Abstract
This paper describes a new positioning method which improves the availability and accuracy of multi-GNSS positioning in urban canyon environment using QZSS satellite. In our proposal method, we use GNSSs including GPS, QZSS, GLONASS, Galileo, and Beidou. Furthermore, we use the QZSS as an only master satellite. We conducted a static evaluation test in a narrow-sky environment with many obstacles above the GNSS antenna.The results of the static evaluation test show that our proposal method is highly available and has accurate positioning (fixed ratio: 92.7%, horizontal RMS error: 4.2cm) in urban canyon. In contrast, the number of DD measurements of the conventional multi-GNSS positioning method is 4 or less nearly all the time, indicating that this positioning does not work most of the time.
