gov.noaa.ngdc.mgg.geophysical_models:EMM2015 model Magnetic Grid NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact 2020-05-14 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) 2 point true World Geodetic System 1984 WGS 84 2007-08-27 revision https://epsg.org/crs_4326/WGS-84.html WGS 84 GML of World Geodetic System 1984 coordinate reference system. information resourceProvider European Petroleum Survey Group https://epsg.org/home.html 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. search publisher urn:ogc:def:crs:EPSG::4326 Enhanced Magnetic Model 2015 2015-05-15 publication 1 2015-05-15 International DOI Foundation (IDF) doi:10.7289/V56971HV NOAA National Centers for Environmental Information NCEI Metadata ID: gov.noaa.ngdc.mgg.geophysical_models:EMM2015 Chulliat, A. author P. Alken author Nair, A. Woods author S. Maus author NCEI Geomagnetic Modeling Team originator NOAA National Centers for Environmental Information publisher mapDigital 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. Magnetic anomaly maps provide insight into the subsurface structure and composition of the Earth's crust. Over continental areas, magnetic anomalies illuminate geologic, tectonic, and geothermal evolution of crust and lithosphere. In the world's oceans, anomalies trending parallel to the isochrons (lines of equal age) reveal the temporal evolution of oceanic crust. Magnetic maps are widely used in the geological sciences and in resource exploration. completed historicalArchive NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information pointOfContact NOAA National Centers for Environmental Information NCEI Geomagnetic Modeling Team geomag.models@noaa.gov pointOfContact asNeeded https://www.ngdc.noaa.gov/geomag/EMM/img/dec_WMM_EMM.jpg Declination Comparison of WMM and EMM JPG Earth Science > Solid Earth > Geomagnetism > Magnetic Field Earth Science > Solid Earth > Geomagnetism > Magnetic Intensity Earth Science > Solid Earth > Geomagnetism > Magnetic Declination Earth Science > Solid Earth > Geomagnetism > Magnetic Inclination Earth Science > Solid Earth > Geomagnetism > Magnetic Anomalies theme Global Change Master Directory (GCMD) Science Keywords 2024 revision 19 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2020-01-09 publication 9.1 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Geographic Region > Global place Global Change Master Directory (GCMD) Location Keywords 2024 revision 19 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2024. GCMD Keywords, Version 19. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian otherRestrictions Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives. otherRestrictions Use liability: NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose. Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States. otherRestrictions Cite as: Chulliat, A.. P. Alken. Nair, A. Woods. S. Maus. 2015: Enhanced Magnetic Model 2015. 1. NOAA National Centers for Environmental Information. https://doi.org/10.7289/V56971HV. Accessed [date]. grid eng; USA geoscientificInformation -180 180 -90 90 2000-01-01 2019-12-31 Grid Cell modelResult Northerly Intensity 42000 -17000 nanoTesla Easterly Intensity 17000 -18000 nanoTesla Vertical Intensity 61000 -67000 nanoTesla Horizontal Intensity 42000 00 nanoTesla Total Intensity 67000 22000 nanoTesla Inclination 90 -90 degree Declination 90 -90 degree Grid Variation 180 -180 degree NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact NCEI Contact Information Information for contacts at NCEI. information distributor In most cases, electronic downloads of the data are free. However, fees may apply for custom orders, data certifications, copies of analog materials, and data distribution on physical media. Contact NCEI for other distribution options and instructions. EMM2015_Sph_Linux.zip 4 Enhanced Magnetic Model (EMM2015) and software using the spherical harmonic approach for Linux environments. High CPU requirements (use the faster Mesh software for large number of points), very low RAM requirement. For use with years 2000 to 2020. EMM2015_Sph_Windows.zip 4 Enhanced Magnetic Model (EMM2015) and software using the spherical harmonic approach for Windows environments. High CPU requirements (use the faster Mesh software for large number of points), very low RAM requirement. For use with years 2000 to 2020. EMM2015_Sph_Mac.zip 4 Enhanced Magnetic Model (EMM2015) and software using the spherical harmonic approach for Mac environments. High CPU requirements (use the faster Mesh software for large number of points), very low RAM requirement. For use with years 2000 to 2020. https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.geophysical_models:EMM2015/html HTTPS Metadata Landing Page information https://www.ngdc.noaa.gov/geomag/EMM/index.html HTTPS EMM Home Page information https://www.ngdc.noaa.gov/geomag/EMM/EMMSurveySPH.shtml EMM2015_Sph_Linux.zip Enhanced Magnetic Model (EMM2015) and software using the spherical harmonic approach for Linux environments. High CPU requirements (use the faster Mesh software for large number of points), very low RAM requirement. For use with years 2000 to 2020. download https://www.ngdc.noaa.gov/geomag/EMM/EMMSurveySPH.shtml EMM2015_Sph_Windows.zip Enhanced Magnetic Model (EMM2015) and software using the spherical harmonic approach for Windows environments. High CPU requirements (use the faster Mesh software for large number of points), very low RAM requirement. For use with years 2000 to 2020. download https://www.ngdc.noaa.gov/geomag/EMM/EMMSurveySPH.shtml EMM2015_Sph_Mac.zip Enhanced Magnetic Model (EMM2015) and software using the spherical harmonic approach for Mac environments. High CPU requirements (use the faster Mesh software for large number of points), very low RAM requirement. For use with years 2000 to 2020. download repository NOAA National Centers for Environmental Information NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015. 