Relative position determination of a lunar rover using high-accuracy multi-frequency same-beam VLBI

Details Relative position determination of a lunar rover using high-accuracy multi-frequency same-beam VLBI Relative position determination of a lunar rover using high-accuracy multi-frequency same-beam VLBI

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010scchg..53..571l&link_type=abstract

Science China Physics, Mechanics and Astronomy, Volume 53, Issue 3, pp.571-578

Astronomy and Astrophysics

Astronomy

2

Same-Beam Vlbi, Differential Phase Delay, Relative Position Determination, Lunar Rover

Scientific paper

Multi-frequency same-beam VLBI means that two explorers with a small separation angle are simultaneously observed with the main beam of receiving antennas. In the same-beam VLBI, the differential phase delay between two explorers and two receiving telescopes can be obtained with a small error of several picoseconds. The differential phase delay, as the observable of the same-beam VLBI, gives the separation angular information of the two explorers in the celestial sphere. The two-dimensional relative position on the plane-of-sky can thus be precisely determined with an error of less than 1 m for a distance of 3.8×105 km far away from the earth, by using the differential phase delay obtained with the four Chinese VLBI stations. The relative position of a lunar rover on the lunar surface can be determined with an error of 10 m by using the differential phase delay data and the range data for the lander when the lunar topography near the rover and the lander can be determined with an error of 10 m.

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