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