Satellite navigation device

Summary

A satellite navigation device, satnav device or satellite navigation receiver is a user equipment that uses one or more of several global navigation satellite systems (GNSS) to calculate the device's geographical position and provide navigational advice. Depending on the software used, the satnav device may display the position on a map, as geographic coordinates, or may offer routing directions. , four GNSS systems are operational: the original United States' Global Positioning System (GPS), the European Union's Galileo, Russia's GLONASS, and China's BeiDou Navigation Satellite System. The Indian Regional Navigation Satellite System (IRNSS) will follow and Japan's Quasi-Zenith Satellite System (QZSS) scheduled for 2023 will augment the accuracy of a number of GNSS. A satellite navigation device can retrieve location and time information from one or more GNSS systems in all weather conditions, anywhere on or near the Earth's surface. Satnav reception requires an unobstructed l

Official source

https://en.wikipedia.org/wiki/Satellite_navigation_device

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Modélisation de processus aléatoires pour l'intégration de GPS et de systèmes inertiels

1998

Indoor Navigation Performance Analysis

Pierre-Yves Gilliéron, Bertrand Merminod

INDOOR NAVIGATION PERFORMANCE ANALYSIS 1. Context of indoor navigation The objective of this research is to define and to implement a dedicated data model for indoor applications. Based on this specific model, route guidance and navigation algorithms can be integrated in order to develop applications with particular requirements. 2. Geodata modelling and algorithms for navigation In this paper, we present the development and the implementation of algorithms to access map databases by a user equipped with a pedestrian navigation system. The first step consists in building a 3D topological model especially designed for the localisation process. Rooms, corridors, stairs and halls must be assembled in order to provide a model for route guidance. The second step consists in the development of map-matching routines. The pedestrian navigation system provides the user’s position, which is combined with a link/node model. Developing a set of map matching functions for pedestrian navigation is a challenge because the style of human displacements indoors is fairly irregular. The final objective of the navigation system is to develop an integrated system which provides support when defining the travel, as well as guidance to the selected destination. For indoor navigation, the concept of “route” guidance must be reconsidered for several reasons: • The design of the map database is very different and the link/node model must be specific • The environment requires other means for localisation, which can accommodate rapid changes in the trajectory (up, down, left, right, backward). 3. Expected results The paper describes the following topics: • Design of the database developed for indoor applications • Implementation of short-path algorithms for route guidance • Evaluation of map-matching algorithms • Performance analysis of the integrated system • System test for several scenarii based on the use of a pedestrian navigation system

enc gnss 20042004

Context of indoor navigation The objective of this research is to define and to implement a dedicated data model for indoor applications. Based on this specific model, route guidance and navigation algorithms can be integrated in order to develop applications with particular requirements. 2. Geodata modelling and algorithms for navigation In this paper, we present the development and the implementation of algorithms to access map databases by a user equipped with a pedestrian navigation system. The first step consists in building a 3D topological model especially designed for the localisation process. Rooms, corridors, stairs and halls must be assembled in order to provide a model for route guidance. The second step consists in the development of map-matching routines. The pedestrian navigation system provides the user’s position, which is combined with a link/node model. Developing a set of map matching functions for pedestrian navigation is a challenge because the style of human displacements indoors is fairly irregular. The final objective of the navigation system is to develop an integrated system which provides support when defining the travel, as well as guidance to the selected destination. For indoor navigation, the concept of “route” guidance must be reconsidered for several reasons: • The design of the map database is very different and the link/node model must be specific • The environment requires other means for localisation, which can accommodate rapid changes in the trajectory (up, down, left, right, backward). 3. Expected results The paper describes the following topics: • Design of the database developed for indoor applications • Implementation of short-path algorithms for route guidance • Evaluation of map-matching algorithms • Performance analysis of the integrated system • System test for several scenarii based on the use of a pedestrian navigation system

2004

Indoor Navigation Performance Analysis

Pierre-Yves Gilliéron, Bertrand Merminod

enc gnss 20042004