Released
Dataset

The GOCE-only global gravity field model IfE_GOCE05s

Cite as:

Wu, Hu; Müller, Jürgen; Brieden, Phillip (2017): The GOCE-only global gravity field model IfE_GOCE05s. GFZ Data Services. http://doi.org/10.5880/icgem.2017.006

Status

I   N       R   E   V   I   E   W : Wu, Hu; Müller, Jürgen; Brieden, Phillip (2017): The GOCE-only global gravity field model IfE_GOCE05s. GFZ Data Services. http://doi.org/10.5880/icgem.2017.006

Abstract

IfE_GOCE05s is a GOCE-only global gravity field model, which was developed at the Institut für Erdmessung (IfE), Leibniz Universität Hannover, Germany. The observations with a time span from 1 November 2009 to 20 October 2013 are used for the model recovery. The GOCE precise kinematic orbit with 1-s sampling rate is processed for the gravity field up to degree/order 150, while the three main diagonal gravity gradients are down-sampled to 2 s and used to recover the model up to degree/order 250. With two additional Kaula’s regularizations, the combined model “IfE_GOCE05s” is derived, with a maximum degree of 250.

To develop IfE_GOCE05s, the following GOCE data (01.11.2009 - 20.10.2013) was used:
* Orbits: SST_PKI_2, SST_IAQ_2;
* Gradients: EGG_GGT_2, EGG_IAQ_2.

None any priori gravity field information was used.


Processing procedures:

Gravity from orbits (SST):
* Acceleration approach was applied to the kinematic orbit data;
* PKI data was at 1 s sampling rate;
* Model was derived up to d/o (degree/order) 150;
* VCM (Variance-Covariance Matrix) was derived arc-wisely from the post-fit residuals.

Gravity from gradients (SGG):
* Gradients Vxx, Vyy and Vzz in the GRF (Gradiometer Reference Frame) were used;
* Gradients were down-sampled to 2 s;
* Model was derived up to d/o 250;
* VCM was estimated arc-wisely from the post-fit residuals.

Regularization:
* A strong Kaula-regularization was applied to constrain the (near-)zonal coefficients that are degraded by the polar gap problem;
* A slight Kaula-regularization was applied to improve the signal-to-noise ratio of the coefficients between d/o 201 and 250;
* The regularization parameters were empirically determined.

Combined solution:
* The normal equations for SST and SGG were summed wih proper weighting factors;
* Weighting factors for SST and SGG were determined from variance component estimation;
* A direct inversion was applied on the final normal equation.

Parameters

product_typegravity_field
modelnameIfE_GOCE05s
earth_gravity_constant0.3986004415E+15 [m3/s2]
radius0.6378136460E+07 [m]
max_degree250
errorsformal
normfully_normalized
tide_systemtide_free

Dataset Contact

  • Wu, Hu (Postdoc Resarcher) ; Institut für Erdmessung (IfE), Leibniz Universität Hannover;

