Electromagnetic depth sounding of the Moon

1Rokityansky, II, 1Tereshyn, AV
1S.I. Subbotin Institute of Geophysics of the National Academy of Sciences of Ukraine, Kyiv, Ukraine
Kosm. nauka tehnol. 2010, 16 ;(4):57-65
Publication Language: Russian
A brief overview of the lunar interior electrical conductivity study made from 1969 to 1972 is given. We consider unsolved problems of the study which can be investigated by future missions to the Moon, in particular, within the framework of the Russian Luna-Glob project. Electromagnetic sounding of the Moon uses variations of the interplanetary magnetic field (as input inducing field) measured with the orbital magnetometer and variations of the secondary induced (output) magnetic field measured at the lunar surface. From this data transfer function (in frequency or time domain) of the Moon interior is calculated and inverse problem (lucking for conductivity versus depth distribution) is solved. We consider physical aspects of electromagnetic sounding, discuss its limitations and principal sources of error, namely, the asymmetry of daytime and nighttime near-the-Moon plasma and the neglect of conductive mode.
Keywords: electrical conductivity, electromagnetic sounding, near-the-Moon plasma
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