Change search
ReferencesLink to record
Permanent link

Direct link
Quality Estimates in Geoid Computation by EGM08
KTH, School of Architecture and the Built Environment (ABE), Urban Planning and Environment, Geodesy and Geoinformatics.
2011 (English)In: Journal of Geodetic Science, ISSN 2081-9919, E-ISSN 2081-9943, Vol. 1, no 4, 361-366 p.Article in journal (Refereed) Published
Abstract [en]

The high-degree Earth Gravitational Model EGM08 allows for geoid determination with a resolution of the order of 5'. Using this model for estimating the quasigeoid height, we estimate the global root mean square (rms) commission error to 5 and 11 cm, based on the assumptions that terrestrial gravity contributes to the model with an rms standard error of 5 mGal and correlation length 0:01° and 0:1°, respectively. The omission error is estimated to—0:7Δg [mm], where Δg is the regional mean gravity anomaly in units of mGal.

In case of geoid determination by EGM08, the topographic bias must also be considered. This is because the Earth's gravitational potential, in contrast to its spherical harmonic representation by EGM08, is not a harmonic function at the geoid inside the topography. If a correction is applied for the bias, the main uncertainty that remains is that from the uncertainty in the topographic density, which will still contribute to the overall geoid error.

Place, publisher, year, edition, pages
2011. Vol. 1, no 4, 361-366 p.
Keyword [en]
EGM08, Geoid, commission error, omission error
National Category
Other Engineering and Technologies not elsewhere specified
URN: urn:nbn:se:kth:diva-166673DOI: 10.2478/v10156-011-0014-yOAI: diva2:811789

QC 20150513

Available from: 2015-05-13 Created: 2015-05-13 Last updated: 2015-05-13Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full text

Search in DiVA

By author/editor
Sjöberg, Lars E.
By organisation
Geodesy and Geoinformatics
In the same journal
Journal of Geodetic Science
Other Engineering and Technologies not elsewhere specified

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 9 hits
ReferencesLink to record
Permanent link

Direct link