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A new technique to determine geoid and orthometric heights from satellite positioning and geopotential numbers
KTH, School of Architecture and the Built Environment (ABE), Transport and Economics, Geodesy.
2006 (English)In: Journal of Geodesy, ISSN 0949-7714, E-ISSN 1432-1394, Vol. 80, no 6, 304-312 p.Article in journal (Refereed) Published
Abstract [en]

This paper takes advantage of space-technique-derived positions on the Earth’s surface and the known normal gravity field to determine the height anomaly from geopotential numbers. A new method is also presented to downward-continue the height anomaly to the geoid height. The orthometric height is determined as the difference between the geodetic (ellipsoidal) height derived by space-geodetic techniques and the geoid height. It is shown that, due to the very high correlation between the geodetic height and the computed geoid height, the error of the orthometric height determined by this method is usually much smaller than that provided by standard GPS/levelling. Also included is a practical formula to correct the Helmert orthometric height by adding two correction terms: a topographic roughness term and a correction term for lateral topographic mass–density variations.

Place, publisher, year, edition, pages
2006. Vol. 80, no 6, 304-312 p.
Keyword [en]
Downward continuation; Geoid; Geopotential number; GPS-levelling; Normal height; Orthometric height
National Category
Earth and Related Environmental Sciences
URN: urn:nbn:se:kth:diva-10827DOI: 10.1007/s00190-006-0057-5ISI: 000240317400002ScopusID: 2-s2.0-33748309360OAI: diva2:228096
QC 20100824Available from: 2009-07-24 Created: 2009-07-24 Last updated: 2010-08-24Bibliographically approved

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