The document discusses the Indian Regional Navigational Satellite System (IRNSS) constellation and ground segment. The IRNSS constellation will consist of 7 satellites - 3 in geostationary orbit and 4 in geosynchronous orbit with an inclination of 29 degrees. The ground segment will include satellite control facilities, ranging and monitoring stations, a navigation control center, and timing and data communication networks to precisely position the satellites and disseminate navigation signals.