Alternate Views: Get Data, FAQ, ISO Rubric, CSW, HTML, Components, XML Enhanced Magnetic Model 2010 The Enhanced Magnetic Model (EMM) extends to degree and order 720, resolving magnetic anomalies down to 56 km wavelength. The higher resolution of the EMM results in significantly improved pointing accuracy than the World Magnetic Model (WMM), which uses spherical harmonic representation to degree and order 12, resolving the magnetic field at 3000 km wavelength. The EMM model provides the magnetic field vector at any desired location and altitude close to and above the Earth’s surface. Get the Data Access Format(s) Distributor(s) / Contact Info Instructions / Constraints download EMM2010_Sph_Windows_Linux.zip Enhanced Magnetic Model (EMM2010) and software using the spherical harmonic approach for Windows and Linux environments. High CPU requirements (use the faster Mesh software for large number of points), very low RAM requirement (7.5 MB). For use with years 2000 to 2015. download EMM2010_Mesh_Windows_Linux.zip Enhanced Magnetic Model (EMM2010) with software with rapid field calculation using 3D mesh interpolation for Windows and Linux environments. Low CPU requirements, High (1.4 GB) RAM requirement. Only works for years 2010-2015, for 2000-2010 please download the spherical harmonic version above. download EMM2010_Dec-15-09.zip Enhanced Magnetic Model (EMM2010) with software for point and grid calculation. download EMM-720_V3p0.tar.gz Enhanced Magnetic Model with software for rapid field calculation using 3D mesh interpolation. download EMM-720_V3p0_static.cof.gz Enhanced Magnetic Model. Spherical Harmonic Coefficients of the static internal field at 2010.0. download EMM-720_V3p0_secvar.cof.gz Enhanced Magnetic Model. Spherical Harmonic Coefficients of the estimated secular variation 2010-2015. download EMM-06.tar.gz Software for the Enhanced Magnetic Model (EMM-06), including main field, secular variation, NGDC-720-V1 crustal field, magnetospheric field, and induced field. The package includes a simple single-point program and a thread-safe multi-processor application which can be adapted to produce large grids and time series. EMM2010_Sph_Windows_Linux.zip Format version: 4 Format specification: Enhanced Magnetic Model (EMM2010) and software using the spherical harmonic approach for Windows and Linux environments. High CPU requirements (use the faster Mesh software for large number of points), very low RAM requirement (7.5 MB). For use with years 2000 to 2015. EMM2010_Mesh_Windows_Linux.zip Format version: 3 Format specification: Enhanced Magnetic Model (EMM2010) with software with rapid field calculation using 3D mesh interpolation for Windows and Linux environments. Low CPU requirements, High (1.4 GB) RAM requirement. Only works for years 2010-2015, for 2000-2010 please download the spherical harmonic version above. EMM2010_Dec-15-09.zip Format version: 1 Format specification: Enhanced Magnetic Model (EMM2010) with software for point and grid calculation. EMM-720_V3p0.tar.gz Format version: 3 Format specification: Enhanced Magnetic Model with software for rapid field calculation using 3D mesh interpolation. EMM-720_V3p0_static.cof.gz Format version: 3 Format specification: Enhanced Magnetic Model. Spherical Harmonic Coefficients of the static internal field at 2010.0. EMM-720_V3p0_secvar.cof.gz Format version: 3 Format specification: Enhanced Magnetic Model. Spherical Harmonic Coefficients of the estimated secular variation 2010-2015. EMM-06.tar.gz Format version: 3 Format specification: Software for the Enhanced Magnetic Model (EMM-06), including main field, secular variation, NGDC-720-V1 crustal field, magnetospheric field, and induced field. The package includes a simple single-point program and a thread-safe multi-processor application which can be adapted to produce large grids and time series. Fees None Use Limitation Produced by the NOAA National Geophysical Data Center. Not subject to copyright protection within the United States. Legal Constraints