2015-04-22T00:00:00 dataset Measurements during daytime and during periods of strong solar activity are contaminated by external current systems, which are difficult to accurately model. Therefore, only nighttime data during magnetically quiet periods were used in estimating the WMM coefficients. NOAA National Centers for Environmental Information NCEI Geomagnetic Modeling Team geomag.models@noaa.gov pointOfContact Processing steps were carried out collectively by the developers of the model. These developers are listed as authors of the associated paper "The US/UK World Magnetic Model 2015-2020". The US/UK World Magnetic Model for 2015-2020 2009-12-01 publication https://www.ngdc.noaa.gov/geomag/WMM/data/WMM2015/WMM2015_Report.pdf originator Refer to technical report, "The US/UK World Magnetic Model 2015-2020", for description of gridding algorithms. Some contributions to the measured magnetic field, such as the diamagnetic effect of ionospheric plasma (Lühr et al, 2003) or motional induction by tidal ocean currents (Kuvshinov and Olsen, 2005; Maus, 2007), can be accurately modeled and were corrected for prior to the estimation of the WMM main field coefficients. NOAA National Centers for Environmental Information NCEI Geomagnetic Modeling Team geomag.models@noaa.gov pointOfContact Processing steps were carried out collectively by the developers of the model. These developers are listed as authors of the associated paper "The US/UK World Magnetic Model 2015-2020". The US/UK World Magnetic Model for 2015-2020 2009-12-01 publication https://www.ngdc.noaa.gov/geomag/WMM/data/WMM2015/WMM2015_Report.pdf originator Refer to technical report, "The US/UK World Magnetic Model 2015-2020", for description of gridding algorithms. To account for the contributions that have not been removed in the previous steps, an extended set of model parameters is co-estimated with the WMM model coefficients. These account for smaller-wavelength internal magnetic field contributions (spherical harmonic degree larger than 12), second time derivatives (secular acceleration) and contributions from currents external to the Earth. The set of WMM coefficients plus the extended model parameters is called a parent model of the WMM. Two different parent models were produced, reflecting different modeling strategies employed by NGDC for the main field model and BGS for the secular variation model. NOAA National Centers for Environmental Information NCEI Geomagnetic Modeling Team geomag.models@noaa.gov pointOfContact Processing steps were carried out collectively by the developers of the model. These developers are listed as authors of the associated paper "The US/UK World Magnetic Model 2015-2020" which can be found at https://www.ngdc.noaa.gov/geomag/WMM/data/WMM2015/WMM2015_Report.pdf The US/UK World Magnetic Model for 2015-2020 2009-12-01 publication https://www.ngdc.noaa.gov/geomag/WMM/data/WMM2015/WMM2015_Report.pdf originator Refer to technical report, "The US/UK World Magnetic Model 2015-2020", for description of gridding algorithms. Satellite, marine, and aeromagnetic measurements were compiled into an ellipsoidal degree-720 magnetic model of the Earth's lithosphere. This model accurately represents the crustal field down to wavelengths of approximately 56 kilometers. This results in a higher pointing accuracy. NOAA National Centers for Environmental Information NCEI Geomagnetic Modeling Team geomag.models@noaa.gov pointOfContact Processing steps were carried out collectively by the developers of the model. These developers are listed as authors of the associated paper "An ellipsoidal harmonic representation of Earth's lithospheric magnetic field to degree and order 720". An ellipsoidal harmonic representation of Earth's lithospheric magnetic field to degree and order 720 2015-03-25 creation http://geomag.colorado.edu/images/PublicationsPDFs/ngdc720.pdf originator Refer to technical report, "An ellipsoidal harmonic representation of Earth's lithospheric magnetic field to degree and order 720", for description of gridding algorithms. European Space Agency (ESA) Swarm Magnetic Satellite Mission Swarm Satellite Data 2013-11-20 creation European Space Agency http://earth.esa.int/web/guest/swarm/data-access Swarm Earth Explorers Webpage provided details on equipment, mission, as well as results and publications associated with the Swarm mission. information originator -180 180 -90 90 2013-11-24 2015-04-19 Challenging Minisatellite Payload (CHAMP) is a German satellite mission dedicated to improving gravity and magnetic field models of the Earth. CHAMP Satellite Data 2009-12-31 publication GFZ German Research Centre for Geosciences http://op.gfz-potsdam.de/champ/ The CHAMP Mission Webpage provided details on equipment, mission, as well as results and publications associated with the CHAMP mission. information originator -180 180 -90 90 2000-07-15 2010-09-19 The Danish satellite Orsted is a dedicated satellite for geomagnetic field modeling. ORSTED Satellite Data 2009-12-31 publication Danish Meteorological Institute http://www.space.dtu.dk/english/Research/Projects/Oersted The Orsted Satellite Project Webpage provided details on equipment, mission, as well as results and publications associated with the Orsted satellite mission. information originator -180 180 -90 90 1999-02-23 2009-11-30 Magnetics information that is collected at permanent surface magnetic observatories spread across the globe. INTERMAGNET Observatory Data 2009-12-31 publication International Real-time Magnetic Observatory Network http://www.intermagnet.org INTERMAGNET Program Website provides information on participating institutions, observatory locations, and publications associated with the network of observatories. information originator -177.383 172.35 -77.85 82.5 Trackline magnetics observations hosted on GEODAS at the National Centers for Environmental Information (NCEI). GEODAS magnetic data 2013-02-06 revision Brian Meyer NOAA National Centers for Environmental Information 303-497-6125 Brian.Meyer@noaa.gov pointOfContact -180 180 -90 90 asNeeded Modified for compliance to NCEI Template v1.2.