NavigationLand & Marine Navigation using GNSS


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Sushant Sawant
Bharathidasan University
Tiruchirappalli (India)

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NavigationLand & Marine Navigation using GNSS

  1. 1. Land & Marine Navigation using GNSS
  2. 2. Navigation  Navigation is a field of study that focuses on the process of monitoring and controlling the movement of a craft or vehicle from one place to another.  Navigation, in a broader sense, can refer to any skill or study that involves the determination of position and direction
  3. 3. Objectives of GPS navigation  To know your position.  Efficient use of fuel.  Maintain a flight schedule.  Avoid traffic congestion.  To increase the time of delivery.
  4. 4. Four general categories 1. Land navigation, 2. Marine navigation, 3. Aeronautic navigation, 4. Space navigation
  5. 5. Modern navigation methods A. Non-Electronic Navigation System: 1. Dead reckoning 2. Pilotage 3. Celestial navigation B. Electronic navigation 1. Radio navigation 2. Radar navigation 3. Satellite navigation
  6. 6. • Dead reckoning or DR, in which one advances a prior position using the ship's course and speed. The new position is called a DR position. It is generally accepted that only course and speed determine the DR position. Correcting the DR position for leeway, current effects, and steering error result in an estimated position or EP. An inertial navigator develops an extremely accurate EP. • Celestial navigation involves reducing celestial measurements to lines of position using tables, spherical trigonometry, and almanacs.
  7. 7. • Radio navigation uses radio waves to determine position by radio direction finding systems • Radar navigation uses radar to determine the distance from or bearing of objects whose position is known. • Satellite navigation uses artificial earth satellite systems, such as GPS, to determine position.
  8. 8. Satellite navigation • Global Navigation Satellite System or GNSS is the term for satellite navigation systems that provide positioning with global coverage. • A GNSS allow small electronic receivers to determine their location (longitude, latitude, and altitude) to within a few metres using time signals transmitted along a line of sight by radio from satellites. • Receivers on the ground with a fixed position can also be used to calculate the precise time as a reference for scientific experiments.
  9. 9. • There are three satellite Navigation System 1.GPS by USA 2.GLONASS by Russia 3.GALILEO by European union
  10. 10. Marine Navigation Governments and industrial organizations around the world are working together to develop performance standards for Electronic Chart Display and Information Systems, which use GPS and/or DGPS for positioning information. GPS playing as increasingly important role in the management of marine port facilities. E.g. the management and operation of automated container placement in the world’s largest port facilities. GPS information is embedded within a system known as the Automated identification System (AIS) transmission.
  11. 11. Benefit of Marine Navigation • Allows access to fast and accurate position, course, and speed information, saving navigators time and fuel through more efficient traffic routing. • Provides precise navigation information to boaters. • Enhances effieiency and economy for container management in port facilities. • Increases safety and security for vessels using the AIS.
  12. 12. Rail Transportation & GNSS Applications • Rail systems throughout the world use GPS to track the movement of locomotives, rail cars, maintenance vehicles, and wayside equipment in real time
  13. 13. Count…. • Modern railways in several different countries are using Positive Train Control (PTC) systems to prevent collisions, derailments, work zone incursions, and passage through switches in the wrong position. PTC is the combination of real-time location information with sophisticated command and control systems to monitor and control train movements.
  14. 14. Benefits • GPS gives dispatchers and passengers more accurate information on train arrivals • GPS also synchronizes the timing of railroad communication systems, including data transmissions for PTC, voice contact between locomotive engineers and dispatchers, and intermodal communications among trains, rail stations, ports, and airports. .
  15. 15. Road & Highway Applications • The availability and accuracy of the Global Positioning System (GPS) offers increased efficiencies and safety for vehicles using highways, streets, and mass transit systems. Many of the problems associated with the routing and dispatch of commercial vehicles is significantly reduced or eliminated with the help of GPS. This is also true for the management of mass transit systems, road maintenance crews, and emergency vehicles.
  16. 16. GPS enables automatic vehicle location and in-vehicle navigation systems that are widely used throughout the world today.
  17. 17. Time-definite delivery • Using GPS technology to help track and forecast the movement of freight has made a logistical revolution, including an application known as time-definite delivery. In time-definite delivery, trucking companies use GPS for tracking to guarantee delivery and pickup at the time promised, whether over short distances or across time zones.
  18. 18. “The promise of GPS technology for increasing safety and security, reducing congestion, and improving efficiency are limitless. Quite simply, GPS has become the enabling technology for transportation.” Jeffrey N. Shane, Former Under Secretary for Policy, U.S. Department of Transportation
  19. 19. References • • • GPS Guide for Beginners by GARMIN International, Inc. • GPS & Principles of Navigation: principles-of-navigation-a6222