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On integral approach to regional gravity field modelling from satellite gradiometric data
KTH, School of Architecture and the Built Environment (ABE), Transport and Economics, Geodesy.
2011 (English)In: ACTA GEOPHYS, ISSN 1895-6572, Vol. 59, no 1, 29-54 p.Article in journal (Refereed) Published
Abstract [en]

Solution of the gradiometric boundary value problems leads to three integral formulas. If we are satisfied with obtaining a smooth solution for the Earth's gravity field, we can use the formulas in regional gravity field modelling. In such a case, satellite gradiometric data are integrated on a sphere at satellite level and continued downward to the disturbing potential (geoid) at sea level simultaneously. This paper investigates the gravity field modelling from a full tensor of gravity at satellite level. It studies the truncation bias of the integrals as well as the filtering of noise of data. Numerical studies show that by integrating T (zz) with 1 mE noise and in a cap size of 7A degrees, the geoid can be recovered with an error of 12 cm after the filtering process. Similarly, the errors of the recovered geoids from T (xz,yz) and T (xx-yy, 2xy) are 13 and 21 cm, respectively.

Place, publisher, year, edition, pages
2011. Vol. 59, no 1, 29-54 p.
Keyword [en]
downward continuation, Gaunt's coefficients, geoid, inversion, satellite gradiometry, Wiener filter
National Category
Social and Economic Geography
Identifiers
URN: urn:nbn:se:kth:diva-27700DOI: 10.2478/s11600-010-0033-6ISI: 000284592200003Scopus ID: 2-s2.0-78649705901OAI: oai:DiVA.org:kth-27700DiVA: diva2:379812
Note
QC 20101220Available from: 2010-12-20 Created: 2010-12-20 Last updated: 2010-12-20Bibliographically approved

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  • apa
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  • nn-NB
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  • Other locale
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Output format
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