Radio observations of the planets - The importance of laboratory measurements

Details Radio observations of the planets - The importance of laboratory measurements Radio observations of the planets - The importance of laboratory measurements

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.5471d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. E3, p. 5471-5490.

Astronomy and Astrophysics

Astronomy

14

Planetary Atmospheres, Planetary Surfaces, Planetology, Radio Astronomy, Atmospheric Composition, Cloud Physics, Radio Spectra, Wind Velocity Measurement, Planets, Radio Methods, Laboratory Studies, Atmosphere, Elements, Abundance, Dynamics, Clouds, Parameters, Hydrogen Sulfide, Ammonia, Dialectric Properties, Ice, Absorption, Sulfuric Acid, Carbon Monoxide, Wind, Velocity, Radiative Transfer, Microwave Methods, Surface, Gases, Scattering, Far-Infrared, Spectra, Spectroscopy, Conduction, Methane, Thermal Ef

Scientific paper

Laboratory data on the line broadening parameters of H2S gas under Uranian/Neptunian conditions, on the far wings of the H2S and NH3 line profiles, and on the dielectric properties of CH4-, NH3-, H2S-, and NH4SH-ice are needed to constrain elemental abundances and understand the dynamics and cloud physics in the atmospheres of the giant planets. Measurements of the absorption coefficient of gaseous H2SO4 at millimeter wavelengths are needed in order to obtain a better understanding of Venus' atmosphere. To determine wind velocity fields in Venus' and Mars' atmospheres, accurate measurements of the center frequencies of the CO lines are necessary. The absorption and scattering properties of lunar soils and/or terrestrial rock powders at frequencies from approximately 1 to 200 GHz, determined in laboratory experiments, would provide a valuable addition to existing data at 450 MHz, 35 GHz, and far infrared frequencies. These data would be used to analyze the microwave spectra of planetary surfaces. Such studies may be helpful in distinguishing the effects of radiative transfer from those of nonlinear heat conduction and internal heat sources.

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