Abstract
Global Navigation Satellite System (GNSS) is widely used for navigation and positioning in engineering and geoscience applications. Depending on the measurement types (pseudorange and carrier-phase measurements) and error/bias models used in data processing, GNSS can achieve meter to centimeter level or better positioning accuracy. Multipath is not modeled in GNSS data processing usually; it can lead to errors of few meters in pseudorange measurements and few centimeters in carrier-phase measurements. Therefore, multipath errors may limit the standard positioning service to few meters and high-precision positioning to few centimeters. This chapter describes the multipath error source, the characteristics in measurements, and the factors affecting the magnitude of multipath errors. Moreover, the state-of-the-art multipath mitigation methods are described and discussed. This chapter contains all you need to understand GNSS multipath errors and their characteristics and state-of-the-art hardware- and software-based multipath mitigation techniques.
Original language | English |
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Title of host publication | GPS and GNSS Technology in Geosciences |
Editors | George p. Petropoulos, Prashant K. Srivastava |
Publisher | Elsevier |
Pages | 77-98 |
Number of pages | 22 |
ISBN (Print) | 978-0-12-818617-6 |
DOIs | |
Publication status | Published - Feb 2021 |
Keywords
- Multipath characteristics
- Multipath effect
- Multipath mitigation
- Ray tracing
- Reflected signals
- Sidereal filters
- Stochastic models