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Determination of a gravimetric geoid model of Kazakhstan using the KTH-method
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geoinformatik och Geodesi.
2010 (English)Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
Abstract [en]

This study work deals with the determination of the gravimetric geoid model for Kazakhstan by using the KTH-method.

A number of data sets were collected for this work, such as the gravity anomalies, high-resolution Digital Elevation Model (DEM), Global Geopotential Models (GGMs) and GPS/Levelling data. These data has been optimally combined through the KTH approach, developed at the Royal Institute of Technology (KTH) in Stockholm. According to this stochastic method, Stokes’ formula is being used with the original surface gravity anomaly, which combine with a GGM yields approximate geoid heights. The corrected geoid heights are then obtained by adding the topographic, downward continuation, atmospheric and ellipsoidal corrections to the approximate geoid heights.

To compute the geoid model for Kazakhstan as accurately as possible with available data set different numerical tests have been performed:

  • Choice of the best fit geopotential model in the computation area
  • Investigations for the best choice of the initial condition for determination of the least-squares parameters
  • Selection of the best parametric model for reducing the effect of the systematic error and data inconsistencies between computed geoid heights and GPS/Levelling heights.

 Finally, 5'x5' Kazakh gravimetric geoid (KazGM2010) has been modelled. 

Place, publisher, year, edition, pages
, TRITA-GEOD, ISSN 1653-5227 ; EX 10-003
Keyword [en]
geoid model, least-squares modification of Stokes’ formula, the KTH-method, GPS/Levelling, Kazakhstan
National Category
Other Engineering and Technologies
URN: urn:nbn:se:kth:diva-52284ISRN: KTH/GIT/EX--10/003-SEOAI: diva2:465930
Subject / course
Educational program
Degree of Master - Geodesy and Geoinformatics
2010-06-18, Teknikringen 72, Stockholm, 09:00 (English)
Available from: 2011-12-15 Created: 2011-12-15 Last updated: 2011-12-15Bibliographically approved

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