error on the estimated position of a receiver related to the true position. The positioning accuracy is the results of various phenomena (e.g., signal propagation through different layers of the atmospheres, NLOS between transmitters and receiver, multipath, geophysical processes, …). For many applications in satellite based precise positioning and especially in the application to geodesy, the study of positioning accuracy includes the broad field of time series analysis (e.g. parameters estimation, stochastic modeling, …).
Published in Chapter:
Optimization Algorithms in Local and Global Positioning
Jean-Philippe Montillet (Central Washington University, USA), Kegen Yu (Wuhan University, China), Lukasz Kosma Bonenberg (The University of Nottingham, UK), and Gethin Wyn Roberts (The University of Nottingham – Ningbo, China)
Copyright: © 2016
|Pages: 53
DOI: 10.4018/978-1-4666-9644-0.ch001
Abstract
With the rise of large city and the need of large civil engineering structures and city planning, surveying industry improves continuously their instruments/software in order to get cm accuracy position anywhere. Moreover, since the boom of mobile phones in the late 90s, location has become very valuable information for security, emergency and commercial applications. Depending of the application, the location technologies vary based on the accuracy of the location and the price of the system, which delivers the location information to the user. For outdoor applications, Global Navigation Satellite System is the main candidate, whereas if the user/mobile node is indoors or in a narrow street other technologies will be preferred such as the ones based on Wi-Fi or radio-frequency signal.This chapter provides an overview of different positioning technologies used in geo-location together with their limits/advantages. This chapter studies also a number of algorithms developed to estimate the position coordinates of a static or mobile user or target.