网络RTK定位性能分析

Positioning Performance Analysis of Network RTK

网络RTK技术作为传统RTK算法的扩展,可利用区域参考站网的大气产品提供作业范围更广、成本更低、初始化时间更短、更高精度的定位服务性能。首先对网络RTK算法策略进行了总结归纳,采用实测数据从基准站模糊度固定效果、大气延迟建模精度和终端定位性能三个方面评估分析了网络RTK的定位性能。试验结果表明,网络RTK技术和单基线RTK算法水平定位精度均优于1 cm,高程定位精度2 cm左右,模糊度固定率均接近100%。

As an extension of traditional RTK algorithm, network RTK technology can provide positioning service performance with wider operation scope, lower cost, shorter initialization time and high precision by using atmospheric products of regional reference station network. First, the strategy of network RTK algorithm is summarized, and then the positioning performance of network RTK is evaluated and analyzed from three aspects: fixing effect of reference station ambiguity, modeling accuracy of atmospheric delay and positioning performance of terminal using measured data. The experimental results show that the horizontal positioning accuracy of network RTK technology and sing baseline RTK algorithm is better than 1 cm,the elevation positioning accuracy is about 2 cm,and the ambiguity fixation rate is close to 100%.