The gravity field tells us whether massive matters are included or not under the soil. Information of the evolution of the Moon will be obtained by measuring the distribution of gravity fields.
It is still under the debate whether the ionosphere exists on the Moon or not because of the shortage of data. The lunar ionosphere will be probed with RS by measuring the frequency change due to the passage of radio waves in the ionosphere.
|Dimension||1m x 1m x 0.65m|
The configurations of satellites and antennas
VRAD: Differential VLBI observation of radio sources
RS: Observation of the lunar ionosphere
Department of Basic Space Science,