Geomagnetism: Difference between revisions
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[http://casoilresource.lawr.ucdavis.edu/drupal/node/560 Detailed Magnetic Declination] map. | [http://casoilresource.lawr.ucdavis.edu/drupal/node/560 Detailed Magnetic Declination] map. | ||
They also cite the NOAA website, which has | They also cite the NOAA website, which has [http://www.ngdc.noaa.gov/IAGA/vmod/igrf.html IGRF] and [http://www.ngdc.noaa.gov/geomag/WMM/soft.shtml WMM] computer models available for download (registration not necessary). They also have several [http://www.ngdc.noaa.gov/geomag/geom_util/utilities_home.shtml utility programs]. | ||
The USGS has a [http://pubs.usgs.gov/of/1997/ofr-97-0725/ collection of software], however it dates of 1997. This Open-File Report (97-725) is named '''Potential-Field Geophysical Software for the PC, version 2.2''' and supersedes [http://pubs.usgs.gov/of/1995/ofr-95-0077/of-95-77.html Open-File Report 95-77], from 1995, '''A bibliography of some geophysical computer programs, databases, and maps from the U.S. Geological Survey, 1971-1994'''. | The USGS has a [http://pubs.usgs.gov/of/1997/ofr-97-0725/ collection of software], however it dates of 1997. This Open-File Report (97-725) is named '''Potential-Field Geophysical Software for the PC, version 2.2''' and supersedes [http://pubs.usgs.gov/of/1995/ofr-95-0077/of-95-77.html Open-File Report 95-77], from 1995, '''A bibliography of some geophysical computer programs, databases, and maps from the U.S. Geological Survey, 1971-1994'''. | ||
The [http://www.on.br Brazilian National Observatory] (ON) also had its own geomagnetic model, called ELEMAG, which agrees with the IGRF, but is calibrated to work only in Brazil. I ([[User:Pmarc|Pmarc]]) however, have not been able to find it on their website, on the other hand, [http://www.google.com/search?q=Declinação+elemag+on Google] was able to find some versions online. | The [http://www.on.br Brazilian National Observatory] (ON) also had its own geomagnetic model, called ELEMAG, which agrees with the IGRF, but is calibrated to work only in Brazil. I ([[User:Pmarc|Pmarc]]) however, have not been able to find it on their website, on the other hand, [http://www.google.com/search?q=Declinação+elemag+on Google] was able to find some versions online. | ||
Revision as of 01:13, 28 August 2008
Here is a gathering of ideas, in order to produce geomagnetic modules or scripts to GRASS
Interesting Links
The California Soil Resource Lab has some quite interesting information for production of a Detailed Magnetic Declination map.
They also cite the NOAA website, which has IGRF and WMM computer models available for download (registration not necessary). They also have several utility programs.
The USGS has a collection of software, however it dates of 1997. This Open-File Report (97-725) is named Potential-Field Geophysical Software for the PC, version 2.2 and supersedes Open-File Report 95-77, from 1995, A bibliography of some geophysical computer programs, databases, and maps from the U.S. Geological Survey, 1971-1994.
The Brazilian National Observatory (ON) also had its own geomagnetic model, called ELEMAG, which agrees with the IGRF, but is calibrated to work only in Brazil. I (Pmarc) however, have not been able to find it on their website, on the other hand, Google was able to find some versions online.
Wishlist
- Module capable of computing the magnetic field (all 7 components) over a location, for a given date or range of dates. It seems to me (Pmarc) that the most appropriate output would be a vector map. The starting point could be the IGRF model provided by NOAA (link above)