{"action":"create","ckan_id":null,"date_created":"Sat, 04 Apr 2026 12:49:31 GMT","date_finished":null,"harvest_job_id":"c419fa6f-8787-4c1a-be1a-802eece558c6","harvest_source_id":"c18ea28e-85c8-4c7c-b96a-f6031d21fcaa","id":"1bd5ef76-2e74-478c-b7d2-df1c9d4e9541","identifier":"https://data.noaa.gov/waf/NOAA/NESDIS/NGDC/MGG/Geophysical_Models/iso/xml/EMAG2_V3.xml","parent_identifier":null,"source_hash":"cab51d1bf78fc4ffa5daf56864c14ca1eff50fa577d4ebe6d4fc37676fdc0263","source_raw":"\r\n \r\n gov.noaa.ngdc.mgg.geophysical_models:EMAG2_V3\r\n \r\n \r\n dataset\r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n \r\n \r\n \r\n \r\n ncei.info@noaa.gov\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/contact\r\n \r\n \r\n NCEI Contact Information\r\n \r\n \r\n Information for contacts at NCEI.\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n pointOfContact\r\n \r\n \r\n \r\n \r\n 2020-05-14\r\n \r\n \r\n ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data\r\n \r\n \r\n ISO 19115-2:2009(E)\r\n \r\n \r\n \r\n \r\n 2\r\n \r\n \r\n \r\n \r\n row\r\n \r\n \r\n 10801\r\n \r\n \r\n .0333\r\n \r\n \r\n \r\n \r\n \r\n \r\n column\r\n \r\n \r\n 5401\r\n \r\n \r\n .0333\r\n \r\n \r\n \r\n \r\n area\r\n \r\n \r\n true\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n World Geodetic System 1984\r\n \r\n \r\n WGS 84\r\n \r\n \r\n \r\n \r\n 2007-08-27\r\n \r\n \r\n revision\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://epsg.org/crs_4326/WGS-84.html\r\n \r\n \r\n WGS 84\r\n \r\n \r\n GML of World Geodetic System 1984 coordinate reference system.\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n resourceProvider\r\n \r\n \r\n \r\n \r\n \r\n \r\n European Petroleum Survey Group\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://epsg.org/home.html\r\n \r\n \r\n European Petroleum Survey Group Geodetic Parameter Registry\r\n \r\n \r\n Registry that accesses the EPSG Geodetic Parameter Dataset, which is a structured dataset of Coordinate Reference Systems and Coordinate Transformations.\r\n \r\n \r\n search\r\n \r\n \r\n \r\n \r\n \r\n \r\n publisher\r\n \r\n \r\n \r\n \r\n \r\n \r\n urn:ogc:def:crs:EPSG::4326\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n EMAG2v3: Earth Magnetic Anomaly Grid (2-arc-minute resolution)\r\n \r\n \r\n \r\n \r\n 2017-05-30\r\n \r\n \r\n publication\r\n \r\n \r\n \r\n \r\n Version 3\r\n \r\n \r\n 2017-05-30\r\n \r\n \r\n \r\n \r\n \r\n \r\n International DOI Foundation (IDF)\r\n \r\n \r\n \r\n \r\n \r\n doi:10.7289/V5H70CVX\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n \r\n \r\n \r\n NCEI Metadata ID: gov.noaa.ngdc.mgg.geophysical_models:EMAG2_V3\r\n \r\n \r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n publisher\r\n \r\n \r\n \r\n \r\n \r\n \r\n NCEI Geomagnetic Modeling Team\r\n \r\n \r\n originator\r\n \r\n \r\n \r\n \r\n \r\n \r\n Brian Meyer\r\n \r\n \r\n author\r\n \r\n \r\n \r\n \r\n \r\n \r\n Richard Saltus\r\n \r\n \r\n author\r\n \r\n \r\n \r\n \r\n \r\n \r\n Arnaud Chulliat\r\n \r\n \r\n author\r\n \r\n \r\n \r\n \r\n mapDigital\r\n \r\n \r\n \r\n \r\n EMAG2v3 is a global Earth Magnetic Anomaly Grid compiled from satellite, ship, and airborne magnetic measurements. It is a significant update of the previous release of the Earth Magnetic Anomaly Grid. The resolution remains 2 arc-minutes, and the altitude of 4 km above the geoid is still supported, but an additional product, a grid that is observed at sea-level over oceanic regions, has been produced. New additions grid and track line data have been included, both over land and the oceans. Wherever available, the original shipborne and airborne data were used instead of precompiled oceanic magnetic grids. Interpolation between sparse track lines in the oceans was improved by using a kriging algorithm, which specializes in heterogeneous data distribution gridding, in order to create a compilation as true to the observed data as possible, and avoid using a priori information. The longest wavelengths (>300 km) were replaced with the latests satellite lithosphere magnetic field model, MF7.\r\n \r\n \r\n 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.\r\n \r\n \r\n completed\r\n \r\n \r\n historicalArchive\r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n \r\n \r\n \r\n \r\n ncei.info@noaa.gov\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/contact\r\n \r\n \r\n NCEI Contact Information\r\n \r\n \r\n Information for contacts at NCEI.