Abstract
The network real-time differential positioning technique is a good choice for meter and sub-meter level’s navigation. More attention has been paid to the Global Positioning System (GPS) and GPS + GLONASS (GLObal NAvigation Satellite System) network real-time differential positioning, but less on the GPS + BDS (BeiDou Navigation Satellite System) combination. This paper focuses on the GPS + BDS network real-time differential positioning. Since the noise of pseudorange observation is large, carrier-phase-smoothed pseudorange is usually used in the network real-time differential positioning to improve the positioning accuracy, while it will be interrupted once the satellite signal is lost or a cycle slip occurs. An improved algorithm in the position domain based on position variation information is proposed. The improved method is immune to the smoothing window and only depends on the number of available satellites. The performance of the network real-time differential positioning using the improved method is evaluated. The performance of GPS + BDS combination is compared with GPS-only solution as well. The results show that the positioning accuracy can be increased by around 10%–40% using the improved method compared with the traditional one. The improved method is less affected by the satellite constellation. The positioning accuracy of GPS + BDS solution is better than that of GPS-only solution, and can reach up to 0.217 m, 0.159 m and 0.330 m in the north, east and up components for the static user station, and 0.122 m, 0.133 m and 0.432 m for the dynamic user station. The positioning accuracy variation does not only depend on whether the user is inside or outside the network, but also on the position relation between the user and network.
Highlights
Multi-constellation global navigation satellite system (GNSS) can provide more reliable and accurate position information than the standalone Global Positioning System (GPS)
In this contribution we will look at the application and performance of GPS + BeiDou Navigation Satellite System (BDS) combination in the meter and sub-meter level’s navigation
In Data set I, the stations LVTI, HELI and SSGT were chosen as the reference stations to form a triangle network, and the other four stations were selected as the user stations
Summary
Multi-constellation global navigation satellite system (GNSS) can provide more reliable and accurate position information than the standalone Global Positioning System (GPS). GPS + BDS combination has been widely used in high precision positioning [2,3,4,5] and the meter and sub-meter level’s navigation [6,7]. The real-time differential positioning technique, referred to as the pseudorange differential positioning technique, is a good choice for the meter and sub-meter level’s navigation due to its easy implementation without ambiguity resolution and competent positioning accuracy. Li et al [6] and Zhou et al [7] have demonstrated the good performance of GPS + BDS real-time differential positioning for short baselines. Thanks to the infrastructure of multiple reference stations, the network real-time differential positioning can provide a potential solution
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
