CORSnet is the first Continuous Observation Reference Station (CORS) Network implemented in Sri Lanka for Real Time Correction (RTK) broadcasting for GNSS Surveying Instruments. Global Navigation Satellite System (GNSS) is a Satellite system that is used to pinpoint the geographic location of a user's receiver anywhere in the world. CORSnet fully utilizes location data obtained from GNSS such as GPS, GLONASS & COMPASS.