Astronomy and Astrophysics – Astronomy
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3077....5s&link_type=abstract
In NASA, Goddard Space Flight Center, First International Conference on Laboratory Research for Planetary Atmospheres p 5-26 (SE
Astronomy and Astrophysics
Astronomy
Absorptivity, Atmospheric Composition, Condensates, Microwaves, Millimeter Waves, Planetary Atmospheres, Radio Occultation, Refractivity, Spectroscopic Analysis, Atmospheric Effects, Environment Simulators, Gas Giant Planets, Planetary Temperature, Radio Astronomy, Radio Observation, Reflectance, Venus (Planet)
Scientific paper
Accurate data on microwave and millimeter-wave properties of potential planetary atmospheric constituents is critical for the proper interpretation of radio occultation measurements, and of radio astronomical observations of both continuum and spectral line emissions. Such data is also needed to correct for atmospheric effects on radar studies of surface reflectivity. Since the refractive and absorptive properties of atmospheric constituents often vary drastically from theoretically predicted profiles, especially under the extreme conditions characteristic of the planetary atmosphere, laboratory measurements under simulated planetary conditions are required. The instrumentation and techniques used for laboratory measurement of the refractivity and absorptivity of atmospheric constituents at wavelengths longward of 1 mm, under simulated planetary conditions (temperature, pressure, and broadening gases) are reviewed. Techniques for measuring both gases and condensates are considered. Also reviewed are the relative accuracies of the various techniques. Laboratory measurements are reviewed which have already been made, and additional measurements which are needed for interpretation of data from Venus and the outer planets, are highlighted.
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