Deep radio occultations and 'evolute flashes' - Their characteristics and utility for planetary studies

Details Deep radio occultations and 'evolute flashes' - Their characteristics and utility for planetary studies Deep radio occultations and 'evolute flashes' - Their characteristics and utility for planetary studies

Mar 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979icar...37..612e&link_type=abstract

Icarus, vol. 37, Mar. 1979, p. 612-626. NASA-supported research.

Physics

2

Planetary Atmospheres, Radio Occultation, Atmospheric Density, Atmospheric Pressure, Doppler Effect, Jupiter (Planet), Planetology, Radiant Flux Density, Ray Tracing, Refractivity, Observations, Radio Occultation, Atmosphere, Planets, Voyager 1, Saturn, Jupiter, Limbs, Occultations, Doppler Effect, Refraction, Position (Location), Temperatures, Radio Probes, Optical Properties

Scientific paper

Deep radio occultation signals from spacecraft passing behind planets may provide data on atmospheric absorption, turbulence, and structure, as well as information on the effects of planetary gravitational moments, rotation and zonal winds on the atmospheric shape. The strength of radio signals from a spacecraft passing behind a planet will at first decrease because of defocusing in the atmosphere, but then increase as the evolute of the planetary limb is neared, due to focusing caused by limb curvature within the evolute. Within the evolute, the availability of four simultaneous signal paths over four limb positions may render focused signals instantaneously great. The passage of Voyager 1 behind Jupiter and Voyager 2 behind Saturn will provide a test of deep radio occultation studies.

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