Transcription of Global Navigation Satellite System (GNSS)
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Global Navigation Satellite System (GNSS)
1 Global Navigation Satellite System (GNSS) OUTLINE: ABSTRATC ..1 1- 2- GNSS 3- GNSS SIGNALS .. 13 4- SIGNAL PROCESSING AND receiver DESIGN ..14 5- REFERENCE SYSTEMS .. 16 6- OBSERVATION 19 7- WIRELESS SYSTEMS AND GNSS 8- CONCLUSION ..33 9- Glossary .. 34 36 ABSTRACT Recently, there is an increase interest in positioning techniques based on Global Navigation Satellite Systems (GNSS) such as Global Positioning System (GPS), cellular network infrastructure or on the integration of the two technologies for a wide spread of applications such as Automatic Vehicle Location (AVL), tracking systems, Navigation , Pedestrian Navigation Systems (PNSs), intelligent transportation Systems, precise positioning and emergency callers. During the last 15 years there are many important events in the field of Satellite Navigation systems such as: (a)the full operational GPS in 1993, when 24 GPS satellites were operating in their assigned orbits, available for Navigation use and providing Standard Positioning Services 2 (SPS), (b) the new European Satellite System Galileo, (c) the modernized of US Satellite System GPS, and (d) the reconstruction of Russian Satellite System Glonass.
monitoring applications. It provides particularly coded satellite signals that can be processed in a GPS receiver, allowing the receiver to estimate position, velocity and time (Hofmann-Wellenhof et al., 2001). There are four GPS satellite signals that are used to compute positions in three dimensions and the time offset in the receiver clock.
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