GOCO05c: A New Combined Gravity Field Model Based on Full Normal Equations and Regionally Varying Weighting

Thomas Fecher, Roland Pail, Thomas Gruber, Wolf-Dieter Schuh, Jürgen Kusche, Jan Martin Brockmann, Ina Loth, Sven Müller, Annette Eicker, Judith Schall, Torsten Mayer-Gürr, Andreas Kvas, Beate Klinger, Daniel Rieser, Norbert Zehentner, Oliver Baur, Eduard Höck, Sandro Krauß, Adrian Jäggi, Ulrich Meyer & 2 others Lars Prange, Andrea Maier

Research output: Contribution to journalArticleResearchpeer-review

Abstract

GOCO05c is a gravity field model computed as a combined solution of a satellite-only model and a global data set of gravity anomalies. It is resolved up to degree and order 720. It is the first model applying regionally varying weighting. Since this causes strong correlations among all gravity field parameters, the resulting full normal equation system with a size of 2 TB had to be solved rigorously by applying high-performance computing. GOCO05c is the first combined gravity field model independent of EGM2008 that contains GOCE data of the whole mission period. The performance of GOCO05c is externally validated by GNSS–levelling comparisons, orbit tests, and computation of the mean dynamic topography, achieving at least the quality of existing high-resolution models. Results show that the additional GOCE information is highly beneficial in insufficiently observed areas, and that due to the weighting scheme of individual data the spectral and spatial consistency of the model is significantly improved. Due to usage of fill-in data in specific regions, the model cannot be used for physical interpretations in these regions.
Original languageEnglish
Pages (from-to)571-590
JournalSurveys in geophyhsics
Volume2017
Issue number38
DOIs
Publication statusPublished - 7 Jan 2017

Fingerprint

gravity field
Gravitation
gravitation
GOCE
gravity anomalies
gravity anomaly
Topography
topography
Orbits
fill
Satellites
orbits
causes
high resolution

Fields of Expertise

  • Sustainable Systems

Cite this

GOCO05c: A New Combined Gravity Field Model Based on Full Normal Equations and Regionally Varying Weighting. / Fecher, Thomas; Pail, Roland; Gruber, Thomas; Schuh, Wolf-Dieter; Kusche, Jürgen; Brockmann, Jan Martin; Loth, Ina; Müller, Sven; Eicker, Annette; Schall, Judith; Mayer-Gürr, Torsten; Kvas, Andreas; Klinger, Beate; Rieser, Daniel; Zehentner, Norbert; Baur, Oliver; Höck, Eduard; Krauß, Sandro; Jäggi, Adrian; Meyer, Ulrich; Prange, Lars; Maier, Andrea.

In: Surveys in geophyhsics, Vol. 2017, No. 38, 07.01.2017, p. 571-590.

Research output: Contribution to journalArticleResearchpeer-review

Fecher, T, Pail, R, Gruber, T, Schuh, W-D, Kusche, J, Brockmann, JM, Loth, I, Müller, S, Eicker, A, Schall, J, Mayer-Gürr, T, Kvas, A, Klinger, B, Rieser, D, Zehentner, N, Baur, O, Höck, E, Krauß, S, Jäggi, A, Meyer, U, Prange, L & Maier, A 2017, 'GOCO05c: A New Combined Gravity Field Model Based on Full Normal Equations and Regionally Varying Weighting' Surveys in geophyhsics, vol. 2017, no. 38, pp. 571-590. https://doi.org/10.1007/s10712-016-9406-y
Fecher, Thomas ; Pail, Roland ; Gruber, Thomas ; Schuh, Wolf-Dieter ; Kusche, Jürgen ; Brockmann, Jan Martin ; Loth, Ina ; Müller, Sven ; Eicker, Annette ; Schall, Judith ; Mayer-Gürr, Torsten ; Kvas, Andreas ; Klinger, Beate ; Rieser, Daniel ; Zehentner, Norbert ; Baur, Oliver ; Höck, Eduard ; Krauß, Sandro ; Jäggi, Adrian ; Meyer, Ulrich ; Prange, Lars ; Maier, Andrea. / GOCO05c: A New Combined Gravity Field Model Based on Full Normal Equations and Regionally Varying Weighting. In: Surveys in geophyhsics. 2017 ; Vol. 2017, No. 38. pp. 571-590.
@article{0a6608d15afa405eafef669017876d48,
title = "GOCO05c: A New Combined Gravity Field Model Based on Full Normal Equations and Regionally Varying Weighting",
abstract = "GOCO05c is a gravity field model computed as a combined solution of a satellite-only model and a global data set of gravity anomalies. It is resolved up to degree and order 720. It is the first model applying regionally varying weighting. Since this causes strong correlations among all gravity field parameters, the resulting full normal equation system with a size of 2 TB had to be solved rigorously by applying high-performance computing. GOCO05c is the first combined gravity field model independent of EGM2008 that contains GOCE data of the whole mission period. The performance of GOCO05c is externally validated by GNSS–levelling comparisons, orbit tests, and computation of the mean dynamic topography, achieving at least the quality of existing high-resolution models. Results show that the additional GOCE information is highly beneficial in insufficiently observed areas, and that due to the weighting scheme of individual data the spectral and spatial consistency of the model is significantly improved. Due to usage of fill-in data in specific regions, the model cannot be used for physical interpretations in these regions.",
author = "Thomas Fecher and Roland Pail and Thomas Gruber and Wolf-Dieter Schuh and J{\"u}rgen Kusche and Brockmann, {Jan Martin} and Ina Loth and Sven M{\"u}ller and Annette Eicker and Judith Schall and Torsten Mayer-G{\"u}rr and Andreas Kvas and Beate Klinger and Daniel Rieser and Norbert Zehentner and Oliver Baur and Eduard H{\"o}ck and Sandro Krau{\ss} and Adrian J{\"a}ggi and Ulrich Meyer and Lars Prange and Andrea Maier",
year = "2017",
month = "1",
day = "7",
doi = "10.1007/s10712-016-9406-y",
language = "English",
volume = "2017",
pages = "571--590",
journal = "Surveys in geophyhsics",
issn = "0169-3298",
publisher = "Springer Netherlands",
number = "38",

