长距离多站RTK定位中整周模糊度求解的研究

全球定位系统(G lobal Position ing System,GPS)由于其准确性、实时性以及易用性而广泛应用。实时动态定位(RTK?Real-time K inematic)就是其一个典型的民用实例。但是,由于在动态点上观测时间较短,各种类型误差变化较大,很难准确实时计算出整周模糊度,进而极大地影响了定位精度。本文提出了一种误差模拟的算法,根据定位误差的渐变原理,充分利用动态点周围的多个基准站上准确丰富的误差信息,根据一定规则模拟动态点上的误差,最终计算动态点上的整周模糊度。实验证明:在基准站距离较短,采样率较高的情况下本文的算法非常有效。

The Calculation of Integer Ambiguity in Long Distance and Multiple Station RTK Positioning

Global Positioning System is used widely because of its high precision,convenience and low complexity.A case in point in civil is Real-time Kinematic(RTK).But on the other hand it is very difficult to determine integer ambiguity while surveying with RTK since survey time is too short and the error condition changes too much which all affect the final positioning precision greatly.An error simulation method was proposed in this paper to estimate the error on moving point according to the information on several base stations around it.Once the error was got,we can calculate integer ambiguity on moving points very easily.Several experimental results show that when the distance between base stations is not too long and the sample rate is not too low,the proposed method is very effective.