城市动态环境下GNSS RTK部分模糊度固定算法性能分析

摘要

针对当前GNSS RTK算法在城市环境下可用率较低,特别是动态条件下满足cm级精度定位的观测历元少的现状,将部分模糊度固定算法应用于城市动态环境GNSS RTK定位,并采用城市环境下车载数据验证部分模糊度固定算法的可用性.测试结果证明,该算法能显著提高城市环境下GNSS RTK模糊度固定率,增加cm级定位历元数量.%The availability of the current GNSS RTK algorithm in the city environment is still low and can rarely meet centimeter level positioning accuracy of observation epochs,especially under dynamic conditions.This paper attempts to apply the partial ambiguity fixing algorithm to the city dynamic environment GNSS RTK positioning.This can speed up ambiguity search efficiency and increase the available high precision positioning of the number of epochs.The vehicle borne data in the urban environment is used to verify the availability of the partial ambiguity fixing algorithm.The test results prove that the algorithm can significantly improve the ambiguity fixing rate and increase the number of epochs of cm level positioning in urban environments.