text: System description The IRNSS system comprises a space segment and a support ground segment.
  Space segment
  The constellation consists of 7 satellites. Three of the seven satellites are located in geostationary orbit (GEO) at longitudes 32.5° E, 83° E, and 131.5° E, approximately  above Earth's surface. The remaining four satellites are in inclined geosynchronous orbit (GSO). Two of them cross the equator at 55° E and two at 111.75° E.
  Ground segment
  The ground segment is responsible for the maintenance and operation of the IRNSS constellation. The ground segment comprises:
  IRNSS Spacecraft Control Facility (IRSCF)
  ISRO Navigation Centre (INC)
  IRNSS Range and Integrity Monitoring Stations (IRIMS)
  IRNSS Network Timing Centre (IRNWT)
  IRNSS CDMA Ranging Stations (IRCDR)
  Laser Ranging Stations
  IRNSS Data Communication Network (IRDCN)
  The IRSCF is operational at Master Control Facility (MCF), Hassan and Bhopal. The MCF uplinks navigation data and is used for tracking, telemetry and command functions. Seven  FCA and two  FMA of IRSCF are currently operational for LEOP and on-orbit phases of IRNSS satellites.
  The INC established at Byalalu performs remote operations and data collection with all the ground stations. The ISRO Navigation Centers (INC) are operational at Byalalu, Bengaluru and Lucknow. INC1 (Byalalu) and INC2 (Lucknow) together provide seamless operations with redundancy.