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Calculate magnetic field at a given location and time according to the World Magnetic Model (WMM). Both the main field and secular variation components are returned. This functionality is useful for physicists and geophysicists who need orthogonal components from WMM. Currently, this package supports annualized time inputs between 2000 and 2025. If desired, users can specify which WMM version to use, e.g., the original WMM2015 release or the recent out-of-cycle WMM2015 release. Methods used to implement WMM, including the Gauss coefficients for each release, are described in the following publications: Chulliat et al (2020) <doi:10.25923/ytk1-yx35>, Chulliat et al (2019) <doi:10.25921/xhr3-0t19>, Chulliat et al (2015) <doi:10.7289/V5TB14V7>, Maus et al (2010) <https://www.ngdc.noaa.gov/geomag/WMM/data/WMMReports/WMM2010_Report.pdf>, McLean et al (2004) <https://www.ngdc.noaa.gov/geomag/WMM/data/WMMReports/TRWMM_2005.pdf>, and Macmillian et al (2000) <https://www.ngdc.noaa.gov/geomag/WMM/data/WMMReports/wmm2000.pdf>.
| Version: | 1.1.1 |
| Depends: | R (≥ 2.10) |
| Suggests: | testthat (≥ 2.0.1), data.table (≥ 1.12.2) |
| Published: | 2021-09-06 |
| DOI: | 10.32614/CRAN.package.wmm |
| Author: | Will Frierson [aut, cre] |
| Maintainer: | Will Frierson <will.frierson at gmail.com> |
| BugReports: | https://github.com/wfrierson/wmm/issues |
| License: | MIT + file LICENSE |
| URL: | https://github.com/wfrierson/wmm |
| NeedsCompilation: | no |
| Language: | en-US |
| Materials: | README NEWS |
| CRAN checks: | wmm results |
| Reference manual: | wmm.pdf |
| Package source: | wmm_1.1.1.tar.gz |
| Windows binaries: | r-devel: wmm_1.1.1.zip, r-release: wmm_1.1.1.zip, r-oldrel: wmm_1.1.1.zip |
| macOS binaries: | r-release (arm64): wmm_1.1.1.tgz, r-oldrel (arm64): wmm_1.1.1.tgz, r-release (x86_64): wmm_1.1.1.tgz, r-oldrel (x86_64): wmm_1.1.1.tgz |
| Old sources: | wmm archive |
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These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.