High stability frequency broadcast through INSAT

Abstract

This paper describes initial results from an on-going collaboration between Raman Research Institute and the Indian Space Research Organization on various aspects of astrometry of celestial radio sources and the geosynchronous satellite. As a first step, a prototype system has been developed for disseminating a high stability frequency reference from a pair of coherently generated tones broadcast through a geosynchronous satellite. This paper describes the system and presents some initial results related both to frequency dissemination and accurate measurements of range rate of INSAT 2A.