Open Access
Validation of Global Gravitational Field Models in Norway
B. R. Pettersen,Michal Šprlák,Christian Gerlach +2 more
- Vol. 728, pp 28
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TLDR
In this article, the spectral enhancement method is applied to overcome the spectral inconsistency between the GOCE satellite gravitational models and the terrestrial data, and three terrestrial datasets indicate comparable performance with respect to EGM2008 up to degree and order 220 in the studied local area.Abstract:
Numerous global gravitational field models have been derived from the GOCE satellite gravitational gradiometry mission. They differ by the harmonic analysis approach and the time span covered by the measurements. The quality of individual solutions is assessed by validating the global gravitational field models with respect to independent datasets. Global gravitational field models based on the time-wise and the direct approach are validated in this contribution. All five releases are compared to height anomalies, free-air gravity anomalies, and deflections of the vertical over the continental part of Norway. The spectral enhancement method is applied to overcome the spectral inconsistency between the gravitational models and the terrestrial data. The three terrestrial datasets indicate comparable performance of the latest GOCE models with respect to EGM2008 up to degree and order 220 in the studied local area.read more
Citations
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Journal ArticleDOI
Absolute gravity observations in Norway (1993-2014) for glacial isostatic adjustment studies: The influence of gravitational loading effects on secular gravity trends
Vegard Ophaug,Kristian Breili,Kristian Breili,Christian Gerlach,Christian Gerlach,Jon Glenn Omholt Gjevestad,D. I. Lysaker,O. C. D. Omang,Bjørn Ragnvald Pettersen +8 more
TL;DR: In this article, the FG5 absolute gravity observations between 1993 and 2014 at 21 gravity sites in Norway, and explore to what extent these observations are applicable for glacial isostatic adjustment (GIA) studies.
Journal ArticleDOI
Consistency of Geoid Models, Radar Altimetry, and Hydrodynamic Modelling in the North Sea
TL;DR: In this paper, the authors investigate whether and how such an "altimetric-hydrodynamic" geoid over the North Sea can serve for validating satellite-gravimetric geoids.
Journal ArticleDOI
A historical review of gravimetric observations in Norway
TL;DR: The first gravity determinations in Norway were made by Edward Sabine in 1823 with a pendulum instrument by Henry Kater Seventy years later a Sterneck pendulum was acquired by the Norwegian Commission for the International Arc Measurements It improved the precision and eventually reduced the bias of the absolute calibration from 85 to 15mGal as discussed by the authors.
Dissertation
Geodetic observations and modeling of gravity field, sea level, and ocean dynamics in the Norwegian coastal zone
TL;DR: In this article, the authors compared six ocean MDT profiles with geodetic profiles based on tide gauges, dedicated coastal altimetry products, and conventional al-imetry.
Journal ArticleDOI
Assessment of chosen GRACE-related gravity models based on the GOCE satellite precise science orbit
TL;DR: In this article, eight selected geopotential models obtained through the International Center for Global Earth Models were used in the dynamic orbit determination process of the satellite of the Gravity Field and Steady State Ocean Circulation Explorer (GOCE) mission.
References
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Journal ArticleDOI
The development and evaluation of the Earth Gravitational Model 2008 (EGM2008)
TL;DR: EGM2008 as mentioned in this paper is a spherical harmonic model of the Earth's gravitational potential, developed by a least squares combination of the ITG-GRACE03S gravitational model and its associated error covariance matrix, with the gravitational information obtained from a global set of area-mean free-air gravity anomalies defined on a 5 arc-minute equiangular grid.
Journal ArticleDOI
First GOCE gravity field models derived by three different approaches
Roland Pail,Sean Bruinsma,Federica Migliaccio,Christoph Förste,Helmut Goiginger,Wolf-Dieter Schuh,Eduard Höck,Mirko Reguzzoni,Jan Martin Brockmann,O. Abrikosov,M. Veicherts,Thomas Fecher,Reinhard Mayrhofer,Ina Krasbutter,Fernando Sansò,Carl Christian Tscherning +15 more
TL;DR: In this article, three gravity field models, parameterized in terms of spherical harmonic coefficients, have been computed from 71 days of GOCE (Gravity field and steady-state Ocean Circulation Explorer) orbit and gradiometer data by applying independent gravity field processing methods.
Journal ArticleDOI
A unified approach to the Clenshaw summation and the recursive computation of very high degree and order normalised associated Legendre functions
S. A. Holmes,Will Featherstone +1 more
TL;DR: In this article, Horner's method is used to compute a scaled version of the Legendre function, complete to degree and order 2700 for all latitudes (except at the poles for first derivatives).
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