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GNSS-Radiookkultation : globale atmosphärische Klimauntersuchungen mit Signalen von Navigationssatelliten

Wickert, J., Schmidt, T., Heise, S., Arras, C., Beyerle, G., Zus, F. (2012): GNSS-Radiookkultation: globale atmosphärische Klimauntersuchungen mit Signalen von Navigationssatelliten. - System Erde, 2, 1, pp. 32—37.
DOI: http://doi.org/10.2312/GFZ.syserde.02.01.6



http://gfzpublic.gfz-potsdam.de/pubman/item/escidoc:65126
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GFZ_syserde.02.01.6.pdf
(Publisher version), 530KB

Authors
http://gfzpublic.gfz-potsdam.de/cone/persons/resource/wickert

Wickert ,  Jens
System Erde : GFZ Journal Vol. 2, Issue 1 (2012), System Erde : GFZ Journal 2012, Deutsches GeoForschungsZentrum;
1.1 GPS/GALILEO Earth Observation, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

http://gfzpublic.gfz-potsdam.de/cone/persons/resource/tschmidt

Schmidt ,  Torsten
System Erde : GFZ Journal Vol. 2, Issue 1 (2012), System Erde : GFZ Journal 2012, Deutsches GeoForschungsZentrum;
1.1 GPS/GALILEO Earth Observation, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

http://gfzpublic.gfz-potsdam.de/cone/persons/resource/heise

Heise ,  Stefan
System Erde : GFZ Journal Vol. 2, Issue 1 (2012), System Erde : GFZ Journal 2012, Deutsches GeoForschungsZentrum;
1.1 GPS/GALILEO Earth Observation, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

http://gfzpublic.gfz-potsdam.de/cone/persons/resource/viehweg

Arras ,  Christina
System Erde : GFZ Journal Vol. 2, Issue 1 (2012), System Erde : GFZ Journal 2012, Deutsches GeoForschungsZentrum;
1.1 GPS/GALILEO Earth Observation, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

http://gfzpublic.gfz-potsdam.de/cone/persons/resource/gbeyerle

Beyerle ,  Georg
System Erde : GFZ Journal Vol. 2, Issue 1 (2012), System Erde : GFZ Journal 2012, Deutsches GeoForschungsZentrum;
1.1 GPS/GALILEO Earth Observation, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

http://gfzpublic.gfz-potsdam.de/cone/persons/resource/zusflo

Zus ,  Florian
System Erde : GFZ Journal Vol. 2, Issue 1 (2012), System Erde : GFZ Journal 2012, Deutsches GeoForschungsZentrum;
1.1 GPS/GALILEO Earth Observation, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Abstract
Understanding and predicting of atmospheric temperature and water vapor variations is a key issue for characterizing global change. To precisely determine the current and future variations on a global scale, accurate atmospheric observations with satellites are indispensable. We introduce an innovative and very precise satellite based atmospheric observation technique, which became operational during the recent years, pioneered also by the work of GFZ technicians and scientists: GNSS (Global Navigation Satellite System) Radio Occultation (RO). The technique is based on the influence of the Earth’s atmosphere on the propagation of navigation signals (L-Band, 1.2 and 1.5 GHz). A key parameter for this influence is the bending angle of the signal path from the transmitting navigation to the receiving Low Earth Orbiting (LEO) satellite, which depends on atmospheric temperature and water vapor. The GNSS RO method is currently applied aboard several LEO satellites, as GRACE, TerraSAR-X, TanDEM-X, COSMIC and Metop. We also present recent scientific GFZ results related to the characterization of global atmospheric variations using the world-wide unique long-term GNSS RO data set from the GFZ geoscience satellite CHAMP (2000-2010). Hereby, tropopause temperature and altitude properties, precisely derived from the GNSS RO data, are also used to reveal even very small variations of the global atmosphere.