}

TY - JOUR

T1 - GOCO05c: A New Combined Gravity Field Model Based on Full Normal Equations and Regionally Varying Weighting

AU - Fecher, Thomas

AU - Pail, Roland

AU - Gruber, Thomas

AU - Schuh, Wolf-Dieter

AU - Kusche, Jürgen

AU - Brockmann, Jan Martin

AU - Loth, Ina

AU - Müller, Sven

AU - Eicker, Annette

AU - Schall, Judith

AU - Mayer-Gürr, Torsten

AU - Kvas, Andreas

AU - Klinger, Beate

AU - Rieser, Daniel

AU - Zehentner, Norbert

AU - Baur, Oliver

AU - Höck, Eduard

AU - Krauß, Sandro

AU - Jäggi, Adrian

AU - Meyer, Ulrich

AU - Prange, Lars

AU - Maier, Andrea

PY - 2017/1/7

Y1 - 2017/1/7

N2 - GOCO05c is a gravity field model computed as a combined solution of a satellite-only model and a global data set of gravity anomalies. It is resolved up to degree and order 720. It is the first model applying regionally varying weighting. Since this causes strong correlations among all gravity field parameters, the resulting full normal equation system with a size of 2 TB had to be solved rigorously by applying high-performance computing. GOCO05c is the first combined gravity field model independent of EGM2008 that contains GOCE data of the whole mission period. The performance of GOCO05c is externally validated by GNSS–levelling comparisons, orbit tests, and computation of the mean dynamic topography, achieving at least the quality of existing high-resolution models. Results show that the additional GOCE information is highly beneficial in insufficiently observed areas, and that due to the weighting scheme of individual data the spectral and spatial consistency of the model is significantly improved. Due to usage of fill-in data in specific regions, the model cannot be used for physical interpretations in these regions.

AB - GOCO05c is a gravity field model computed as a combined solution of a satellite-only model and a global data set of gravity anomalies. It is resolved up to degree and order 720. It is the first model applying regionally varying weighting. Since this causes strong correlations among all gravity field parameters, the resulting full normal equation system with a size of 2 TB had to be solved rigorously by applying high-performance computing. GOCO05c is the first combined gravity field model independent of EGM2008 that contains GOCE data of the whole mission period. The performance of GOCO05c is externally validated by GNSS–levelling comparisons, orbit tests, and computation of the mean dynamic topography, achieving at least the quality of existing high-resolution models. Results show that the additional GOCE information is highly beneficial in insufficiently observed areas, and that due to the weighting scheme of individual data the spectral and spatial consistency of the model is significantly improved. Due to usage of fill-in data in specific regions, the model cannot be used for physical interpretations in these regions.

U2 - 10.1007/s10712-016-9406-y

DO - 10.1007/s10712-016-9406-y

M3 - Article

VL - 2017

SP - 571

EP - 590

JO - Surveys in geophyhsics

JF - Surveys in geophyhsics

SN - 0169-3298

IS - 38

ER -