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Topographic and atmospheric effects on goce gradiometric data in a local north-oriented frame: A case study in Fennoscandia and Iran
KTH, School of Architecture and the Built Environment (ABE), Transport and Economics (closed 20110301), Geodesy (closed 20110301).
KTH, School of Architecture and the Built Environment (ABE), Transport and Economics (closed 20110301), Geodesy (closed 20110301).
2009 (English)In: Studia Geophysica et Geodaetica, ISSN 0039-3169, E-ISSN 1573-1626, Vol. 53, no 1, 61-80 p.Article in journal (Refereed) Published
Abstract [en]

Satellite gradiometry is an observation technique providing data that allow for evaluation of Stokes' (geopotential) coefficients. This technique is capable of determining higher degrees/orders of the geopotential coefficients than can be achieved by traditional dynamic satellite geodesy. The satellite gradiometry data include topographic and atmospheric effects. By removing those effects, the satellite data becomes smoother and harmonic outside sea level and therefore more suitable for downward continuation to the Earth's surface. For example, in this way one may determine a set of spherical harmonics of the gravity field that is harmonic in the exterior to sea level. This article deals with the above effects on the satellite gravity gradients in the local north-oriented frame. The conventional expressions of the gradients in this frame have a rather complicated form, depending on the first-and second-order derivatives of the associated Legendre functions, which contain singular factors when approaching the poles. On the contrary, we express the harmonic series of atmospheric and topographic effects as non-singular expressions. The theory is applied to the regions of Fennoscandia and Iran, where maps of such effects and their statistics are presented and discussed.

Place, publisher, year, edition, pages
2009. Vol. 53, no 1, 61-80 p.
Keyword [en]
atmosphere, local north-oriented frame, satellite gradiometry, topography, topographic effect, GOCE
National Category
Geophysics Earth and Related Environmental Sciences
URN: urn:nbn:se:kth:diva-32217DOI: 10.1007/s11200-009-0004-zISI: 000263980000004ScopusID: 2-s2.0-62549146675OAI: diva2:409819
QC 20110411Available from: 2011-04-11 Created: 2011-04-11 Last updated: 2011-04-11Bibliographically approved

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Eshagh, MehdiSjöberg, Lars E.
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