Contributors

Ince, Sinem; Reißland, Sven

Keywords

ICGEM, global gravitational model, GOCE

GCMD Science Keywords

More Metadata

  • iso19115:  /  download xml
    • MD_Metadata (xsi:schemaLocation=http://www.isotc211.org/2005/gmd http://www.isotc211.org/2005/gmd/gmd.xsd)
      • fileIdentifier
        • CharacterString: doi:10.5880/icgem.2017.006
      • language
        • LanguageCode (codeList=http://www.loc.gov/standards/iso639-2/ codeListValue=eng): eng
      • characterSet
        • MD_CharacterSetCode (codeList=http://www.isotc211.org/2005/resources/codeList.xml#MD_CharacterSetCode codeListValue=utf8): 
      • hierarchyLevel
        • MD_ScopeCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ScopeCode codeListValue=): 
      • hierarchyLevelName
        • CharacterString: 
      • contact
        • CI_ResponsibleParty
          • organisationName
            • CharacterString: GFZ German Research Centre for Geosciences
          • contactInfo
            • CI_Contact
              • address
                • CI_Address
                  • electronicMailAddress
                    • CharacterString: 
              • onlineResource
                • CI_OnlineResource
                  • linkage
                    • URL: http://www.gfz-potsdam.de/
                  • function
                    • CI_OnLineFunctionCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_OnLineFunctionCode codeListValue=information): information
          • role
            • CI_RoleCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode codeListValue=pointOfContact): pointOfContact
      • dateStamp
        • Date: 2017-12-07
      • referenceSystemInfo
        • MD_ReferenceSystem
          • referenceSystemIdentifier
            • RS_Identifier
              • code
                • CharacterString: urn:ogc:def:crs:EPSG:4326
      • identificationInfo
        • MD_DataIdentification
          • citation
            • CI_Citation
              • title
                • CharacterString: The GOCE-only global gravity field model IfE_GOCE05s
              • date
                • CI_Date
                  • date
                    • Date: 2017-12-07
                  • dateType
                    • CI_DateTypeCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode codeListValue=revision): revision
              • identifier
                • MD_Identifier
                  • code
                    • CharacterString: doi:10.5880/icgem.2017.006
              • citedResponsibleParty
                • CI_ResponsibleParty
                  • individualName
                    • CharacterString: Wu, Hu
                  • organisationName
                    • CharacterString: Institut für Erdmessung (IfE), Leibniz Universität Hannover, Germany
                  • role
                    • CI_RoleCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode codeListValue=author): author
              • citedResponsibleParty
                • CI_ResponsibleParty
                  • individualName
                    • CharacterString: Müller, Jürgen
                  • organisationName
                    • CharacterString: Institut für Erdmessung (IfE), Leibniz Universität Hannover
                  • role
                    • CI_RoleCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode codeListValue=author): author
              • citedResponsibleParty
                • CI_ResponsibleParty
                  • individualName
                    • CharacterString: Brieden, Phillip
                  • organisationName
                    • CharacterString: Institut für Erdmessung (IfE), Leibniz Universität Hannover
                  • role
                    • CI_RoleCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode codeListValue=author): author
          • abstract
            • CharacterString: IfE_GOCE05s is a GOCE-only global gravity field model, which was developed at the Institut für Erdmessung (IfE), Leibniz Universität Hannover, Germany. The observations with a time span from 1 November 2009 to 20 October 2013 are used for the model recovery. The GOCE precise kinematic orbit with 1-s sampling rate is processed for the gravity field up to degree/order 150, while the three main diagonal gravity gradients are down-sampled to 2 s and used to recover the model up to degree/order 250. With two additional Kaula’s regularizations, the combined model “IfE_GOCE05s” is derived, with a maximum degree of 250. To develop IfE_GOCE05s, the following GOCE data (01.11.2009 - 20.10.2013) was used: * Orbits: SST_PKI_2, SST_IAQ_2; * Gradients: EGG_GGT_2, EGG_IAQ_2. None any priori gravity field information was used. Processing procedures: Gravity from orbits (SST): * Acceleration approach was applied to the kinematic orbit data; * PKI data was at 1 s sampling rate; * Model was derived up to d/o (degree/order) 150; * VCM (Variance-Covariance Matrix) was derived arc-wisely from the post-fit residuals. Gravity from gradients (SGG): * Gradients Vxx, Vyy and Vzz in the GRF (Gradiometer Reference Frame) were used; * Gradients were down-sampled to 2 s; * Model was derived up to d/o 250; * VCM was estimated arc-wisely from the post-fit residuals. Regularization: * A strong Kaula-regularization was applied to constrain the (near-)zonal coefficients that are degraded by the polar gap problem; * A slight Kaula-regularization was applied to improve the signal-to-noise ratio of the coefficients between d/o 201 and 250; * The regularization parameters were empirically determined. Combined solution: * The normal equations for SST and SGG were summed wih proper weighting factors; * Weighting factors for SST and SGG were determined from variance component estimation; * A direct inversion was applied on the final normal equation.