\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n pointOfContact\r\n \r\n \r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n NCEI Geomagnetic Modeling Team\r\n \r\n \r\n \r\n \r\n \r\n \r\n geomag.models@noaa.gov\r\n \r\n \r\n \r\n \r\n \r\n \r\n pointOfContact\r\n \r\n \r\n \r\n \r\n \r\n \r\n asNeeded\r\n \r\n \r\n \r\n \r\n \r\n \r\n http://www.ngdc.noaa.gov/geomag/image/EMAG2_V3_UpCont_WestCoastUS.png\r\n \r\n \r\n EMAG2v3 showing the west coast of the United States and Canada. The stripes are magnetic lineations due to sea-floor spreading.\r\n \r\n \r\n png\r\n \r\n \r\n \r\n \r\n \r\n \r\n Earth Science > Solid Earth > Geomagnetism > Magnetic Field\r\n \r\n \r\n Earth Science > Solid Earth > Geomagnetism > Magnetic Intensity\r\n \r\n \r\n Earth Science > Solid Earth > Geomagnetism > Magnetic Anomalies\r\n \r\n \r\n theme\r\n \r\n \r\n \r\n \r\n Global Change Master Directory (GCMD) Science Keywords\r\n \r\n \r\n \r\n \r\n 2024\r\n \r\n \r\n revision\r\n \r\n \r\n \r\n \r\n 19\r\n \r\n \r\n \r\n \r\n Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords\r\n \r\n \r\n GCMD Keyword Forum Page\r\n \r\n \r\n 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\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n custodian\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n Geographic Region > Global\r\n \r\n \r\n place\r\n \r\n \r\n \r\n \r\n Global Change Master Directory (GCMD) Location Keywords\r\n \r\n \r\n \r\n \r\n 2024\r\n \r\n \r\n revision\r\n \r\n \r\n \r\n \r\n 19\r\n \r\n \r\n \r\n \r\n Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords\r\n \r\n \r\n GCMD Keyword Forum Page\r\n \r\n \r\n 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\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n custodian\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce\r\n \r\n \r\n DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce\r\n \r\n \r\n dataCentre\r\n \r\n \r\n \r\n \r\n Global Change Master Directory (GCMD) Data Center Keywords\r\n \r\n \r\n \r\n \r\n 2020-01-09\r\n \r\n \r\n publication\r\n \r\n \r\n \r\n \r\n 9.1\r\n \r\n \r\n \r\n \r\n Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA)\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords\r\n \r\n \r\n GCMD Keyword Forum Page\r\n \r\n \r\n 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\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n custodian\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n otherRestrictions\r\n \r\n \r\n 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.\r\n \r\n \r\n \r\n \r\n \r\n \r\n otherRestrictions\r\n \r\n \r\n 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.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Produced by the NOAA National Centers for Environmental Information. Not subject to copyright protection within the United States.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Not to be used for navigation. Although these data are of high quality and useful for planning and modeling purposes, they are not suitable for navigation. For navigation, please refer to the NOS nautical chart series.\r\n \r\n \r\n \r\n \r\n \r\n \r\n otherRestrictions\r\n \r\n \r\n Cite as: Brian Meyer; Richard Saltus; and Arnaud Chulliat. 2017: EMAG2v3: Earth Magnetic Anomaly Grid (2-arc-minute resolution). Version 3. NOAA National Centers for Environmental Information. https://doi.org/10.7289/V5H70CVX. Accessed [date].\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n Derivation and Error Analysis of the Earth Magnetic Anomaly Grid at 2 Arc-Minute Resolution Version 3 (EMAG2v3)\r\n \r\n \r\n \r\n \r\n 2017-12-19\r\n \r\n \r\n publication\r\n \r\n \r\n \r\n \r\n \r\n \r\n doi:10.1002/2017GC007280\r\n \r\n \r\n \r\n \r\n \r\n \r\n Geochemistry, Geophysics, Geosystems\r\n \r\n \r\n publisher\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://doi.org/10.1002/2017gc007280\r\n \r\n \r\n Derivation and Error Analysis of the Earth Magnetic Anomaly Grid at 2 Arc-Minute Resolution Version 3 (EMAG2v3)\r\n \r\n \r\n A science paper about the construction and evaluation of the Earth Magnetic Anomaly Grid 2 Arc-Minute Resolution Version 3\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n crossReference\r\n \r\n \r\n sciencePaper\r\n \r\n \r\n \r\n \r\n grid\r\n \r\n \r\n eng; USA\r\n \r\n \r\n geoscientificInformation\r\n \r\n \r\n \r\n \r\n \r\n \r\n 0\r\n \r\n \r\n 360\r\n \r\n \r\n -90\r\n \r\n \r\n 90\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n 1946-01-01\r\n 2014-02-20\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n Grid Cell\r\n \r\n \r\n modelResult\r\n \r\n \r\n \r\n \r\n Magnetic Anomaly\r\n \r\n \r\n 8632\r\n \r\n \r\n -3380\r\n \r\n \r\n \r\n nanoTesla\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n Empty Grid Cell\r\n \r\n \r\n Representation of grid cell with no measurement value.