Abstract

Theoretical studies have been made of the characteristics of radio waves diffracted at the limb and refracted in the atmosphere of a planet. Sample computations have been made of atmospheric perturbations to the communication links to and from a Mars flyby spacecraft having a trajectory that involves occultation of the spacecraft by the planet as seen from the earth. It is concluded that such a radio occultation experiment can provide important new information on the atmospheric scale height and surface density of a planetary atmosphere, and, when combined with other information, can help determine atmospheric constituents.

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