Impact Of GOCE On The Nordic Gravity Field Modelling

Hasan Yidiz; René Forsberg; C. C. Tscherning; Gabriel Strykowski

Impact Of GOCE On The Nordic Gravity Field Modelling

Hasan Yidiz, René Forsberg, C. C. Tscherning, Gabriel Strykowski

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Abstract

GOCE level-2 Tzz and Txx gravity gradients at satellite altitude are used in combination as input data to predict surface free air gravity anomalies over the Nordic region using Least Square Collocation. We test the performance of using covariance functions created
separately from Tzz gradients and surface free air gravity anomalies to predict terrestrial gravity anomalies with a direct comparison of 19 mgal level and much better (7-8 mgal) when surface data are filtered at the GOCE resolution. We found that the results are slightly
dependent of covariance function. Combined with DTU10 Mean Sea Surface model, both the NKG-2004 quasi-geoid model of the Nordic and Baltic Area and the one obtained using second generation GOCE spherical harmonic coefficients based on time-wise method can successfully reproduce the higher level of the Baltic Sea relative to the Atlantic Ocean.

Original language	English
Title of host publication	Proceedings of 4th International GOCE User Workshop
Number of pages	6
Publisher	European Space Agency
Publication date	2011
ISBN (Print)	978-92-9092-260-5
Publication status	Published - 2011
Event	4th International GOCE User Workshop - Technische Universität München (TUM), Münich, Germany Duration: 31 Mar 2011 → 1 Apr 2011 Conference number: 4 http://www.goce2011.org/

Conference

Conference	4th International GOCE User Workshop
Number	4
Location	Technische Universität München (TUM)
Country/Territory	Germany
City	Münich
Period	31/03/2011 → 01/04/2011
Internet address	http://www.goce2011.org/

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@inproceedings{4c21ac1cba124bf48d5d0890c995a980,

title = "Impact Of GOCE On The Nordic Gravity Field Modelling",

abstract = "GOCE level-2 Tzz and Txx gravity gradients at satellite altitude are used in combination as input data to predict surface free air gravity anomalies over the Nordic region using Least Square Collocation. We test the performance of using covariance functions createdseparately from Tzz gradients and surface free air gravity anomalies to predict terrestrial gravity anomalies with a direct comparison of 19 mgal level and much better (7-8 mgal) when surface data are filtered at the GOCE resolution. We found that the results are slightlydependent of covariance function. Combined with DTU10 Mean Sea Surface model, both the NKG-2004 quasi-geoid model of the Nordic and Baltic Area and the one obtained using second generation GOCE spherical harmonic coefficients based on time-wise method can successfully reproduce the higher level of the Baltic Sea relative to the Atlantic Ocean.",

author = "Hasan Yidiz and Ren{\'e} Forsberg and Tscherning, {C. C.} and Gabriel Strykowski",

year = "2011",

language = "English",

isbn = "978-92-9092-260-5",

booktitle = "Proceedings of 4th International GOCE User Workshop",

publisher = "European Space Agency",

note = "4th International GOCE User Workshop ; Conference date: 31-03-2011 Through 01-04-2011",

url = "http://www.goce2011.org/",

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TY - GEN

T1 - Impact Of GOCE On The Nordic Gravity Field Modelling

AU - Yidiz, Hasan

AU - Forsberg, René

AU - Tscherning, C. C.

AU - Strykowski, Gabriel

N1 - Conference code: 4

PY - 2011

Y1 - 2011

N2 - GOCE level-2 Tzz and Txx gravity gradients at satellite altitude are used in combination as input data to predict surface free air gravity anomalies over the Nordic region using Least Square Collocation. We test the performance of using covariance functions createdseparately from Tzz gradients and surface free air gravity anomalies to predict terrestrial gravity anomalies with a direct comparison of 19 mgal level and much better (7-8 mgal) when surface data are filtered at the GOCE resolution. We found that the results are slightlydependent of covariance function. Combined with DTU10 Mean Sea Surface model, both the NKG-2004 quasi-geoid model of the Nordic and Baltic Area and the one obtained using second generation GOCE spherical harmonic coefficients based on time-wise method can successfully reproduce the higher level of the Baltic Sea relative to the Atlantic Ocean.

AB - GOCE level-2 Tzz and Txx gravity gradients at satellite altitude are used in combination as input data to predict surface free air gravity anomalies over the Nordic region using Least Square Collocation. We test the performance of using covariance functions createdseparately from Tzz gradients and surface free air gravity anomalies to predict terrestrial gravity anomalies with a direct comparison of 19 mgal level and much better (7-8 mgal) when surface data are filtered at the GOCE resolution. We found that the results are slightlydependent of covariance function. Combined with DTU10 Mean Sea Surface model, both the NKG-2004 quasi-geoid model of the Nordic and Baltic Area and the one obtained using second generation GOCE spherical harmonic coefficients based on time-wise method can successfully reproduce the higher level of the Baltic Sea relative to the Atlantic Ocean.

M3 - Article in proceedings

SN - 978-92-9092-260-5

BT - Proceedings of 4th International GOCE User Workshop

PB - European Space Agency

T2 - 4th International GOCE User Workshop

Y2 - 31 March 2011 through 1 April 2011

ER -

Impact Of GOCE On The Nordic Gravity Field Modelling

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