基于VRS的虚拟观测值生成与质量评定

摘要

The Virtual Reference Station technique is a typical high-precision positioning method which has been greatly developed during the past decades.The key issue of VRS positioning technique is to generate the measurements of the virtual reference station using the real data from the surrounding reference stations.In order to guarantee the accuracy of the virtual observation the tropospheric and ionospheric delay should be simulated in this paper.The virtual phase and carrier phase observation models are investigated and the corresponding positioning results are evaluated.The test data comes from the regional reference network in Shanghai.The results demonstrate the reliability and effectiveness of the approach.%GPS虚拟参考站（VRS）技术是近些年来发展的一种高精度的快速定位技术。VRS技术的核心是通过用户站周围多个参考站的观测数据融合生成虚拟参考站的观测值,其关键是正确模拟测量区域内的各相关误差项。推导了用于VRS定位的码伪距和载波相位虚拟观测值模型,并对计算结果进行了质量评定,试验采用上海市GPS基准站观测网络收集的数据进行计算分析,证明了所述算法的可行性和有效性。