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《Crustal Deformation and Earthquake》 2002-01
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SATELLITE IN LOW ORBIT(CHAMP,GRACE,GOCE) AND HIGH PRECISION EARTH GRAVITY FIELD:the latest progress of satellite gravity geodesy and its great influence on geoscience

Sun Wenke\;(Institute of Seismology,ToKyo University,Japan)\;  
The latest progress of satellite gravity geodesy and its great influence on geoscience is reriewed in this paper.In order to comprehend the physical structure of the earth's interior,ocean dynamics and the mutual action of continent,glacier and ocean, it is very inportant to improve the available models of earth's gravity field(including accuracy and spatial resolution),on which several international organizations have emphasised for many years.Lately GFZ(GeoForschungsZentrum) of Germeny,NASA(National Aeronautics and Space Adminitration) of The United States and ESA(European Space Agency) of Europe developed the most advanced earth monitoring technique--SST(Satellite to Satellite Tracking),whose major characteristics are continuously tracing the satellites in low orbit launched at late by use of available GPS and the precision observation for earth's gravity field from the satellites in low orbit.There are 3 satellites launched or will be launched,CHAMP(Challenging Mini Satellite Payload for Geophysical Research and Application) launched in 2000,GRACE(Gravity Recovery and Climate Experiment) is scheduled to be launched in 2002 and GOCE(Gravity Field and Steady state Ocean Circulation Explorer) in 2004,they are all called as gravity satellites.The main objectives of satellite carrying SST equipment are to obtain the gravity field and geoid model of the earth, to strenthen the understanding of earth's inner structure and to provide a better reference for the study of ocean and atmosphere.The above 3 gravity satellites work in obviously different spectrums and apply in different scientific fields with a little overlap,hence they are mutually complementary and widely applied in the geo science.It is certain that these satellites,like GPS,will bring the revolutionary change to solid geophysics,oceangraphy,geodesy and so forth.
【CateGory Index】: P223.7
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