Abstract:
This thesis is based on the study of interplanetary scintillation (IPS) measurements using compact radio sources. In this study, I have shown for the first time that the solar-wind velocities may be estimated reliably and routinely from single-station IPS observations via careful modeling of the interplanetary medium. The single-station velocity estimates show an excellent agreement with results from the simultaneous three-station measurements made at Nagoya, Japan. Based on the method of single-station velocity estimation, the three-dimensional structures of the solar-wind velocity during the minimum and maximum activity of the current solar cycle have been determined, and their evolution with the solar activity has been studied
