This Satellite built by ISRO carries advanced meteorological payload called as Imager, wherein infra-red detectors are cooled to 90 K by means of passive radiant cooler. Heat load from detectors is around 20 mW. Cryogenic passive radiant cooler works on the concept of staged radiator cooling are very effective solutions in space application for very low heat load for 70-100 K temperature requirement. Imager cooler consists of three stages. Stages are designed such that successive stages have higher degree of isolation from the external loads and each stage is radiant to space. The first stage temperature is cooled to 200 K, the second around 120 K and third stage is around 90 K. Infra-red detectors are mounted on the third stage. The satellite has successfully completed seven years in the orbit. In-orbit temperature and control heater power data over seven years validates its intended consistent performance.