Mission Instruments for Lunar Gravity Measurements using SELENE Sub-satellites.
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概要
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Global mapping of the lunar gravity field will be conducted using two micro sub-satellites of SELENE; the Relay Satellite (Rstar) and the VLBI Radio Satellite (Vstar). Four-way Doppler measurements toward the SELENE Main Orbiter above the lunar far side will be conducted by "the Relay Satellite Transponder (RSAT)" on Rstar. Differential VLBI observations will be conducted for three pairs of S-band and one pair of X-band carriers emitted from "the Differential VLBI Radio Sources (VRAD)" on Rstar and Vstar. These sub-satellites are requested to have long arcs of orbit without maneuver to detect orbit turbulence perturbed by lunar gravity, and to be simple and cost-effective design, therefore, there is no orbital and attitude control except spin stabilization. We have designed properties of the communication links for RSAT and VRAD mission, and confirmed them to be adequate for each link budget of the electric power and signal acquiring process of the Doppler frequency tracking.
- 日本測地学会の論文
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