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Metadata Identifier: gov.noaa.ngdc.mgg.geophysical_models:Magnetic_Field_Calculator

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 Magnetic Field Calculator The Magnetic Field Calculator will calculate the total magnetic field, including components (declination, inclination, horizontal intensity, northerly intensity, easterly intensity, vertical intensity) and the annual change for each. Each calculation is for a specific location, elevation and date or range of dates. The calculated result can be obtained from two separate geomagnetic models, the IGRF11 or the WMM2010. Declination is calculated using the current World Magnetic Model (WMM) or International Geomagnetic Reference Field (IGRF) model. While results are typically accurate to 30 minutes of arc, users should be aware that several environmental factors can cause disturbances in the magnetic field.
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 IGRF11 Spherical Harmonic Model.
    2010-10-12
1 International Geomagnetic Reference Field 11
    2010-10-12
1 Magnetic Field Calculator
    2009-12-01
Unresolved Xlinks
GCMD Science Keywords at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:descriptiveKeywords[1]/gmd:MD_Keywords[1]/gmd:thesaurusName[1]
GCMD Location Keywords at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:descriptiveKeywords[2]/gmd:MD_Keywords[1]/gmd:thesaurusName[1]
WMM2010 Report at: /gmi:MI_Metadata/gmd:dataQualityInfo[2]/gmd:DQ_DataQuality[1]/gmd:lineage[1]/gmd:LI_Lineage[1]/gmd:source[1]/gmd:LI_Source[1]/gmd:sourceCitation[1]
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CI_Series

none found
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CI_ResponsibleParty

Count Component Individual Organization Position Email Role Linkage
1 http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
1 NCEI (publisher) DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce publisher
4 DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce distributor http://www.ngdc.noaa.gov/geomag-web/#igrfwmm
1 International Association of Geomagnetism and Aeronomy (IAGA) resourceProvider http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
Unresolved Xlinks
Brian Meyer at: /gmi:MI_Metadata/gmd:contact[1]
Geomagnetic Modeling Team at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:citation[1]/gmd:CI_Citation[1]/gmd:citedResponsibleParty[2]
Geomagnetic Modeling Team at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:pointOfContact[1]
Geomagnetic Modeling Team at: /gmi:MI_Metadata/gmd:distributionInfo[1]/gmd:MD_Distribution[1]/gmd:distributor[1]/gmd:MD_Distributor[1]/gmd:distributorContact[1]
Anna Milan at: /gmi:MI_Metadata/gmd:metadataMaintenance[1]/gmd:MD_MaintenanceInformation[1]/gmd:contact[1]
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CI_OnlineResource

Count Component Linkage Name Description Function
2 http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html
4 http://www.ngdc.noaa.gov/geomag-web/#igrfwmm
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MD_Identifier or RS_Identifier

Count Component Code
1 Processing steps were carried out collectively by the developers of the model. These developers are listed as authors of the associated paper "International Geomagnetic Reference Field: the eleventh generation".
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EX_Extent

Bounding Box Temporal Extent
Count Component Description West East North South Start End
1 -180 180 90 -90 1900-01-01 2014-12-31
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EX_GeographicBoundingBox

Count Component West East North South
1 -180 180 90 -90
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EX_TemporalExtent

Count Component Start End
1 1900-01-01 2014-12-31
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MD_Format

Count Component Name Version specification
1 CSV Format 1 The Magnetic Field Calculator creates an Comma Seperated Variable (CSV) file which indicates the declination, inclination, horizontal intensity, northerly component, easterly component, vertical component, and total field at the location queried and reports the annual change for each parameter.
1 HTML Format 1 The Magnetic Field Calculator creates an HTML pop-up window which indicates the declination, inclination, horizontal intensity, northerly component, easterly component, vertical component, and total field at the location queried and reports the annual change for each parameter.
1 XML Format 1 The Magnetic Field Calculator creates an XML document which indicates the declination, inclination, horizontal intensity, northerly component, easterly component, vertical component, and total field at the location queried and reports the annual change for each parameter.
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MD_Medium

none found
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MD_Constraints

Unresolved Xlinks
NOAA Disclaimer at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:resourceConstraints[1]
NGDC Copyright at: /gmi:MI_Metadata/gmd:identificationInfo[1]/gmd:MD_DataIdentification[1]/gmd:resourceConstraints[2]
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MD_ReferenceSystem

Unresolved Xlinks
WGS 84 at: /gmi:MI_Metadata/gmd:referenceSystemInfo[1]
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MD_GridSpatialRepresentation

Count Component Number of Dimensions Cell Geometry Code
1 3 point
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MD_Georeferenceable or MI_Georeferenceable

none found
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MD_Georectified or MI_Georectified

none found
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MD_Dimension

none found
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MD_CoverageDescription or MI_CoverageDescription

Count Component Attribute Description Content Type
1 Grid Cell
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MD_Band or MI_Band

Count Component Identifier Descriptor
1 Northerly Intensity
1 Easterly Intensity
1 Vertical Intensity
1 Horizontal Intensity
1 Total Intensity
1 Inclination
1 Declination
1 Grid Variation
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MI_RangeElementDescription

none found
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MD_AggregateInformation

none found
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LE_Source or LI_Source

Count Component Title Date Description
1 Unknown The WMM was developed jointly by the National Geophysical Data Center (NGDC, Boulder CO, USA) and the British Geological Survey (BGS, Edinburgh, Scotland). The model is compiled using satellite and observatory measurements and observations. More information on the development of the WMM2010 can be found in the associated paper "The US/UK Magnetic Model 2010-2015".
WMM2010 Report at Xpath: /gmi:MI_Metadata/gmd:dataQualityInfo[2]/gmd:DQ_DataQuality[1]/gmd:lineage[1]/gmd:LI_Lineage[1]/gmd:source[1]/gmd:LI_Source[1]/gmd:sourceCitation[1]
1 IGRF 11 International Geomagnetic Reference Field 11 2010-10-12 The IGRF is the product of a collaborative effort between magnetic field modellers and the institutes involved in collecting and disseminating magnetic field data from satellites and from observatories and surveys around the world. The IGRF is a series of mathematical models of the Earth's main field and its annual rate of change (secular variation).
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LE_ProcessStep or LI_ProcessStep

Count Component DateTime Description
1 User input of area of interest and time for desired data grid into a web interface.
1 User data is sent via HTTP request to a java servelet hosted on a local NGDC server. This checks that all of the necessary information to run the model executable correctly is present and in the correct format.
1 NGDC server accesses a C executable, in this case the IGRF executable, and inputs the user data and runs the executable to obtain desired output parameters in XML format.
WMM2010 Report at Xpath: /gmi:MI_Metadata/gmd:dataQualityInfo[2]/gmd:DQ_DataQuality[1]/gmd:lineage[1]/gmd:LI_Lineage[1]/gmd:processStep[3]/gmi:LE_ProcessStep[1]/gmi:processingInformation[1]/gmi:LE_Processing[1]/gmi:algorithm[2]/gmi:LE_Algorithm[1]/gmi:citation[1]
1 The XML created by the executable is sent back to NGDC server and input into the Java servelet which reformats the output into the format designated by the user at the begining of the process. This reformatted information is returned to the User's webpage.
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MI_Operation

none found
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MI_Platform

none found
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MI_Instrument

none found
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