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Terms of
Reference
In satellite-based precise positioning, the dominant factors
are the number and geometric distribution of the satellites tracked by the
receivers. In the case of Global Navigation Satellite Systems such as GPS,
GLONASS, and the planned GALILEO system, four visible satellites are the minimum
requirement for precise three-dimensional positioning. In general, the more
satellites that are tracked, the more reliable the positioning solutions.
However, in some situations, such as in downtown urban canyons, engineering
construction sites, and in deep open-cut pits and mines, the number of visible
satellites may not be sufficient. In the worst situations, such as in underground
tunnels and inside buildings, the satellite signals may be completely absent.
Such problems with existing GNSS systems can be addressed by the inclusion
of additional ranging signals transmitted from ground-based "pseudo-satellites"
(pseudolites). Pseudolites are an exciting technology that can be used for
a wide range of positioning and navigation applications, either as a substantial
augmentation tool of spaceborne systems, or as an independent system for indoor
positioning applications.
Steering
Committee
Jinling
Wang (Univ. of New South Wales, Australia) - Chair
Gethin Roberts (IESSG,
Univ. of Nottingham, UK) - Vice-Chair
Dorota Grejner-Brzezinska (Ohio State
University, USA) - Vice-Chair
Objectives
The goal of this study group is to investigate new
concepts of pseudolite-related positioning and navigation applications. The
objectives of the research activities are to study:
(a) Pseudolite augmentation of GPS.
(b) Pseudolite-only positioning scenarios.
(c) Integration of pseudolites with other sensors, such as INS.
These objectives will be achieved by:
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Promoting dialogue between SG members.
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Encouraging symposia and sessions at conferences
with the theme of pseudolite technology and applications.
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Setting up a SG website providing a focus for
pseudolite research and applications with the relevant links.
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Developing a comprehensive bibliography for pseudolite
research and applications.
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