10.5880/GFZ.1.1.2021.006 eng dataset GFZ German Research Centre for Geosciences datapub@gfz-potsdam.de http://www.gfz-potsdam.de Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences pointOfContact 2021-10-22 urn:ogc:def:crs:EPSG:4326 GFZ Global Ionosphere Maps 2021-10-22 revision doi:10.5880/GFZ.1.1.2021.006 Brack, Andreas GFZ German Research Centre for Geosciences, Potsdam, Germany author Männel, Benjamin GFZ German Research Centre for Geosciences, Potsdam, Germany author Bradke, Markus GFZ German Research Centre for Geosciences, Potsdam, Germany author Brandt, Andre GFZ German Research Centre for Geosciences, Potsdam, Germany author Nischan, Thomas GFZ German Research Centre for Geosciences, Potsdam, Germany author GFZ German Research Centre for Geosciences, Potsdam, Germany GFZ German Research Centre for Geosciences, Potsdam, Germany originator GFZ Data Services publisher This data publication contains global maps of the vertical total electron content (VTEC) of the Earth's ionosphere. They are computed at GFZ from ground GNSS data and provided on an operational basis. The dataset covers the period since the beginning of 2000 and is published in daily files. Brack, Andreas GFZ German Research Centre for Geosciences, Potsdam, Germany brack@gfz-potsdam.de pointOfContact Ionosphere Total electron content (TEC) Atmosphere GPS GLONASS Galileo atmosphere > atmospheric structure > ionosphere GEMET - INSPIRE themes, version 1.0 publication Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > Galileo Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > GLONASS Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > GNSS Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > GPS GCMD Instruments publication EARTH SCIENCE > ATMOSPHERE EARTH SCIENCE > SUN-EARTH INTERACTIONS > SOLAR ENERGETIC PARTICLE PROPERTIES > TOTAL ELECTRON CONTENT NASA/GCMD Earth Science Keywords publication CC BY 4.0 CC BY 4.0 10.1029/2021RS007337 DOI IsDocumentedBy https://isdc.gfz-potsdam.de/gnss-products/ URL References 10.5880/GFZ.1.1.2020.001 DOI References http://acc.igs.org/repro3/Long_Product_Filenames_v1.0.pdf URL References https://files.igs.org/pub/data/format/ionex1.pdf URL References eng geoscientificInformation -180 180 -90 90 http://doi.org/10.5880/GFZ.1.1.2021.006 WWW:LINK-1.0-http--link Data Access - DOI Data Access - DOI information Based on a network of around 250 GNSS stations of the tracking network of the International GNSS Service (IGS), the GFZ generates global VTEC solutions using the latest development version of the EPOS.P8 Software. Observation data from GPS, GLONASS (from 2012), and Galileo (from 2014) satellites are used. The processing is based on a rigorous least-squares approach using uncombined code and phase observations, and does not entail leveling techniques. A single-layer ionospheric model with a spherical harmonic VTEC representation is applied. VTEC values are provided with a temporal resolution of 2 hours and a spatial resolution of 2.5 degrees in latitude and 5 degrees in longitude. The processing is described in detail in Brack et al. (2021). The solution series contains daily files (<YYYY> and <DDD> refer to the year and day of year) in the ionex data format (https://files.igs.org/pub/data/format/ionex1.pdf): - GFZ0OPSRAP_<YYYY><DDD>0000_01D_02H_ION.IOX.gz: rapid solution published with a delay of one day - GFZ0OPSFIN_<YYYY><DDD>0000_01D_02H_ION.IOX.gz: final solution containing the middle day of a combination of the rapid solutions of three consecutive days The file naming follows the IGS Long Product Filename (http://acc.igs.org/repro3/Long_Product_Filenames_v1.0.pdf). All files are .gz compressed.