基于抗差方差分量的伪距/多普勒联合测速方法

Pseudo-range/Doppler joint velocity measurement method based on robust variance component estimation

为充分利用单频全球导航卫星系统(GNSS)接收机的卫星观测数据,提出基于单频码伪距和多普勒两类不同精度的观测值,联合解算接收机速度的方法,同时为平衡不同精度观测值之间的权重比例,抑制不良观测值对平差模型的影响,采用抗差等价权与方差分量估计相结合的方式建立适配的平差随机模型。通过大量的实验数据解算表明,所提出的联合测速方法使得码伪距和多普勒观测值得到更为充分有效的利用,并且在一定程度上提升了平差结果的鲁棒性、无偏性以及有效性。

To make full use of satellite observation data from single-frequency GNSS receiver, one kind of method based on single-frequency code pseudo-range and Doppler two different precision observations is proposed to jointly calculate the receiver speed. At the same time, the combination of the different equivalence weights and the variance component estimation are utilized to formulate an appropriate adjustment stochastic model. In this way, the weight ratio of different precision observations is balanced and the interference of the bad observations is suppressed. A number of experimental data calculation show that the joint velocity measurement method makes the pseudo-range and Doppler observations more effectively, which improves the robustness, unbiasedness and effectiveness of the adjustment results to some extent.