avigation method using a Global Navigation Satellite System (GNSS) receiver
A European organization has invented an improved method for determining a position of an object having a GNSS receiver. It offers reduced bandwidth, increased area coverage, low error percentage and better convergence time compared to already implemented systems.The invention is applicable to the field of world-wide, position-independent navigation and development of road applications and guidance services.Partners are sought for adapting this invention for navigation/road applications.
In the field of satellite navigation, a position of an object, which can be a stationary object or a moving object, is determined using radio signals transmitted by satellites orbiting earth. In the case of a moving object, also information relating to the movement of the object, for instance its direction and speed, can be obtained in this manner. There are various techniques known for determining the position of an object using satellite-transmitted radio signals. All of these techniques require the knowledge of the instantaneous position of a number of satellites orbiting earth (they can be geostationary satellites also) and the knowledge of high-precision clocks installed aboard these satellites.
A group of European researchers invented a better method for determining a position of an object having a GNSS receiver by processing differentiated data like carrier phase measurements and external products like ionosphere data. This is made possible by using a network of a plurality of fixed ground stations that each have a GNSS receiver. The object receives signals by the satellite that is positioned in direct view of it, then the service data in the object is updated, possible corrections relating to delays of the signals are determined and indicated and finally, the position of the object is determined based on those signals (which are processed in an un-differenced mode).
This method allows the user to determine his or her position at any point on earth, independently of any external infrastructure, in a quick and accurate manner. Given its great precision, the invention can be used on numerous transport and location applications that can be developed, such as lane keeping, automatic guidance of vehicles as well as for other services such as geographical ground measures, meteorology, forest fire prevention, disaster forecast and public security.
Innovations & Advantages
While other already implemented and working systems exist on the market (e.g. GPS), the main advantages that this invention has over them is that the signal that determines our position has better precision, needing less time and bandwidth to be located, with lower error percentage, while offering better coverage all over the world.
Current and Potential Domains of Application
- Air, sea and ground navigation
- Geographical ground measures
- Low Earth Orbiter navigation
- Road applications (e.g. lane keeping, automatic guidance of vehicles)
- Environmental monitoring
- Forest fire prevention
- Disaster forecast
- Public security