          • status
            • MD_ProgressCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#MD_ProgressCode codeListValue=Complete): Complete
          • pointOfContact
            • CI_ResponsibleParty
              • individualName
                • CharacterString: Wu, Hu
              • organisationName
                • CharacterString: Institut für Erdmessung (IfE), Leibniz Universität Hannover
              • positionName
                • CharacterString: Postdoc Resarcher
              • contactInfo
                • CI_Contact
                  • address
                    • CI_Address
                      • electronicMailAddress
                        • CharacterString: wuhu(_at_)ife.uni-hannover.de
              • role
                • CI_RoleCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_RoleCode codeListValue=pointOfContact): pointOfContact
          • descriptiveKeywords
            • MD_Keywords
              • keyword
                • CharacterString: ICGEM
              • keyword
                • CharacterString: global gravitational model
              • keyword
                • CharacterString: GOCE
          • descriptiveKeywords
            • MD_Keywords
              • keyword
                • CharacterString: EARTH SCIENCE > SOLID EARTH > GRAVITY/GRAVITATIONAL FIELD > GRAVITATIONAL FIELD
              • keyword
                • CharacterString: EARTH SCIENCE > SOLID EARTH > GEODETICS > GEOID CHARACTERISTICS
              • thesaurusName
                • CI_Citation
                  • title
                    • CharacterString: NASA/GCMD Earth Science Keywords
                  • date
                    • CI_Date
                      • date (gco:nilReason=missing): 
                      • dateType
                        • CI_DateTypeCode (codeList=http://www.isotc211.org/2005/resources/Codelist/gmxCodelists.xml#CI_DateTypeCode codeListValue=publication): publication
          • resourceConstraints (xlink:href=http://creativecommons.org/licenses/by/4.0/)
            • MD_Constraints
              • useLimitation
                • CharacterString: CC BY 4.0
          • resourceConstraints
            • MD_LegalConstraints
              • accessConstraints
                • MD_RestrictionCode (codeList=http://www.isotc211.org/2005/resources/codeList.xml#MD_RestrictionCode codeListValue=otherRestrictions): 
              • otherConstraints
                • CharacterString: CC BY 4.0
          • resourceConstraints
            • MD_SecurityConstraints
              • classification
                • MD_ClassificationCode (codeList=http://www.isotc211.org/2005/resources/codeList.xml#MD_ClassificationCode codeListValue=unclassified): 
          • aggregationInfo
            • MD_AggregateInformation
              • aggregateDataSetIdentifier
                • RS_Identifier
                  • code
                    • CharacterString: https://dgk.badw.de/fileadmin/user_upload/Files/DGK/docs/c-777.pdf
                  • codeSpace
                    • CharacterString: URL
              • associationType
                • DS_AssociationTypeCode (codeList=http://datacite.org/schema/kernel-4 codeListValue=Cites): Cites
          • language
            • CharacterString: eng
      • distributionInfo
        • MD_Distribution
          • transferOptions
            • MD_DigitalTransferOptions
              • onLine
                • CI_OnlineResource
                  • linkage
                    • URL: http://dx.doi.org/doi:10.5880/icgem.2017.006
                  • protocol
                    • CharacterString: WWW:LINK-1.0-http--link
                  • name
                    • CharacterString: Download
                  • description
                    • CharacterString: Download
                  • 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_download): download
  • datacite:  /  download xml
    • resource (xsi:schemaLocation=http://datacite.org/schema/kernel-4 http://schema.datacite.org/meta/kernel-4/metadata.xsd)
      • identifier (identifierType=DOI): 10.5880/icgem.2017.006
      • creators
        • creator
          • creatorName: Wu, Hu
          • givenName: Hu
          • familyName: Wu
          • affiliation: Institut für Erdmessung (IfE), Leibniz Universität Hannover, Germany
        • creator
          • creatorName: Müller, Jürgen
          • givenName: Jürgen
          • familyName: Müller
          • affiliation: Institut für Erdmessung (IfE), Leibniz Universität Hannover
        • creator
          • creatorName: Brieden, Phillip
