aef970c4-12fe-4137-b7ea-1eaa7d26a182 Dataseries German Aerospace Center (DLR) geoservice@dlr.de 2024-06-20T14:12:06 ISO 19115-1:2014/19139 1.0 WGS 84 (EPSG:4326) EPSG 7.4 SWACI - Total Electron Content (TEC) Maps 2015-03-11T00:00:00 https://geoservice.dlr.de/catalogue/srv/metadata/aef970c4-12fe-4137-b7ea-1eaa7d26a182 SWACI is a research project of DLR supported by the State Government of Mecklenburg-Vorpommern. Radio signals, transmitted by modern communication and navigation systems may be heavily disturbed by space weather hazards. Thus, severe temporal and spatial changes of the electron density in the ionosphere may significantly degrade the signal quality of various radio systems which even may lead to a complete loss of the signal. By providing specific space weather information, in particular now- and forecast of the ionospheric state, the accuracy and reliability of impacted communication and navigation systems shall be improved. The total electron content (TEC) is defined as the integral of the electron density along the ray path between satellite and receiver. Thus, TEC provides the number of electrons per square meter. The most frequently used unit is 1TECU = 1x1016 electrons / m2. TEC is derived from dual frequency code and carrier phase measurements provided by Global Navigation Satellite Systems (GNSS). SWACI uses GPS measurements from various European GNSS networks such as the International GNSS Service (IGS), European Reference Frame (EUREF), Norwegian Mapping Authority (NMA), and ascos distributed by the Federal Agency of Cartography and Geodesy (BKG) Frankfurt. The global TEC maps are mainly created by using data provided by the International GNSS Service Real-Time Pilot Project (IGS-RTPP). To generate TEC maps of vertical TEC, the slant measurements have to be transformed to the vertical. In a first approximation the ionospheric range error in GNSS is proportional to TEC. These TEC maps are used to derive latitudinal and zonal gradients, rate of change of TEC (5 min increments), 27 days medians, hourly forecasts of TEC, and corresponding error estimates. Spatial resolution (latitude x longitude): 2 °x 2° (Europe), 2.5° x 5° (globally) German Aerospace Center (DLR) Henrike.Barkmann@dlr.de German Aerospace Center (DLR) geoservice@dlr.de https://geoservice.dlr.de/catalogue/srv/api/records/aef970c4-12fe-4137-b7ea-1eaa7d26a182/attachments/SWACI.TEC.MAPS_QL.png large_thumbnail png https://geoservice.dlr.de/catalogue/srv/api/records/aef970c4-12fe-4137-b7ea-1eaa7d26a182/attachments/SWACI.TEC.MAPS_QL_s.png thumbnail png Atmospheric conditions GEMET - INSPIRE themes, version 1.0 2008-06-01 https://geoservice.dlr.de/catalogue/srv/eng/thesaurus.download?ref=external.theme.inspire-theme urn:eop:DLR:EOWEB:TEC-Maps SWACI total electron content maps Ionosphere TEC Conditional Limited for public use SWACI License 0 eng climatologyMeteorologyAtmosphere -180 180 -90 90 2005-01-24T00:00:00 2009-01-16T00:00:00 https://impc.dlr.de/products/ WWW:LINK-1.0-http--link Ionosphere Monitoring and Prediction Center Homepage Conformity_001 INSPIRE Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 See the referenced specification true For details see: https://impc.dlr.de/products/ Please refer to https://impc.dlr.de/products/ for more details.