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Gravimetric geoid model over Kazakhstan
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Satellite Positioning.
2015 (English)In: International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM, International Multidisciplinary Scientific Geoconference , 2015, no 2, 283-290 p.Conference paper (Refereed)Text
Abstract [en]

According to wide spread use of satellite based positioning techniques, especially GPS (Global Positioning System), a greater attention has started to be paid to precise determination of geoid models with an aim to replace the geometric levelling measurements with GPS measurements during geodetic and surveying works. The main purpose of this paper is to present a new gravimetric geoid model for Kazakhstan, which has been determined by applying the Least Squares Modification of Stokes’ formula with Additive corrections (LSMSA). Due to limited coverage of gravity data, the integration area is often limited to a small spherical cap around the computation point, which leads to a truncation error for geoid height. Molodensky et al. (1962) showed that the truncation error can be reduced by the modification of Stokes’ formula, where the measured gravity data are combined with the low-frequency component of the geoid from a Global Gravitational Model (GGM). The LSMSA technique combines the GGM and the terrestrial data in an optimum way. In this research a primary Kazakh gravimetric geoid model has been computed by combination of GOCE global geopotential model and terrestrial surface gravity anomaly data in grid.

Place, publisher, year, edition, pages
International Multidisciplinary Scientific Geoconference , 2015. no 2, 283-290 p.
Keyword [en]
Geoid, GOCE, Kazakhstan, Modification of Stokes formula, Geodetic satellites, Gravitation, Tracking (position), Global geopotential models, Gps (global positioning system), Low-frequency components, Precise determinations, Global positioning system
National Category
URN: urn:nbn:se:kth:diva-181523ISI: 000371600100035ScopusID: 2-s2.0-84946398857OAI: diva2:912868
15th International Multidisciplinary Scientific Geoconference and EXPO, SGEM 2015, 18 June 2015 through 24 June 2015

QC 20160318

Available from: 2016-03-18 Created: 2016-02-02 Last updated: 2016-06-29Bibliographically approved

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