Mission Outline of Lunar-A

Details Mission Outline of Lunar-A Mission Outline of Lunar-A

Jan 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002mbns.conf...38m&link_type=abstract

The Moon Beyond 2002: Next Steps in Lunar Science and Exploration, p. 38

Mathematics

Logic

Mission Planning, Lunar Core, Moonquakes, Lunar Evolution, Heat Transmission, Accelerometers, Temperature Sensors, Thermal Conductivity, Seismographs, Data Processing

Scientific paper

The Lunar-A mission of ISAS, Japan, will be launched in 2003 from Kagoshima Space Center using M-V launch vehicle. In this mission, two penetrators will be deployed on the near-side and the far-side of the Moon. Each penetrator contains an accelerometer, temperature sensors, thermal conductivity probes and two short-period seismometers. The seismological and heat flow data obtained by those instruments within the penetrator are first transmitted to a spacecraft orbiting at 200 km altitude and then sent back to the ground stations. The life time of the penetrator is estimated to be about one year. The seismic study will be made by observing various deep moonquakes at two widely-spaced stations. Observations of the amplitude and travel times of near-side deep moonquake event at the far-side stations offer a unique opportunity to prove or disprove the existence of a lunar core and to obtain information about its size and physical property. Data on the core size and its property are crucial to understand the bulk abundance of the siderophile elements. On the other hand, heat flow data at two sites will provide much better basis of estimating globally averaged heat flow value, which allow us to estimate the bulk abundance of refractory elements. Those cosmochemical signature derived from the penetrator experiment is essential for understanding the origin of the Moon.

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