Astronomy and Astrophysics – Astronomy
Scientific paper
May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009iau...261.0904s&link_type=abstract
American Astronomical Society, IAU Symposium #261. Relativity in Fundamental Astronomy: Dynamics, Reference Frames, and Data Ana
Astronomy and Astrophysics
Astronomy
Scientific paper
In deep space exploration missions, one application of spacecraft Doppler tracking is testing gravitation theories and even gravitational waves. Using the radio telescopes in the Chinese VLBI Net (CVN) and the K5/VSSP32 VLBI system of NICT in Japan, we have developed algorithms that extract open-loop Doppler information from the CE-1 radio tracking data. Our latest results indicate that Doppler residuals of three-way Doppler are about 20mHz in 1s integration time, relative to an 2.3GHz carrier, corresponding to a one-way range rate of 1mm. This system has also been used in ESA's Mars Express observation in Nov. 2008. In the forthcoming joint Chinese-Russian Mars mission (YH-1) of 2009, the current software algorithms and hardware performance will be improved, and we will attempt to use the high precision Doppler shift and phase information to test gravitation theories.
Dai Chengda
Jian Nianchuan
Ping Jia-lun
Shang Kun
Shi Xingqiang
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