Use of Radar Inferometry for Study of Dynamics of the Earth's Surface and Troposphere

The results of interferometric processing of survey data for the northern shores of the Caspian Sea by synthetic aperture radar (SAR) are presented. The survey was made in May 1996 from near-earth orbits of the ERS-1 and ERS-2 satellites, respectively, on successive days in the C range with vertical polarization. A map of the coherence of the radar images was compiled and an interferogram was obtained. The types of surface cover classified and the changes occurring during the time between the surveys are described, including shifts of the scattering surface and changes in phase path length of radio waves attributable to fluctuations of the tropospheric refraction coefficient.