On Detection of GPS Control Network of South Hongmei Rd.Crossriver Tunnel

To ensure the reliability of exclusive GPS control network of South Hongmei Rd.Crossriver Tunnel in Shanghai,high-precision total station is used for its detection.This paper introduces different ranging correction and corresponding formulation in brief and presents the detection process in detail.By a ranging comparison and analysis of GPS and total station,the results of the exclusive GPS control network can be proved to meet the requirements of relevant standards and practical construction.