改进的BDS三频载波相位组合周跳探测与修复方法

Improvement of cycle slip detecting and repairing based on BDS three frequency carrier phase measurements

针对低采样率条件下BDS卫星周跳解算可能出现的解的不正确现象,本文提出利用多项式拟合法对组合后的载波观测值进行拟合,然后将发生周跳历元的偏差值与拟合原始值相减,来提高探测精度。结合实例分析,联合多项式拟合的三频伪距相位组合法可以明显提高探测精度,有效解决低采样率条件下BDS卫星周跳解算失败的问题。

Under the condition of low sampling rate,it is possible that solutions of BDS cycle slip are not correct,In this paper,the polynomial fitting method is applied to fit observationsby combination of carrier,which will be subtracted at epochs of cycle slips so as to improve the detection accuracy.Combined with practical examples,joint polynomial fitting of three frequency phase-pseudorange group can significantly improve the detection accuracy,and effectively solve the problem of cycle slip decoding failure under the condition of low sampling rate.