A mobile four-electrode array and its application to the electrical survey of planetary grounds at shallow depths

Details A mobile four-electrode array and its application to the electrical survey of planetary grounds at shallow depths A mobile four-electrode array and its application to the electrical survey of planetary grounds at shallow depths

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991jgr....96.4117g&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 96, March 10, 1991, p. 4117-4123.

Mathematics

Logic

12

Electrical Resistivity, Equipment Specifications, Planetary Surfaces, Electrical Properties, Geological Surveys, Roving Vehicles, Soil Mapping

Scientific paper

This paper deals with a mobile array for mapping the electric properties of planetary surfaces, with a resolution of the order of a few meters in all dimensions. The principle of the measuring technique is first recapitulated; the prototype model of this novel instrument is then described. The array was operated at a frequency of 128 khz over a site with apparent resistivities to the range 20-100 ohm-m and the experimental results are found to be in excellent agreement with those derived from another independent technique. It is demonstrated, from measurements collected on a second site with resistivities of the order of several kiloohm meters, that this new technique also yields information about the dielectric constant of the ground. This method is not only applicable to geological surveys on earth but also appears particularly attractive for the exploration of the surface of other planets by means of landers, penetrators, or unmanned rovers.

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