Microwave properties of solid CO2

Details Microwave properties of solid CO2 Microwave properties of solid CO2

Oct 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980jgr....85.5481s&link_type=abstract

Journal of Geophysical Research, vol. 85, Oct. 10, 1980, p. 5481-5484.

Physics

4

Carbon Dioxide, Electrical Properties, Mars Surface, Microwaves, Solidified Gases, Density (Mass/Volume), Electrical Measurement, Permittivity, Superhigh Frequencies

Scientific paper

Measurements over the range of 2.2 to 12.0 GHz show that CO2 snow is a slightly lossy dielectric whose constant varies with density following the Rayleigh formula to 1.27 g/cu cm. It is independent of frequency and does not vary with temperature in the 113 to 183 K range; frequency independence and agreement with the Rayleigh fit are obtained from measurements on dry block ice. The dielectric constant of solid CO2 in block form is lower than that of solid water ice or solid rock; in powder form, the constant for CO2 is also lower than that of H2O (snow) or soils. These measurements may be useful in limiting the interpretations of the Viking radio reflection experiment; a radio value of 3.0 for the dielectric constant near the North Pole would be strong evidence against the presence of cm thicknesses of CO2 in that region.

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