Improvements in the tropospheric refraction correction for range measurement

Details Improvements in the tropospheric refraction correction for range measurement Improvements in the tropospheric refraction correction for range measurement

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980rspta.294..341h&link_type=abstract

(Royal Society, Discussion on the Satellite Doppler Tracking and Its Geodetic Applications, London, England, Oct. 10, 11, 1978.)

Computer Science

Sound

Atmospheric Refraction, Error Correcting Devices, Radio Wave Refraction, Range Errors, Satellite Transmission, Troposphere, Atmospheric Models, Atmospheric Temperature, Balloon Sounding, Vertical Distribution, Water Vapor

Scientific paper

The retardation of a satellite's radio signal by the earth's troposphere and stratosphere is significant even when no bending of the signal path occurs, as in the zenith direction. The resulting error in range of Doppler data is generally estimated by assuming rectilinear propagation through a model atmosphere based on conditions at the tracking station. The two-quartic model of atmospheric refractivity used in this study ('dry' and 'wet' components) was derived earlier by the author from studies of meteorological balloon data, with parameters chosen to yield the right mean range correction at the zenith. Errors develop at very low elevation angles, partly because (1) the precise shape of the refractivity profile, involving temperature and water vapour irregularities, becomes important, and (2) signal path bending effects become significant. Corrections for the path curvature effect are presented, and possible ways of improving the profile model are discussed.

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