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GPS - derived Geoid Using Artificial Neural Network and Least Squares Collocation
Stopar, Bojan (Author), Ambrožič, Tomaž (Author), Kuhar, Miran (Author), Turk, Goran (Author)

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Abstract
The geoidal undulations are needed for determining the orthometric heights from the Global Positioning System GPS-derived ellipsoidal heights. There ore several methods for geoidal undulation determination. The paper presents a method employing the Artificial Neural Network (ANN) approximation together with the Least Squares Collocation (LSC). The surface obtained by the ANN approximation is used as a trend surface in the least squares collocation. In numerical examples four surfaces were compared: the global geopotential model (EGM96), the European gravimetric quasigeoid 1997 (EGG97), the surface approximated with minimum curvature splines in tension algorithm and the ANN surface approximation. The effectiveness of the ANN surface approximation depends on the number of control points. If the number of well-distributed control points is sufficiently large, the results are better than those obtained by the minimum curvature algorithm and comparable to those obtained by the EGG97 model.

Language:English
Keywords:geoid, ANN, collocation
Tipology:1.01 - Original Scientific Article
Organization:FGG - Faculty of Civil and Geodetic Engineering
Year:2006
Publisher:Maney Publishing
Number of pages:Str. 513-524
Numbering:Vol. 38, No. 300
UDC:528
ISSN on article:0039-6265
COBISS.SI-ID:3080289 This link opens in a new window
Views:1635
Downloads:704
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Record is a part of a journal

Title:Survey review
Shortened title:Surv. rev. - Dir. Overseas Surv.
Publisher:Directorate of Overseas Surveys of the Ministry of Overseas Development
ISSN:0039-6265
COBISS.SI-ID:26484224 This link opens in a new window

Secondary language

Language:English
Keywords:geoid, ANN, kolokacija

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