多基站GPS差分定位在航标遥测遥控中应用

Application of Multi-station Differential GPS Positioning in Beacon Telemetry/Remote Control

为了提高航标遥测遥控系统中GPS单频伪距定位精度,提出多基站GPS差分伪距定位方法。该方法以单基站定位为基础,先通过单基站伪距改正数消除对流层、电离层的影响,再根据基站与测量站之间的距离关系建立基于距离的线性内插模型,从而得到综合改正数。利用综合改正数修正测量站的数据,提高了定位精度。实验结果表明,此方法能够有效地减少基站与测量站之间距离带来的误差,大大提高了航标遥测遥控的定位精度。

In order to improve the GPS single-frequency pseudo-range positioning accuracy in beacon telemetry remote control system, a multi-station differential GPS pseudo-range positioning algorithm based on single-station location is proposed. This algorithm, by using single base-station pseudo-range correction, first eliminates the tropospheric and ionospheric effects; then according to the distance between base-station and measured station, the linear interpolation model is established and the integrated corrections are thus obtained finally, the measured station data is corrected and the positioning accuracy improved. The experiment results show that this algorithm could reduce the errors caused by the distance between base-station and measured station, and thus greatly improving the positioning accuracy of the beacon telemetry/remote control.