The Phobos project - The system of high accuracy of measuring of range of long-life Phobos lander

Details The Phobos project - The system of high accuracy of measuring of range of long-life Phobos lander The Phobos project - The system of high accuracy of measuring of range of long-life Phobos lander

Oct 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987brig.iafcy....b&link_type=abstract

IAF, International Astronautical Congress, 38th, Brighton, England, Oct. 10-17, 1987. 5 p.

Other

Phase Modulation, Phobos, Rangefinding, Space Exploration, Celestial Mechanics, Hardware, Signal Processing

Scientific paper

The paper describes the design principles of a radio range measurement system for determining the range to a lander on the surface of Phobos. The range measurement accuracy (about 10 m) should make it possible to determine the Mars gravitational constant as well as other celestial-mechanics constants. The measurement technique used relies on pseudorandom sequences with signal remodulation in the onboard-receiver input; the efficiency of carrier phase modulation with an index of 0-120 deg is noted.

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