Application and quality control of GPS-RTK in urban surveying.
Sui Hong-da, Nie Min-li, Xu Jian Luo, Zhongke Feng, Huali Cai, Jia Wang · Beijing Linye Daxue xuebao · 2008
With the rapid development of global positioning system (GPS),real-time kinematic (RTK) technology is getting mature.This paper introduces the fundamentals of RTK and discusses the feasibility and limitation of the application of RTK technology in urban surveying.RTK survey does not require control network as well as intervisible points,its error does not propagate and accumulate.In field surveying,it can report the positioning result and accuracy in real time.RTK enables round-the-clock continuous observations and considerably increases efficiency compared with traditional survey methods.This makes it widely applicable in surveying and mapping.However,the surveying results are often affected and even false values occur because of limitations such as satellite signals,obstacles between base station and mobile station,multi-route errors,electric wave interferences and signal reflections.In addition,these false values are not easy to detect for the lack of self- checking function.This paper proposes the basic contents of quality control in RTK survey as well as major factors affecting it,and analyzes the fundamental ways to control the RTK survey quality.