GPS双频接收机单点定位算法研究

为了提高单点定位的精度,利用GPS双频接收机接收到的双频码伪距和相位伪距测量值进行组合,消除了卫星钟差、接收机钟差、电离层延迟和对流层延迟等误差因素,求出了双频的整周模糊度,并对周跳进行了探测和修复,应用消除了电离层效应的相位伪距值对码伪距进行了平滑,得到了更高精度的伪距值,进而求出接收机坐标.最后,进行了实例分析,理论值与测站的标准坐标值进行了比较,精度较高,并且具有很好的稳定性.

Study on GPS Dual Frequency Receiver Single-Stand Positioning Algorithm

To improve precision of single-stand positioning, the combination of dual-frequency code pseudo-range and carry phase pseudo-range measurement has to be make use of by GPS dual frequency receiver eliminate some error factor, such as: satellite clock bias, receiver clock bias, ionosphere delay and troposphere delay. And dual-frequency integrate ambiguity is obtained. The cycle slip is detected and compensated. Code pseudo-range is smoothed by ionosphere-free phase pseudo-range. Finally, the instance is analyzed by comparing theoretic value with stand detected standard coordinate. The precision is rather high, and the stability is very good.