International Combination Service for Time-variable Gravity Fields (COST-G) Monthly GRACE-FO Series

Cite as:

Meyer, Ulrich; Lasser, Martin; Jaeggi, Adrian; Dahle, Christoph; Flechtner, Frank; Kvas, Andreas; Behzadpour, Saniya; Mayer-Gürr, Torsten; Lemoine, Jean-Michel; Koch, Igor; Flury, Jakob; Bourgogne, Stéphane (2020): International Combination Service for Time-variable Gravity Fields (COST-G) Monthly GRACE-FO Series. V. 01. GFZ Data Services. https://doi.org/10.5880/ICGEM.COST-G.002

Status

I N R E V I E W : Meyer, Ulrich; Lasser, Martin; Jaeggi, Adrian; Dahle, Christoph; Flechtner, Frank; Kvas, Andreas; Behzadpour, Saniya; Mayer-Gürr, Torsten; Lemoine, Jean-Michel; Koch, Igor; Flury, Jakob; Bourgogne, Stéphane (2020): International Combination Service for Time-variable Gravity Fields (COST-G) Monthly GRACE-FO Series. V. 01. GFZ Data Services. https://doi.org/10.5880/ICGEM.COST-G.002

Abstract

Operationally combined monthly gravity fields of the GRACE-FO satellite mission in spherical harmonic representation (Level-2 product) generated by the Combination Service for Time-variable Gravity Fields (COST-G; Jäggi et al. (2020):http://dx.doi.org/10.1007/1345_2020_109), a product center for time-variable gravity fields of IAG's International Gravity Field Service (IGFS). COST-G_GRACE-FO_RL01_OP is a combination of AIUB-GRACE-FO_op, GFZ-RL06 (GFO), GRGS-RL05 (unconstrained solution), ITSG-Grace_op, LUH-GRACE-FO, CSR-RL06 (GFO) and JPL-RL06 (GFO). The original time-series were provided by the analysis centers (ACs) and partner analysis centers (PCs) of COST-G.

Methods

COST-G performs a harmonization and quality control of the individual input solutions of the COST-G ACs and PCs. The combination of COST-G_GRACE-FO_RL01_OP is then performed applying variance component estimation on the solution level (Jean et al., 2018): https://doi.org/10.1007/s00190-018-1123-5). The resulting COST-G combined gravity fields are validated assessing their signal and noise content in the spectral and spatial domain (Meyer et al., 2019: https://doi.org/10.1007/s00190-019-01274-6) and by the COST-G Product Evaluation Group (PEG).

Authors

Meyer, Ulrich;AIUB Astronomical Institute University of Bern, Bern, Switzerland
Lasser, Martin;AIUB Astronomical Institute University of Bern, Bern, Switzerland
Jaeggi, Adrian;AIUB Astronomical Institute University of Bern, Bern, Switzerland
Dahle, Christoph;GFZ German Research Centre for Geosciences, Potsdam, Germany
Flechtner, Frank;GFZ German Research Centre for Geosciences, Potsdam, Germany
Kvas, Andreas;IFG Institute of Geodesy, Graz University of Technology, Graz, Austria
Behzadpour, Saniya;IFG Institute of Geodesy, Graz University of Technology, Graz, Austria
Mayer-Gürr, Torsten;IFG Institute of Geodesy, Graz University of Technology, Graz, Austria
Lemoine, Jean-Michel;CNES Centre National d’Etudes Spatiales, Toulouse, France
Koch, Igor;Leibniz University Hannover, Hannover, Germany
Flury, Jakob;Leibniz University Hannover, Hannover, Germany
Bourgogne, Stéphane;Stellar Space Studies, Toulouse, France

Contact

Meyer, Ulrich (Analysis Center Coordinator) ; AIUB Astronomical Institute University of Bern, Bern, Switzerland; ➦

Keywords

COST-G, IGFS Product Center, Combined solutions, Time variable gravity

GCMD Science Keywords

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        endPosition: 2020-07-31
  - distributionInfo
    - MD_Distribution
      - transferOptions
        MD_DigitalTransferOptions
        onLine
        CI_OnlineResource
        linkage
        URL: http://doi.org/10.5880/ICGEM.COST-G.002
        protocol
        CharacterString: WWW:LINK-1.0-http--link
        name
        CharacterString: Data Access - DOI
        description
        CharacterString: Data Access - DOI
        function
        CI_OnLineFunctionCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode codeListValue=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode_information): information
  - dataQualityInfo
    - DQ_DataQuality
      - scope
        DQ_Scope
        level
        MD_ScopeCode (codeListValue=dataset codeList=http://www.isotc211.org/2005/resources/codeList.xml#MD_ScopeCode):
      - lineage
        LI_Lineage
        statement
        CharacterString: COST-G performs a harmonization and quality control of the individual input solutions of the COST-G ACs and PCs. The combination of COST-G_GRACE-FO_RL01_OP is then performed applying variance component estimation on the solution level (Jean et al., 2018): https://doi.org/10.1007/s00190-018-1123-5). The resulting COST-G combined gravity fields are validated assessing their signal and noise content in the spectral and spatial domain (Meyer et al., 2019: https://doi.org/10.1007/s00190-019-01274-6) and by the COST-G Product Evaluation Group (PEG).