Lowest-order average effect of turbulence on atmospheric profiles derived from radio occultation

Details Lowest-order average effect of turbulence on atmospheric profiles derived from radio occultation Lowest-order average effect of turbulence on atmospheric profiles derived from radio occultation

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...214..928e&link_type=abstract

Astrophysical Journal, Part 1, vol. 214, June 15, 1977, p. 928-933. Research supported by the Norges Teknisk-Naturvitenskapelig

Physics

Optics

1

Atmospheric Turbulence, Planetary Atmospheres, Radio Occultation, Turbulence Effects, Atmospheric Refraction, Error Analysis, Ionospheric Disturbances, Planetary Ionospheres, Radio Transmission

Scientific paper

Turbulence in planetary atmospheres and ionospheres causes changes in angles of refraction of radio waves used in occultation experiments. Atmospheric temperature and pressure profiles, and ionospheric electron concentration profiles, derived from radio occultation measurements of Doppler frequency contain errors due to such angular offsets. The lowest-order average errors are derived from a geometrical-optics treatment of the radio-wave phase advance caused by the addition of uniform turbulence to an initially homogeneous medium. It is concluded that the average profile errors are small and that precise Doppler frequency measurements at two or more wavelengths could be used to help determine characteristics of the turbulence, as well as accuracy limits and possible correction terms for the profiles. However, a more detailed study of both frequency and intensity characteristics in radio and optical occultation measurements of turbulent planetary atmospheres and ionospheres is required to realize the full potential of such measurements.

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