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Metadata Identifier: gov.noaa.ngdc.mgg.geophysical_models:Magnetic_Field_Calculator
MD_DataIdentification
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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.
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SV_Identification
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http://gcmd.nasa.gov/MailComments/MailComments.jsf?rcpt=gcmduso |
GCMD Feedback Form |
Have a Comment for the GCMD? |
information |
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GCMD Keyword Page |
http://gcmd.nasa.gov/learn/keyword_list.html |
GCMD Keywords Page |
This page describes the NASA GCMD Keywords, how to reference those keywords and provides
download instructions.
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information |
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http://ngdc.noaa.gov/geomag/WMM/data/WMM2010/WMM2010_Report.pdf |
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http://www.epsg-registry.org/ |
European Petroleum Survey Group Geodetic Parameter Registry |
Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured
dataset of Coordinate Reference Systems and Coordinate Transformations.
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search |
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http://www.epsg-registry.org/export.htm?gml=urn:ogc:def:crs:EPSG::4326 |
WGS 84 |
GML of World Geodetic System 1984 coordinate reference system. |
information |
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http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html |
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http://www.ngdc.noaa.gov/geomag-web/#igrfwmm |
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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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urn:ogc:def:crs:EPSG::4326 |
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Bounding Box |
Temporal Extent |
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-180 |
180 |
90 |
-90 |
1900-01-01 |
2014-12-31 |
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CSV Format |
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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.
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HTML Format |
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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.
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XML Format |
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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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NGDC Copyright |
Produced by the NOAA National Geophysical Data Center. Not subject to
copyright protection within the United States.
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WGS 84 |
urn:ogc:def:crs:EPSG::4326 |
World Geodetic System 1984 |
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Northerly Intensity |
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Easterly Intensity |
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Vertical Intensity |
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Horizontal Intensity |
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Total Intensity |
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Inclination |
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Declination |
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Grid Variation |
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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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The US/UK World Magnetic Model for 2010-2015 |
2009-12-01 |
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".
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User input of area of interest and time for desired data grid into
a web interface.
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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.
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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.
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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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