Accession Number : AD0685217

Title :   A TWO-QUARTIC REFRACTIVITY PROFILE FOR THE TROPOSPHERE, FOR CORRECTING SATELLITE DATA.

Descriptive Note : Technical memo.,

Corporate Author : JOHNS HOPKINS UNIV SILVER SPRING MD APPLIED PHYSICS LAB

Personal Author(s) : Hopfield,H. S.

Report Date : SEP 1968

Pagination or Media Count : 44

Abstract : A new model of the height profile of tropospheric refractivity N is presented as the basis for an improved tropospheric correction for satellite doppler or range data. (N = 1,000,000 (n-1), where n is the index of refraction.) The model treats the 'dry' and 'wet' components of N separately, each as a fourth-degree function of height above the geoid. The height parameters are different for the two and are obtained from meteorological balloon data. A latitude dependence has been found for the 'dry' height. The resulting expressions for the correction of satellite doppler and range data are presented, and their effectiveness is evidenced by figures showing two different kinds of observed data: first, doppler residuals for several satellite passes; and second, the 'navigation' error in station-to-orbit slant range, in each case without and with the correction. The use of the correction removed obvious systematic errors. (Author)

Descriptors :   (*METEOROLOGICAL PHENOMENA, CORRECTIONS), REFRACTIVE INDEX, HIGH ALTITUDE, METEOROLOGICAL SATELLITES, DOPPLER EFFECT, METEOROLOGICAL BALLOONS, EFFECTIVENESS, TROPOSPHERE

Subject Categories : Atmospheric Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE