Released
Dataset

The experimental gravity field model XGM2019e

Cite as:

Zingerle, Philipp; Pail, Roland; Gruber, Thomas; Oikonomidou, Xanthi (2019): The experimental gravity field model XGM2019e. GFZ Data Services. http://doi.org/10.5880/ICGEM.2019.007

Status

I   N       R   E   V   I   E   W : Zingerle, Philipp; Pail, Roland; Gruber, Thomas; Oikonomidou, Xanthi (2019): The experimental gravity field model XGM2019e. GFZ Data Services. http://doi.org/10.5880/ICGEM.2019.007

Abstract

GM2019e is a combined global gravity field model represented through spheroidal harmonics up to d/o 5399, corresponding to a spatial resolution of 2’ (~4 km). As data sources it includes the satellite model GOCO06s in the longer wavelength area combined with terrestrial measurements for the shorter wavelengths. The terrestrial data itself consists over land and ocean of gravity anomalies provided by courtesy of NGA (identical to XGM2016, having a resolution of 15’) augmented with topographically derived gravity over land (EARTH2014). Over the oceans, gravity anomalies derived from satellite altimetry are used (DTU13, in consistency with the NGA dataset).

The combination of the satellite data with the terrestrial observations is performed by using full normal equations up to d/o 719 (15’). Beyond d/o 719, a block-diagonal least-squares solution is calculated for the high-resolution terrestrial data (from topography and altimetry). All calculations are performed in the spheroidal harmonic domain.

In the spectral band up to d/o 719 the new model shows over land a slightly improved behavior over preceding models such as XGM2016, EIGEN6c4 or EGM2008 when comparing it to independent GPS leveling data. Over land and in the spectral range above d/o 719 the accuracy of XGM2019e suffers from the sole use of topographic forward modelling; Hence, errors are increased in well-surveyed areas compared to models containing real gravity data, e.g. EIGEN6c4 or EGM2008. However, the performance of XGM2019e can be considered as globally more homogeneous and independent from existing high resolution global models. Over the oceans the model exhibits an improved performance throughout the complete spectrum (equal or better than preceding models).

Contact

  • Zingerle, Philipp; Institute of Astronomical and Physical Geodesy, Technical University of Munich, Germany;

Contributors

Ince, Elmas Sinem; Reißland, Sven

Keywords

geodesy, global gravity field model, ICGEM, GOCO, GOCE

GCMD Science Keywords

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      • creators
        • creator
          • creatorName: Zingerle, Philipp
          • givenName: Philipp
          • familyName: Zingerle
          • affiliation: Institute of Astronomical and Physical Geodesy, Technical University of Munich, Germany
        • creator
          • creatorName: Pail, Roland
          • givenName: Roland
          • familyName: Pail
          • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0002-4364-4012
          • affiliation: Institute of Astronomical and Physical Geodesy, Technical University of Munich, Germany
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          • affiliation: University Bern, Bern, Switzerland
        • creator
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          • givenName: Xanthi
          • familyName: Oikonomidou
          • affiliation: Institute of Astronomical and Physical Geodesy, Technical University of Munich, Germany
      • titles
        • title (xml:lang=eng): The experimental gravity field model XGM2019e
      • publisher: GFZ Data Services
      • publicationYear: 2019
      • subjects
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        • subject: global gravity field model
        • subject: ICGEM
        • subject: GOCO
        • subject: GOCE
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          • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0002-3393-1392
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
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          • familyName: Reißland
          • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0001-6293-5336
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • language: eng
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        • relatedIdentifier (relatedIdentifierType=DOI relationType=Cites): 10.5880/ICGEM.2019.002
        • relatedIdentifier (relatedIdentifierType=DOI relationType=Cites): 10.5880/icgem.2017.003
        • relatedIdentifier (relatedIdentifierType=DOI relationType=Cites): 10.1029/2011JB008916
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      • Entry_Title: The experimental gravity field model XGM2019e
      • Data_Set_Citation
        • Dataset_Creator: Zingerle, Philipp; Pail, Roland; Gruber, Thomas; Oikonomidou, Xanthi
        • Dataset_Title: The experimental gravity field model XGM2019e
        • Dataset_Release_Date: 2019
        • Dataset_Release_Place: Potsdam, Germany
        • Dataset_Publisher: GFZ Data Services
        • Online_Resource: http://dx.doi.org/10.5880/ICGEM.2019.007
      • Parameters
        • Category: EARTH SCIENCE
        • Topic: SOLID EARTH
        • Term: GEODETICS
        • Variable_Level_1: GEOID CHARACTERISTICS
      • Parameters
        • Category: EARTH SCIENCE
        • Topic: SOLID EARTH
        • Term: GRAVITY/GRAVITATIONAL FIELD
        • Variable_Level_1: GRAVITY
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      • Keyword: geodesy
      • Keyword: global gravity field model
      • Keyword: ICGEM
      • Keyword: GOCO
      • Keyword: GOCE
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        • Northernmost_Latitude: 90
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      • Summary
        • Abstract: GM2019e is a combined global gravity field model represented through spheroidal harmonics up to d/o 5399, corresponding to a spatial resolution of 2’ (~4 km). As data sources it includes the satellite model GOCO06s in the longer wavelength area combined with terrestrial measurements for the shorter wavelengths. The terrestrial data itself consists over land and ocean of gravity anomalies provided by courtesy of NGA (identical to XGM2016, having a resolution of 15’) augmented with topographically derived gravity over land (EARTH2014). Over the oceans, gravity anomalies derived from satellite altimetry are used (DTU13, in consistency with the NGA dataset). The combination of the satellite data with the terrestrial observations is performed by using full normal equations up to d/o 719 (15’). Beyond d/o 719, a block-diagonal least-squares solution is calculated for the high-resolution terrestrial data (from topography and altimetry). All calculations are performed in the spheroidal harmonic domain. In the spectral band up to d/o 719 the new model shows over land a slightly improved behavior over preceding models such as XGM2016, EIGEN6c4 or EGM2008 when comparing it to independent GPS leveling data. Over land and in the spectral range above d/o 719 the accuracy of XGM2019e suffers from the sole use of topographic forward modelling; Hence, errors are increased in well-surveyed areas compared to models containing real gravity data, e.g. EIGEN6c4 or EGM2008. However, the performance of XGM2019e can be considered as globally more homogeneous and independent from existing high resolution global models. Over the oceans the model exhibits an improved performance throughout the complete spectrum (equal or better than preceding models).
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    • resource
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      • creator
        • creatorName: Zingerle, Philipp
        • givenName: Philipp
        • familyName: Zingerle
        • affiliation: Institute of Astronomical and Physical Geodesy, Technical University of Munich, Germany
      • creator
        • creatorName: Pail, Roland
        • givenName: Roland
        • familyName: Pail
        • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0002-4364-4012
        • affiliation: Institute of Astronomical and Physical Geodesy, Technical University of Munich, Germany
      • creator
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        • givenName: Thomas
        • familyName: Gruber
        • nameIdentifier (nameIdentifierScheme=ORCID): 0000-0001-5210-1995
        • affiliation: University Bern, Bern, Switzerland
      • creator
        • creatorName: Oikonomidou, Xanthi
        • givenName: Xanthi
        • familyName: Oikonomidou
        • affiliation: Institute of Astronomical and Physical Geodesy, Technical University of Munich, Germany

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    License: CC BY 4.0