GPS/BDS定位中一种有效粗差探测方法

Research on an Efficient Method for Gross Error Detection in GPS/BDS Positioning

针对传统GPS/BDS观测值残差检验阈值较难合理确定的问题,本文提出了一种无需对观测值进行残差假设检验的粗差探测方法。该方法根据单位权中误差估值进行整体检验判断是否存在粗差,若存在则利用"尝试法"思想进行粗差定位。实验结果表明,该方法在GPS/BDS定位中应用效果相对较好,尤其是在观测环境较差的情况下,在保证数据有效利用率保持较高的前提下,该方法能够较为明显地提高GPS/BDS平均定位精度,并且计算效率也完全能够满足1 s采样率的实时动态定位需求。

Due to the difficulty of determining the threshold value rationally when conduct conventional GPS/BDS observation residual test,a new method for gross error detection without residual test used in the GPS/BDS positioning is proposed in this paper. The unit weight mean square error is used firstly to confirm whether gross error exist for the observations,if exist,then utilize try-based idea to locate the gross error. The experiment result shows that,the method proposed in the paper can work well in the application of GPS/BDS positioning,especially on the poor observation environment,under the premise of maintaining high data effective utilization,still can improve the average positioning accuracy significantly,what’s more,the computational efficiency of this method is competent to meet the real time kinematic positioning of 1s sampling rate.