\r\n \r\n \r\n 99999\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n \r\n \r\n \r\n \r\n ncei.info@noaa.gov\r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/contact\r\n \r\n \r\n NCEI Contact Information\r\n \r\n \r\n Information for contacts at NCEI.\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n distributor\r\n \r\n \r\n \r\n \r\n \r\n \r\n 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.\r\n \r\n \r\n Contact NCEI for other distribution options and instructions.\r\n \r\n \r\n \r\n \r\n \r\n \r\n XYZ/Zip\r\n \r\n \r\n Version 3\r\n \r\n \r\n Comma delimited ASCII grid that contains i and j grid indicies, latitude and longitude cell centered location information, magnetic anomalies at a consistent 4km elevation, magnetic anomalies at sea level over oceanic regions, anomaly source grid code, and an error estimate for each cell.\r\n \r\n \r\n \r\n \r\n \r\n \r\n ASCII TXT\r\n \r\n \r\n Version 3\r\n \r\n \r\n An ASCII text file which describes the format of the CSV data grid.\r\n \r\n \r\n \r\n \r\n \r\n \r\n PNG\r\n \r\n \r\n Version 3\r\n \r\n \r\n Full Resolution Map of EMAG2v3 as a poster at a consistent 4km altitude\r\n \r\n \r\n \r\n \r\n \r\n \r\n PNG\r\n \r\n \r\n Version 3\r\n \r\n \r\n Full Resolution Map of EMAG2v3 as a poster at sea level over oceanic regions\r\n \r\n \r\n \r\n \r\n \r\n \r\n KMZ\r\n \r\n \r\n Version 3\r\n \r\n \r\n Plugin for Google Earth of EMAG2v3 as a poster at a consistent 4km altitude with data gaps filled with MF7. Requires installation of Google Earth.\r\n \r\n \r\n \r\n \r\n \r\n \r\n GIS TIFF\r\n \r\n \r\n Version 3\r\n \r\n \r\n A georeferenced TIFF (GeoTIFF) for EMAG2v3, where the altitude is 4km altitude above continental regions and sea level over oceanic regions, with a resolution of 2 arc-minutes, which can be opened by ESRI ArcGIS or any other GIS application. The values (nT) are stored as 32-bit floating point.\r\n \r\n \r\n \r\n \r\n \r\n \r\n PNG\r\n \r\n \r\n Version 3\r\n \r\n \r\n Full Resolution Map of EMAG2v3 codes to designate which grid is primarily responsible for the anomaly value for each cell\r\n \r\n \r\n \r\n \r\n \r\n \r\n PNG\r\n \r\n \r\n Version 3\r\n \r\n \r\n Full Resolution Map of EMAG2v3 estimates of the error in nanoTesla for each cell\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ncei.noaa.gov/metadata/geoportal/rest/metadata/item/gov.noaa.ngdc.mgg.geophysical_models:EMAG2_V3/html\r\n \r\n \r\n HTTPS\r\n \r\n \r\n Metadata Landing Page\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n http://www.ngdc.noaa.gov/geomag/emag2.html\r\n \r\n \r\n HTTPS\r\n \r\n \r\n Home Page\r\n \r\n \r\n information\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ngdc.noaa.gov/geomag/data/EMAG2/EMAG2_V3_20170530/EMAG2_V3_20170530.zip\r\n \r\n \r\n EMAG2v3 ASCII CSV data file\r\n \r\n \r\n Zip file containing the comma delimited ASCII grid that contains i and j grid indicies, latitude and longitude cell centered location information, magnetic anomalies at a consistent 4km elevation, sea level over oceanic regions, anomaly source grid code, and an error estimate for each cell.\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ngdc.noaa.gov/geomag/data/EMAG2/EMAG2_V3_20170530/EMAG2_readme.txt\r\n \r\n \r\n EMAG2v3 Format Description\r\n \r\n \r\n ASCII text file that contains format description of the EMAG2v3 CSV data file.\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ngdc.noaa.gov/geomag/data/EMAG2/EMAG2_V3_20170530/EMAG2_V3_20170530_UpCont_poster.png\r\n \r\n \r\n EMAG2v3 Full Resolution Map of Upward Continued Anomalies\r\n \r\n \r\n PNG of EMAG2v3 as a poster at a consistent 4km altitude.\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ngdc.noaa.gov/geomag/data/EMAG2/EMAG2_V3_20170530/EMAG2_V3_20170530_SeaLevel_poster.png\r\n \r\n \r\n EMAG2v3 Full Resolution Map of Sea Level Anomalies\r\n \r\n \r\n PNG of EMAG2v3 as a poster at sea level over oceanic regions.