Airborne geoid determination

René Forsberg, Arne Vestergaard Olesen, L. Bastos, A. Gidskehaug, U. Meyer, L. Timmen

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Airborne geoid mapping techniques may provide the opportunity to improve the geoid over vast areas of the Earth, such as polar areas, tropical jungles and mountainous areas, and provide an accurate "seam-less" geoid model across most coastal regions. Determination of the geoid by airborne methods relies on the development of airborne gravimetry, which in turn is dependent on developments in kinematic GPS. Routine accuracy of airborne gravimetry are now at the 2 mGal level, which may translate into 5-10 cm geoid accuracy on regional scales. The error behaviour of airborne gravimetry is well-suited for geoid determination, with high-frequency survey and downward continuation noise being offset by the low-pass gravity to geoid filtering operation. In the paper the basic principles of airborne geoid determination are outlined, and examples of results of recent airborne gravity and geoid surveys in the North Sea and Greenland are given.
Original languageEnglish
JournalEARTH PLANETS AND SPACE
Volume52
Issue number10
Pages (from-to)863-866
ISSN1343-8832
Publication statusPublished - 2000

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