Details

Title

Accuracy assessment of GOCE-based geopotential models and their use for modelling the gravimetric quasigeoid - A case study for Poland

Journal title

Geodesy and Cartography

Yearbook

2014

Volume

vol. 63

Numer

No 1

Publication authors

Keywords

global geopotential model ; GNSS/levelling ; GOCE ; least squares collocation ; quasigeoid ; height anomaly

Divisions of PAS

Nauki Techniczne

Abstract

The GOCE (Gravity Field and Steady-State Ocean Circulation Explorer) has significantly upgraded the knowledge on the Earth gravity field. In this contribution the accuracy of height anomalies determined from Global Geopotential Models (GGMs) based on approximately 27 months GOCE satellite gravity gradiometry (SGG) data have been assessed over Poland using three sets of precise GNSS/levelling data. The fits of height anomalies obtained from 4th release GOCE-based GGMs to GNSS/levelling data were discussed and compared with the respective ones of 3rd release GOCE-based GGMs and the EGM08. Furthermore, two highly accurate gravimetric quasigeoid models were developed over the area of Poland using high resolution Faye gravity anomalies. In the first, the GOCE-based GGM was used as a reference geopotential model, and in the second – the EGM08. They were evaluated with GNSS/levelling data and their accuracy performance was assessed. The use of GOCE-based GGMs for recovering the long-wavelength gravity signal in gravimetric quasigeoid modelling was discussed.

Publisher

Commitee on Geodesy PAS

Date

2014

Type

Artykuły / Articles

Identifier

ISSN 2080-7636

DOI

10.2478/geocart-2014-0001

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