基于CORS的逆向RTD系统的关键技术和可行性研究

利用CORS系统的RTK技术在工程测量发挥了巨大的作用,但基于伪距的实时差分技术(RTD)由于其局限性应用相对较少,而基于CORS的逆向RTD系统可以实现多个流动站实时协同作业、信息共享,而且终端要求低。研究逆向RTD系统的二进制文件解码、RTCM电文编码与解码、RTD差分算法设计等关键技术,并编写多线程差分解算程序模块。同时进行实验分析,表明基于CORS的RTD具有较高的定位精度,逆向RTD与常规RTD的结果完全一致,验证了逆向RTD的正确性与可行性。

Research on key technology and feasibility of reverse RTD based on CORS

The RTK technology using CORS system has played huge role in engineering surveying, but RTD technology based on pseudorange are rarely applied as its limitations, while reverse RTD based on CORS system may realize multiple mobile stations for real-time collaboration, information sharing and low terminal requirements. This paper studies on reverse RTD system＇s key technologies including binary decoding, RTCM message encoding and decoding, RTD differential algorithm design and programs of muhithreading difference resolving module. Simultaneously experiments indicates that RTD technology based on CORS has high positioning accuracy, the result of reverse RTD is completely consistent with that of conventional RTD, moreover, confirms the correctness and feasibility of reverse RTD.