On integral approach to regional gravity field modelling from satellite gradiometric data
2011 (English)In: ACTA GEOPHYS, ISSN 1895-6572, Vol. 59, no 1, 29-54 p.Article in journal (Refereed) Published
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.
downward continuation, Gaunt's coefficients, geoid, inversion, satellite gradiometry, Wiener filter
Social and Economic Geography
IdentifiersURN: urn:nbn:se:kth:diva-27700DOI: 10.2478/s11600-010-0033-6ISI: 000284592200003ScopusID: 2-s2.0-78649705901OAI: oai:DiVA.org:kth-27700DiVA: diva2:379812
QC 201012202010-12-202010-12-202010-12-20Bibliographically approved