Abstract:
GNSS (Global Navigation Satellite System) positioning accuracy depends on a complicated interaction of various factors. According to the GNSS signal propagation trajector...Show MoreMetadata
Abstract:
GNSS (Global Navigation Satellite System) positioning accuracy depends on a complicated interaction of various factors. According to the GNSS signal propagation trajectory, accuracy depends on the quality of the pseudorange and carrier phase measurements as well as the broadcasted ephemeris data. The factors are reflected by measurement error, a fundamental assumption is made as the error can be allocated to individual satellite pseudorange. It is common to separate a geometry-related quality factor from the measurement error which called the dilution of precision (DOP) and errors in the pseudo-range measurement called user-equivalent range error (UERE). UERE is further divided into signal-in-space range error (SISRE) and user equipment error (UEE). This paper mainly takes GPS as an example, considering environment obstruction in the HDOP calculation, and estimates the UERE value by modeling and empirical values. An algorithm is designed to determine the visibility of the satellite based on the fish-eye image. The actual data and the estimation results are also compared and the UERE estimation value is corrected. Finally, the results of the analysis are compared to obtain the conclusion that the GPS positioning error in an open environment is lower than that in the more obstructed environment, and one of the main reasons for different UERE in different scenarios is multipath error.
Published in: 2018 16th International Conference on Intelligent Transportation Systems Telecommunications (ITST)
Date of Conference: 15-17 October 2018
Date Added to IEEE Xplore: 09 December 2018
ISBN Information: