A GEOID TO QUASIGEOID SEPARATION CONSIDERING
SECOND ORDER HEIGHT TERMS
Xi’an Division of Surveying and Mapping, Xi’an 710054
Abstract The separation between geoid and quasigeoid by using observed gravity data and SRTM3 terrain data in some areas of QinghaiTibet plateau was determined. Theory analyses and numerical tests showed that there existed a high correlation between the separation and elevation, and the average correction about first order height terms could be up to 1.76 m, and the maximum correction about second order height terms could be up to 0.03 m.
Key words :
geoid
quasigeoid
free air gravity anomalies
Bouguer gravity anomalies
SRTM3
C2 term
Received: 06 March 2013
Published: 13 October 2013
Cite this article:
Xu Xinqiang,Zhao Dejun,Lou Nan. A GEOID TO QUASIGEOID SEPARATION CONSIDERING
SECOND ORDER HEIGHT TERMS[J]. jgg, 2013, 33(5): 75-78.
Xu Xinqiang,Zhao Dejun,Lou Nan. A GEOID TO QUASIGEOID SEPARATION CONSIDERING
SECOND ORDER HEIGHT TERMS[J]. jgg, 2013, 33(5): 75-78.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2013/V33/I5/75
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