevier Ltd. All rights reserved.
000193222 655_4 $$aanotace
000193222 653_0 $$aDTU10$$aEGM2008$$aHarmonic analysis$$aOblate ellipsoidal harmonics$$aEarth's gravitational field
000193222 7001_ $$aBezděk, Aleš
000193222 7001_ $$aKostelecký, Jan
000193222 7001_ $$aPešek, Ivan
000193222 7001_ $$aShum, C.K.
000193222 7730_ $$92016$$g57(1), p. 2-18$$tADVANCES IN SPACE RESEARCH$$x0273-1177
000193222 856__ $$uurn:doi:10.1016/j.asr.2015.08.024
000193222 85642 $$uhttps://www.rvvi.cz/riv?s=rozsirene-vyhledavani&ss=detail&n=0&h=RIV%2F00025615%3A_____%2F16%3AN0000021%21RIV17-MSM-00025615
000193222 910__ $$aABC039
000193222 980__ $$aclanky_vugtk
000193222 985__ $$aanotace
000193222 985__ $$ariv
000193222 985__ $$akosteleckyjan
000193222 985__ $$autvar24