          • givenName: Phillip
          • familyName: Brieden
          • affiliation: Institut für Erdmessung (IfE), Leibniz Universität Hannover
      • titles
        • title (xml:lang=eng): The GOCE-only global gravity field model IfE_GOCE05s
      • publisher: GFZ Data Services
      • publicationYear: 2017
      • subjects
        • subject: ICGEM
        • subject: global gravitational model
        • subject: GOCE
      • contributors
        • contributor (contributorType=DataCurator)
          • contributorName: Ince, Sinem
          • givenName: Sinem
          • familyName: Ince
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
        • contributor (contributorType=DataManager)
          • contributorName: Reißland, Sven
          • givenName: Sven
          • familyName: Reißland
          • affiliation: GFZ German Research Centre for Geosciences, Potsdam, Germany
      • language: eng
      • resourceType (resourceTypeGeneral=Dataset): Dataset
      • relatedIdentifiers
        • relatedIdentifier (relatedIdentifierType=URL relationType=Cites): https://dgk.badw.de/fileadmin/user_upload/Files/DGK/docs/c-777.pdf
      • sizes
        • size: 1197488 Bytes
        • size: 3 Files
      • formats
        • format: application/x-zip-compressed
        • format: application/octet-stream
        • format: application/octet-stream
      • rightsList
        • rights (rightsURI=http://creativecommons.org/licenses/by/4.0/): CC BY 4.0
      • descriptions
        • description (descriptionType=Abstract)
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
        • description (descriptionType=TechnicalInfo)
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
          • br: 
  • dif:  /  download xml
    • DIF (xsi:schemaLocation=http://gcmd.gsfc.nasa.gov/Aboutus/xml/dif/ http://gcmd.nasa.gov/Aboutus/xml/dif/dif_v9.8.2.xsd)
      • Entry_ID: 10.5880/icgem.2017.006
      • Entry_Title: The GOCE-only global gravity field model IfE_GOCE05s
      • Data_Set_Citation
        • Dataset_Creator: Wu, Hu; Müller, Jürgen; Brieden, Phillip
        • Dataset_Title: The GOCE-only global gravity field model IfE_GOCE05s
        • Dataset_Release_Date: 2017
        • Dataset_Release_Place: Potsdam, Germany
        • Dataset_Publisher: GFZ Data Services
        • Online_Resource: http://dx.doi.org/10.5880/icgem.2017.006
      • Parameters
        • Category: EARTH SCIENCE
        • Topic: SOLID EARTH
        • Term: GRAVITY/GRAVITATIONAL FIELD
        • Variable_Level_1: GRAVITATIONAL FIELD
      • Parameters
        • Category: EARTH SCIENCE
        • Topic: SOLID EARTH
        • Term: GEODETICS
        • Variable_Level_1: GEOID CHARACTERISTICS
      • ISO_Topic_Category: geoscientificInformation
      • Keyword: ICGEM
      • Keyword: global gravitational model
      • Keyword: GOCE
      • Data_Center
        • Data_Center_Name
          • Short_Name: Deutsches GeoForschungsZentrum GFZ
          • Long_Name: GFZ
        • Personnel
          • Role: DATA CENTER CONTACT
          • Last_Name: Deutsches GeoForschungsZentrum GFZ
      • Summary
        • Abstract: IfE_GOCE05s is a GOCE-only global gravity field model, which was developed at the Institut für Erdmessung (IfE), Leibniz Universität Hannover, Germany. The observations with a time span from 1 November 2009 to 20 October 2013 are used for the model recovery. The GOCE precise kinematic orbit with 1-s sampling rate is processed for the gravity field up to degree/order 150, while the three main diagonal gravity gradients are down-sampled to 2 s and used to recover the model up to degree/order 250. With two additional Kaula’s regularizations, the combined model “IfE_GOCE05s” is derived, with a maximum degree of 250. To develop IfE_GOCE05s, the following GOCE data (01.11.2009 - 20.10.2013) was used: * Orbits: SST_PKI_2, SST_IAQ_2; * Gradients: EGG_GGT_2, EGG_IAQ_2. None any priori gravity field information was used.
      • Metadata_Name: DIF
      • Metadata_Version: 9.8.2
  • parameters:  /  download xml
    • envelope
      • parameters
        • field (type=product_type): gravity_field
        • field (type=modelname): IfE_GOCE05s
        • field (type=earth_gravity_constant): 0.3986004415E+15 [m3/s2]
        • field (type=radius): 0.6378136460E+07 [m]
        • field (type=max_degree): 250
        • field (type=errors): formal
        • field (type=norm): fully_normalized
        • field (type=tide_system): tide_free
  • escidoc:  /  download xml
    • resource
      • title (xml:lang=eng): The GOCE-only global gravity field model IfE_GOCE05s
      • creator
        • creatorName: Wu, Hu
        • givenName: Hu
        • familyName: Wu
        • affiliation: Institut für Erdmessung (IfE), Leibniz Universität Hannover, Germany
      • creator
        • creatorName: Müller, Jürgen
        • givenName: Jürgen
        • familyName: Müller
        • affiliation: Institut für Erdmessung (IfE), Leibniz Universität Hannover
      • creator
        • creatorName: Brieden, Phillip
        • givenName: Phillip
        • familyName: Brieden
        • affiliation: Institut für Erdmessung (IfE), Leibniz Universität Hannover

Files

License: CC BY 4.0