\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ngdc.noaa.gov/geomag/data/EMAG2/EMAG2_V3_20170530/EMAG2_V3_20170530_UpCont_MF7fill.kmz\r\n \r\n \r\n Upward Continued Google Earth Image\r\n \r\n \r\n KMZ plugin for Google Earth of EMAG2v3 as a poster at a consistent 4km altitude with data gaps filled with MF7 values. Requires installation of Google Earth.\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ngdc.noaa.gov/geomag/data/EMAG2/EMAG2_V3_20170530/EMAG2_V3_20170530_UpCont.tif\r\n \r\n \r\n Upward Continued GIS TIFF\r\n \r\n \r\n A georeferenced TIFF (GeoTIFF) for EMAG2v3, where the altitude is at a consistent 4km altitude, with a resolution of 2 arc-minutes, which can be opened by ESRI ArcGIS or any other GIS application. The values (nT) are stored as 32-bit floating point.\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ngdc.noaa.gov/geomag/data/EMAG2/EMAG2_V3_20170530/EMAG2_V3_20170530_Sealevel.tif\r\n \r\n \r\n Sea Level GIS TIFF\r\n \r\n \r\n A georeferenced TIFF (GeoTIFF) for EMAG2v3, where the altitude is at sea level over oceanic regions, with a resolution of 2 arc-minutes, which can be opened by ESRI ArcGIS or any other GIS application. The values (nT) are stored as 32-bit floating point.\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ngdc.noaa.gov/geomag/data/EMAG2/EMAG2_V3_20170530/EMAG2_V3_20170530_Code_map.png\r\n \r\n \r\n Map of Source Grid Codes\r\n \r\n \r\n PNG of EMAG2v3 codes to designate which grid is primarily responsible for the anomaly value for each cell.\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n https://www.ngdc.noaa.gov/geomag/data/EMAG2/EMAG2_V3_20170530/EMAG2_V3_20170530_Error_map.png\r\n \r\n \r\n Map of Estimated Error Values\r\n \r\n \r\n PNG of EMAG2v3 estimates of the error in nanoTesla for each cell.\r\n \r\n \r\n download\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n repository\r\n \r\n \r\n \r\n \r\n NOAA National Centers for Environmental Information\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n 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.\r\n \r\n \r\n 2015-04-22T00:00:00\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n model\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n Trackline data selection. Data needed to report date/time of collection, total observed magnetic field, collected during time where kp < 6o.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Processing steps were carried out collectively by the developers of the model.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Geosoft Oasis Montaj\r\n \r\n \r\n \r\n \r\n 2015-10-08\r\n \r\n \r\n revision\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n From all original ship and airborne measurements: subtracted main and external fields given by the Comprehensive Model 4(Sabaka et al., 2004)\r\n \r\n \r\n \r\n \r\n \r\n \r\n Processing steps were carried out collectively by the developers of the model.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Geosoft Oasis Montaj\r\n \r\n \r\n \r\n \r\n 2015-10-08\r\n \r\n \r\n revision\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n Airborne data downward continued to sea-level\r\n \r\n \r\n \r\n \r\n \r\n \r\n Processing steps were carried out collectively by the developers of the model.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Geosoft Oasis Montaj\r\n \r\n \r\n \r\n \r\n 2015-10-08\r\n \r\n \r\n revision\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n Gridded trackline data using a krigging algorithm. Smoothing was applied where necessary.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Processing steps were carried out collectively by the developers of the model.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Geosoft Oasis Montaj\r\n \r\n \r\n \r\n \r\n 2015-10-08\r\n \r\n \r\n revision\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n Precompiled grids had wavelengths greather than 300km replaced with values from MF7.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Processing steps were carried out collectively by the developers of the model.\r\n \r\n \r\n \r\n \r\n \r\n \r\n Geosoft Oasis Montaj\r\n \r\n \r\n \r\n \r\n 2015-10-08\r\n \r\n \r\n revision\r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n \r\n asNeeded\r\n \r\n \r\n Modified for compliance to NCEI Template v1.2.\r\n \r\n \r\n \r\n","source_transform":null,"status":"error"}