![]() | Only 14 pages are availabe for public view |
Abstract Over the past years and so far, there is a global interest on how to improve positioning accuracy. The most popular method to fix positions is by using Global Navigation Satellite Systems (GNSSs) such as Global Positioning System (GPS), GLONASS and Galileo. These systems differ in their constellation specification; number of satellites, number of orbits, distribution of satellites in the orbits, etc. An essential reason for developing many satellite systems is to ensure maximum coverage to users on earth as to determine position the user needs using at least 4 visible satellites. A suitable solution to improve the accuracy is developing integrated satellite navigation system from various systems as it will provide more satellites than individual systems so that the user will have the ability to choose from many visible satellites and select the ones that provide better accuracy. The measured position will not be precise due to several factors. The most important of them is Geometric Dilution of Precision (GDOP). In this thesis, the effect of satellite navigation systems combinations on positioning accuracy is investigated by considering GDOP. The goal is to acquire the best combination of satellites which give minimum GDOP values in order to improve accuracy. A block scheme of integrated receiver is proposed. |