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Metadata Identifier: gov.noaa.ngdc.mgg.geophysical_models:Magnetic_Field_Grid_Calculator
MD_DataIdentification
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Magnetic Field Grid Calculator |
The Magnetic Field Properties Calculator will computes the estimated values
of Earth's magnetic field(declination, inclination, vertical component, northerly
component, easterly component, horizontal intensity, or total intensity), for a specific
location, elevation and date or range of dates based on the current International
Geomagnetic Reference Field (IGRF). The calculated result is a grid that contains
the calculated component and the annual change of the component over the geographical
area specified. While results are typically accurate to 30 minutes of arc, users
should be aware that solar storms can cause intense, short-term disturbances in the
magnetic field.
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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://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/#igrfgrid |
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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 Properties Grid Calculator creates a Comma Seperated Variable (CSV)
document which indicates the declination, inclination, horizontal intensity, northerly
component, easterly component, vertical component, or total field at the geographical
range queried and reports the annual change for the parameter specified.
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XML Format |
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The Magnetic Field Properties Grid Calculator creates an XML document which indicates
the declination, inclination, horizontal intensity, northerly component, easterly
component, vertical component, or total field at the geographical range queried and
reports the annual change for the parameter specified.
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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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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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