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From discrete gravity survey data to a high-resolution gravity field representation in the Nordic-Baltic region
Tallinn University of Technology, Estonia.
Lantmäteriet.
Technical University of Denmark.
Estonian Land Board.
Vise andre og tillknytning
2017 (engelsk)Inngår i: Marine Geodesy, ISSN 0149-0419, E-ISSN 1521-060X, Vol. 40, nr 6, s. 416-453Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The deduction of a regularly spaced gravity anomaly grid from scattered survey data is studied, addressing mainly two aspects: reduction of gravity to anomalies and subsequent interpolation by various methods. The problem is illustrated in a heterogeneous study area and contrasting test areas including mountains, low terrains, and a marine area. Provided with realistic error estimates, Least Squares Collocation interpolation of Residual Terrain Model anomalies yields the highest quality gravity grid. In most cases, the Bouguer reduction and other interpolation methods tested are equally viable. However, spline-based interpolation should be avoided in marine areas with trackwise survey data.

sted, utgiver, år, opplag, sider
2017. Vol. 40, nr 6, s. 416-453
Emneord [en]
Bouguer anomaly, gravity database, gridding, interpolation, Nordic Geodetic Commission (NKG), regional geoid, residual gravity anomaly, Residual Terrain Model (RTM) anomaly
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Identifikatorer
URN: urn:nbn:se:hig:diva-31126DOI: 10.1080/01490419.2017.1326428OAI: oai:DiVA.org:hig-31126DiVA, id: diva2:1373616
Tilgjengelig fra: 2019-11-27 Laget: 2019-11-27 Sist oppdatert: 2019-11-27bibliografisk kontrollert

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