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The atmospheric geoid effects in Stokes' formula
KTH, Superseded Departments, Geodesy and Photogrammetry.
2000 (English)In: Geophysical Journal International, ISSN 0956-540X, E-ISSN 1365-246X, Vol. 140, no 1, 95-100 p.Article in journal (Refereed) Published
Abstract [en]

The application of Stokes' formula requires that the atmospheric effect on the gravity anomaly is removed. We show that this direct effect reaches about -40 cm over the Himalayas and Antarctica. The restoring of the atmospheric masses yields the indirect atmospheric effect, reaching about -20 cm for the same regions. Consequently, the total atmospheric effect on the geoid is of the order of - 60 cm. However, for most areas close to sea level, the correction is within a few centimetres. Furthermore, the total atmospheric geoid effect is derived for the truncated as well as the modified Stokes formula. It is emphasized that the traditional (IAG) approach to adding a direct atmospheric effect to gravity may lead to a serious geoid bias in the truncated Stokes formula. However, as all the parameters of the bias are known, it can easily be corrected. In contrast, we suggest that the total atmospheric effect on the geoid be determined separately. In this approach the bias is avoided.

Place, publisher, year, edition, pages
2000. Vol. 140, no 1, 95-100 p.
Keyword [en]
atmospheric effect, geoid, remove-restore, Stokes' formula
Identifiers
URN: urn:nbn:se:kth:diva-19552ISI: 000085367400011OAI: oai:DiVA.org:kth-19552DiVA: diva2:338244
Note
QC 20100525Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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