About: Iterative Spherical Downward Continuation Applied to Magnetic and Gravitational Data from Satellite

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About: Iterative Spherical Downward Continuation Applied to Magnetic and Gravitational Data from Satellite Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	In the last few decades, satellites have acquired various potential data sets hundreds of kilometers above the Earth's surface. Conventionally, these global magnetic and gravitational data sets are approximated by using spherical harmonics that allow straightforward work with both fields outside the Earth's mass. In this article, we present an alternative approach for working with potential data in mass-free space given over a regular coordinate grid on a spherical surface. The algorithm is based on an iterative scheme and the Poisson integral equation for the sphere. With help from the Fourier transform, global potential (magnetic or gravitational) data can efficiently be continued from a mean orbital sphere down to a reference surface without using the spherical harmonics. This is illustrated both with simulated magnetic field data and with real data from the satellite gradiometry mission GOCE. In the case of simulated magnetic data and the downward continuation for 450 km, we have achieved a root mean square at the level of 0.05 nT, while it was < 1 E (eotvos) for real GOCE data continued for 250 km. In the last few decades, satellites have acquired various potential data sets hundreds of kilometers above the Earth's surface. Conventionally, these global magnetic and gravitational data sets are approximated by using spherical harmonics that allow straightforward work with both fields outside the Earth's mass. In this article, we present an alternative approach for working with potential data in mass-free space given over a regular coordinate grid on a spherical surface. The algorithm is based on an iterative scheme and the Poisson integral equation for the sphere. With help from the Fourier transform, global potential (magnetic or gravitational) data can efficiently be continued from a mean orbital sphere down to a reference surface without using the spherical harmonics. This is illustrated both with simulated magnetic field data and with real data from the satellite gradiometry mission GOCE. In the case of simulated magnetic data and the downward continuation for 450 km, we have achieved a root mean square at the level of 0.05 nT, while it was < 1 E (eotvos) for real GOCE data continued for 250 km. (en)
Title	Iterative Spherical Downward Continuation Applied to Magnetic and Gravitational Data from Satellite Iterative Spherical Downward Continuation Applied to Magnetic and Gravitational Data from Satellite (en)
skos:prefLabel	Iterative Spherical Downward Continuation Applied to Magnetic and Gravitational Data from Satellite Iterative Spherical Downward Continuation Applied to Magnetic and Gravitational Data from Satellite (en)
skos:notation	RIV/67985815:_____/14:00438870!RIV15-AV0-67985815
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(ED1.1.00/02.0090), P(EE2.3.30.0013), P(LH13071)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Bezděk, Aleš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Astronomický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	23022
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/14:00438870
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	downward continuation; Earth's gravitational and magnetic field; poisson integral equation (en)
http://linked.open.../riv/klicoveSlovo	Earth's gravitational and magnetic field downward continuation poisson integral equation
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[B7D1B19D9CBD]
http://linked.open...i/riv/nazevZdroje	Surveys in Geophysics
http://linked.open...in/vavai/riv/obor	DE
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Excellence in human resources as a source of competitiveness Models of the gravitational field of the Earth: their computation and evaluation NTIS - New Technologies for Information Society
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	35
http://linked.open...iv/tvurceVysledku	Bezděk, Aleš Novák, P. Sebera, J. Valko, M. Šprlák, M.
http://linked.open...ain/vavai/riv/wos	000339047800003
issn	0169-3298
number of pages	18 (xsd:int)
http://bibframe.org/vocab/doi	10.1007/s10712-014-9285-z

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