多基准站GPS定位靶场测试方法研究

在靶场试验过程中,传统的单基准站由于基线长度的限制使其作用范围有限,从而超出一定距离后,差分精度随着大气误差相关性的减弱而明显受到影响；为了解决靶场GPS单频伪距差分定位距离远时精度下降问题,提出了多基准站GPS定位伪距差分定位方法;该方法深入分析伪距方程和伪距差分定位之间的关系；建立靶场基准站网络实时接收目标定位数据和基准站定位数据并实时传送到控制中心；利用基于距离的线性内差模型,设计多基准站数据处理算法和多基线测量数据加权处理方法,实时解算目标定位信息;测试结果表明,多基准站GPS定位伪距差分定位方法,能够有效地解决常规单基准站伪距差分定位精度随用户站与基准站距离增加而降低的问题,同时提高了测试精度。

Study on GPS Positioning Range Test Method of Multiple Base Station[JZ)][HS)]

In the range test, the traditional single reference station has limited range due to the limitation of the baseline length, and the difference accuracy is obviously affected by the decrease of the atmospheric error after a certain distance. In order to solve the problem that the GPS single frequency pseudorange differential positioning accuracy decreased resulted from far distance, a multi-base station GPS positioning pseudorange differential location method is proposed. This method analyzes the relationship between pseudorange equation and pseudorange differential location in depth; establishes a range base station to receive real-time target data and base station positioning data and transmits it to the control center. In order to solve the target location information in real time, this method designs multi-base station data processing algorithm and multi-baseline measurement data weighted processing method, which uses distance difference based linearity difference model. The test results show that the multi-base station GPS positioning pseudorange differential positioning method can effectively solve the problem that the precision of single-base pseudorange differential positioning decreases with the increase of the distance between the subscriber station and the base station, and improves the test precision.