Abstract
In general, the satellite signal received by GNSS receivers has errors such as satellite clock error, orbit error, ionospheric delay and tropospheric delay. In environments where high positioning accuracy is required, these error factors can be eliminated by using relative positioning using code measurements with carrier phase measurements. If relative positioning is performed using carrier phase measurements, it is possible to have positioning accuracy of cm level. In this paper, we analyse the positioning accuracy of relative positioning using the L1 signal of GPS and BDS. For this study, we collect GPS and BDS signal using two low-cost receivers. We also designed a software-based platform to perform the relative positioning. Finally, we analyse relative positioning accuracy for GPS/BDS integrated system as well as relative positioning accuracy for GPS and BDS.
Highlights
There have been reported a lot of researches on precision positioning using GNSS in many fields requiring accurate positioning information
The precise relative positioning using double-difference observations is widely used in the fields that require the high accuracy of positioning
We analyzed the accuracy of precise relative positioning of GPS-only, BDS-only and GPS/BDS integrated system using GPS L1 signal and BDS B1 signal
Summary
There have been reported a lot of researches on precision positioning using GNSS in many fields requiring accurate positioning information. When the GNSS signal is transmitted from the satellite to the receiver, the positioning error occurs due to various factors. The accuracy of positioning is lower than that relative positioning using double-difference observations. The precise relative positioning using double-difference observations is widely used in the fields that require the high accuracy of positioning. In the field of GNSS, there are many positioning studies using the integration of GPS and GLONASS. BDS satellites transmit ranging signals based on Cod e Division Multiple Access(CDMA) principle, like GPS. We collect GPS L1 signal and BDS B1 signal using two u-blox EVK-M8T receivers and design software based platform to perform precise relative posisitoing
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