The Indian Space Research Organization (ISRO)'s Vikram Sarabhai Space Centre (VSSC) has developed a new GPS radiosonde, called Pisharoty sonde, with its ground station for atmospheric research and operational meteorology. The latest version of this radiosonde weighs 125 g and uses a bead thermistor, a capacitive humidity sensor, and a GPS receiver module. It computes geopotential heights and pressures using the temperature and GPS altitude profile. This paper describes the radiosonde and its associated ground system, summarizes its different versions, and discusses balloon tests of the newly developed version, including comparisons with internationally accepted high-quality radiosondes. * Retired.