10.5880/GFZ.2.3.2021.003 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 2021-02-18 urn:ogc:def:crs:EPSG:4326 GRACE Electron Density derived from the K-Band Ranging System (KBR) 2021-02-18 revision 2015-04-30 creation doi:10.5880/GFZ.2.3.2021.003 Xiong, Chao GFZ German Research Centre for Geosciences, Potsdam, Germany author Lühr, Hermann GFZ German Research Centre for Geosciences, Potsdam, Germany author Stolle, Claudia GFZ German Research Centre for Geosciences, Potsdam, Germany author GFZ Data Services publisher The GRACE (Gravity Recovery and Climate Experiment) satellites, which comprises two spacecraft, GRACE-A and GRACE-B, were launched on 17 March 2002 into a near-circular, polar (inclination = 89◦ ) orbit with an initial altitude of about 490 km. The two satellites follow each other at a distance of about 200 km. The primary objective of the GRACE mission is to provide global high-resolution models of the Earth’s gravity field. The instruments supporting our study are the K-Band Ranging System (KBR), and the GPS Space Receiver (GPS). The K-Band Ranging System (KBR) system is the key science instrument of GRACE which measures the dual one-way range change between both satellites with a precision of about 1 μm per second. From the KBR1B data we can get the change of Total Electron Content (TEC). In addition the GPS Navigation Data (GNV1B) can provide us the position of the two satellites. From these data we can derive the average electron density between the two satellites. The data are stored as daily ASCII files using the file naming convention 'KBRNE_YYYY_MM_DD.dat'. Headers in each data file contain a short name for each column. A more detailed description is provided in the readme file. Stolle, Claudia GFZ German Research Centre for Geosciences, Potsdam, Germany claudia.stolle@gfz-potsdam.de https://www.gfz-potsdam.de/ informtion pointOfContact Michaelis, Ingo GFZ German Research Centre for Geosciences, Potsdam, Germany ingo.michaelis@gfz-potsdam.de https://www.gfz-potsdam.de/ informtion pointOfContact atmosphere > atmospheric structure > ionosphere GEMET - INSPIRE themes, version 1.0 publication Earth Observation Satellites > NASA Earth System Science Pathfinder > GRACE GCMD Platforms publication Earth Remote Sensing Instruments > Active Remote Sensing > Altimeters > Radar Altimeters > KBR Earth Remote Sensing Instruments > Passive Remote Sensing > Positioning/Navigation > GPS > GPS RECEIVERS GCMD Instruments publication CC BY 4.0 CC BY 4.0 10.5194/angeo-28-1647-2010 DOI IsSupplementTo 10.1016/j.asr.2014.07.022 DOI IsReferencedBy eng geoscientificInformation -180 180 -89 89 2002-04-04T10:55:27 2015-04-30 http://doi.org/10.5880/GFZ.2.3.2021.003 WWW:LINK-1.0-http--link Data Access - DOI Data Access - DOI information