Other
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000ivsg.conf..346k&link_type=abstract
International VLBI Service for Geodesy and Astrometry: 2000 General Meeting Proceedings, p. 346
Other
Lunar Gravitation, Very Long Base Interferometry, Phase Error, Differential Interferometry, Space Observations (From Earth), Ambiguity, Data Correlation, Lunar Prospector
Scientific paper
We performed a differential VLBI observation of Lunar Prospector (LP) and a QSO as a test observation for SELENE. Purpose of such observations for SELENE is estimation of the orbit and lunar gravity field. We developed a software for correlation of signals from LP. This software correlates carrier signal and calculates change of fringe phases. On the other hand, signals from a QSO were correlated by a conventional VLBI correlator. In correlation of LP, we could see the phase variation caused by the orbital motion around the Moon. The phase error was within about 0.6 degrees. This phase error suggests that we can determine position of LP within accuracy of 20 cm, if we could solve 2 ambiguity of phases. Because LP transmitted only one frequency signal, we could not solve the ambiguity. This 2 ambiguity can be solved by multi-frequency differential VLBI observations in SELENE project.
Araki Hiroshi
Fukuzaki Yoshihiro
Hanada Hideo
Iwadate Kenzaburo
Kawano Nobuyuki
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