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GPS radio occultation with CHAMP: An application for climate research

Authors
/persons/resource/tschmidt

Schmidt,  Torsten
1.1 GPS/GALILEO Earth Observation, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/wickert

Wickert,  Jens
1.1 GPS/GALILEO Earth Observation, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/gbeyerle

Beyerle,  Georg
1.1 GPS/GALILEO Earth Observation, 1.0 Geodesy and Remote Sensing, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

Reigber,  C.
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Citation

Schmidt, T., Wickert, J., Beyerle, G., Reigber, C. (2004): GPS radio occultation with CHAMP: An application for climate research, Joint CHAMP/GRACE Science Meeting (Potsdam 2004).


https://gfzpublic.gfz-potsdam.de/pubman/item/item_231939
Abstract
The availability of Global Positioning System (GPS) radio signals has introduced a promising remote sensing technique for the Earth's atmosphere. GPS based radio occultation (RO) exploits these signals received onboard a Low Earth Orbiting (LEO) satellite for atmospheric limb sounding. Refractivity and temperature profiles with high accuracy and vertical resolution can be derived from these measurements. The GPS RO technique requires no calibration, is not affected by clouds, aerosols or precipitation, and the occultations are almost uniformly distributed over the globe. CHAMP RO data are available since 2001 with up to 200 high-resolution vertical temperature profiles per day. As an example for global monitoring the structure and temporal and spatial variability of the tropical tropopause are discussed. In the CHAMP RO temperature data clear evidence of the stratospheric quasi-biennial oscillation (QBO) was found.