Computer Science – Performance
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....3440p&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #3440
Computer Science
Performance
Scientific paper
The science objectives of the Rosetta Radio Science Investigations (RSI) experiment address fundamental aspects of cometary physics such as the mass and bulk density of the comet nucleus, its gravity field, nongravitational forces, its size and shape, the internal structure, the composition and roughness of the nucleus surface, the abundance of large dust grains, the plasma content in the coma and the combined dust and gas mass flux. The mass and density of the asteroids Siwa and Otawara shall be determined during the respective flybys. The RSI experiment will use the spacecrafts radio carrier frequencies at X-band (8.4 GHz) and S-band (2.3 GHz) in order to measure slight changes in the relative velocity between the spacecraft and the ground station on Earth (Doppler effect) induced by the perturbing forces on the spacecraft during asteroid flyby or in orbit about the nucleus, and the dispersive carrier phase shift due to the propagation of the radio waves in plasmas. If available, a first assessment of the experiment performance obtained during the spacecraft commissioning will be given.
Pätzold Martin
Rsi Team
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