Precision analysis of BeiDou CORS system in urban road reconstruction and expansion

CORS-RTK network based on BeiDou navigation system enjoys a wide application in fields of infrastructure construction, but its applicability in urban road reconstruction and expansion with complex road conditions calls for further exploration. According to the precision analysis results drawn from a number of horizontal and vertical comparison experiments based on the real urban road conditions, the CORS-RTK network delivers a better performance than other measurement methods in terms of precision, convenience, and reliability under various urban road conditions. The precision of vehicle-mounted CORS-RTK at a normal speed (the speed that bears no influence on the traffic) allows alignment measurement in urban roadway reconstruction and expansion. In addition, the CORS-RTK network based on BeiDou Navigation System put in the same or even better performance than CORS-RTK based on GPS under most urban road conditions. As practice indicates, the CORS based on BeiDou Navigation System gives a satisfactory performance in precision, convenience, reliability, and coordinate secrecy, which enables its wide application in urban reconstruction and expansion.