Combined modeling of the Earth's gravity field from GRACE and GOCE satellite observations: A numerical study

R. Ditmar; X. Liu; R. Klees; Robert Tenzer; R. Moore

doi:10.1007/978-3-540-49350-1_59

Combined modeling of the Earth's gravity field from GRACE and GOCE satellite observations: A numerical study

R. Ditmar, X. Liu, R. Klees, Robert Tenzer, R. Moore

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

1 Citation (Scopus)

Abstract

A numerical study has been conducted in order to estimate how a gravity field model obtained from GOCE data can be improved in the range of low degrees by addition of GRACE data. The GRACE data are simulated as inter-satellite accelerations. Different types of noise in the inter-satellite accelerations are considered, including white noise. The gravity field model is represented as a series of spherical harmonics; the Stokes coefficients are computed by a least-squares adjustment. It is shown that the incorporation of GRACE data may improve a GOCE-based gravity field model up to degree 120 or even higher depending on the type of noise in the inter-satellite accelerations. Moreover, the joint model at lower degrees may show a significantly higher quality that either a stand-alone GOCE-based or a stand-alone GRACE-based model. It is important, however, that proper covariance matrices of the involved data sets are used in the joint data processing.

Original language	English
Title of host publication	Dynamic Planet
Subtitle of host publication	Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools - lAG Symposium
Pages	403-409
Number of pages	7
Volume	130
DOIs	https://doi.org/10.1007/978-3-540-49350-1_59
Publication status	Published - 1 Dec 2007
Externally published	Yes
Event	IAG Symposium on Dynamic Planet: Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools - Cairns, QLD, Australia Duration: 22 Aug 2005 → 26 Aug 2005

Conference

Conference	IAG Symposium on Dynamic Planet: Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools
Country/Territory	Australia
City	Cairns, QLD
Period	22/08/05 → 26/08/05

Keywords

Earth's gravity field
GOCE
GRACE
Gravity gradiometry
Inter-satellite accelerations

ASJC Scopus subject areas

Computers in Earth Sciences
Geophysics

More information

10.1007/978-3-540-49350-1_59

Cite this

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title = "Combined modeling of the Earth's gravity field from GRACE and GOCE satellite observations: A numerical study",

abstract = "A numerical study has been conducted in order to estimate how a gravity field model obtained from GOCE data can be improved in the range of low degrees by addition of GRACE data. The GRACE data are simulated as inter-satellite accelerations. Different types of noise in the inter-satellite accelerations are considered, including white noise. The gravity field model is represented as a series of spherical harmonics; the Stokes coefficients are computed by a least-squares adjustment. It is shown that the incorporation of GRACE data may improve a GOCE-based gravity field model up to degree 120 or even higher depending on the type of noise in the inter-satellite accelerations. Moreover, the joint model at lower degrees may show a significantly higher quality that either a stand-alone GOCE-based or a stand-alone GRACE-based model. It is important, however, that proper covariance matrices of the involved data sets are used in the joint data processing.",

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Ditmar, R, Liu, X, Klees, R, Tenzer, R & Moore, R 2007, Combined modeling of the Earth's gravity field from GRACE and GOCE satellite observations: A numerical study. in Dynamic Planet: Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools - lAG Symposium. vol. 130, pp. 403-409, IAG Symposium on Dynamic Planet: Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools, Cairns, QLD, Australia, 22/08/05. https://doi.org/10.1007/978-3-540-49350-1_59

Combined modeling of the Earth's gravity field from GRACE and GOCE satellite observations: A numerical study. / Ditmar, R.; Liu, X.; Klees, R. et al.
Dynamic Planet: Monitoring and Understanding a Dynamic Planet with Geodetic and Oceanographic Tools - lAG Symposium. Vol. 130 2007. p. 403-409.

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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AU - Tenzer, Robert

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AB - A numerical study has been conducted in order to estimate how a gravity field model obtained from GOCE data can be improved in the range of low degrees by addition of GRACE data. The GRACE data are simulated as inter-satellite accelerations. Different types of noise in the inter-satellite accelerations are considered, including white noise. The gravity field model is represented as a series of spherical harmonics; the Stokes coefficients are computed by a least-squares adjustment. It is shown that the incorporation of GRACE data may improve a GOCE-based gravity field model up to degree 120 or even higher depending on the type of noise in the inter-satellite accelerations. Moreover, the joint model at lower degrees may show a significantly higher quality that either a stand-alone GOCE-based or a stand-alone GRACE-based model. It is important, however, that proper covariance matrices of the involved data sets are used in the joint data processing.

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Combined modeling of the Earth's gravity field from GRACE and GOCE satellite observations: A numerical study

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Keywords

ASJC Scopus subject areas

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