单频GNSS实时精密相对定位研究

Research on Precise Relative Positioning with Single-frequency GNSS Receivers

利用价格低廉的单频接收机实现大范围高精度实时精密定位,是卫星大地测量研究的热点与难点问题之一。本文给出并实现了一种基于单频GNSS接收机的实时精密相对定位方法,并分别用短基线和中长基线的单频实测数据对进行了验证。实验结果表明,该算法能够对短基线实现2 mm^6 mm的实时动态定位,对30 km基线实现水平5 mm、垂直2 cm精度的实时动态定位,在导航定位、形变监测等领域有较大应用价值。

The rapid and precise positioning with low-cost single-frequency receivers over a wide area has become one of the research hot spot in the present satellite geodesy at home and abroad.In this paper,a method of real-time pre-cise relative positioning using single-frequency was designed and realized,and the algorithm was verified with practical single-frequency GPS observables from different length baselines of both IGS and CORS network.The result support that the positioning accuracy of our method is about 2 ~6 millimeter for short baselines, while the accuracy is about 5millimeter and 2 cm respectively for horizontal and vertical directions.