Quiz 3

• GNSS


  Global Navigation Satellite System. GNSS is defined as the constellation of navigation satellites and any ground or space-based components that monitor the satellite signals and provide integrity and/or correction messages.
• SBAS


  Satellite Based Augmentation System/s. SBAS systems are geosynchronous satellite systems that provide services for improving the accuracy, integrity and availability of basic GNSS signals.
• GBAS


  GPS Receivers on the Ground at Base Stations that Track and Transmit Corrections to the on-coming receivers on Aircrafts or Roving GPS Receivers from, common epochs received from satellites in Space.
• Augmentation


  Increases, expands, intensify- the level of precision from the GPS signals and Improves the quality and the Integrity of the Point Positioning.
• WAAS


  Wide Area Augmentation System (WAAS) is a satellite based differential GPS system (DGPS)-By USA
• RIMS


  Ranging and Integrity Monitor Stations
• DGPS


  Differential GPS. Fixed positions using differential correction concepts from one or more receivers tracking at the same time with the satellite.
• RTK


  Real Time Kinematic. Fixed positions relative to a base or reference point at a point in time.
• MSAS


  MSAS is an SBAS that provides augmentation services to Japan. It uses two Multi-Functional Transport Satellites (MTSAT) and a network of ground stations to augment GPS signals in Japan.
• GAGAN


  GAGAN is an SBAS that supports flight navigation over Indian airspace. The system is based on three geostationary satellites, 15 reference stations installed throughout India, three uplink stations and two control centers. GAGAN is compatible with other SBAS systems, such as WAAS, EGNOS and MSAS.
• SBAS Satellites


  Stationary in Space
• GBAS


  GPS Receivers on the Ground at Base Stations that Track and Transmit Corrections to the on-coming receivers on Aircrafts or Roving GPS Receivers from, common epochs received from satellites in Space
• GNSS Multi Constellations


  • GPS - system developed by US
  • Glonass - system developed by Russians
  • Galileo - system developed by Europeans. Galileo, while not strictly speaking, an SBAS, is a system being developed by a consortium of European states. It will use its own satellite constellation that in effect combines the functions of GPS and WAAS.
  • Beidou - system Developed by Chinese
• SBAS Function


  To enhance the Basic systems above and the primary objective is for navigation safety
• Augmentation Systems


  • WAAS
  • EGNOS
  • MASAS
  • GAGAN