关键词: 紧组合, 惯导系统, Applanix POS MV, 导航定位数据, 精度分析

Abstract: With the development of mobile measurement technology, the demand for high-precision, continuous, reliable, and stable navigation and positioning data is becoming increasingly strong. In response to the difficulty of single GNSS navigation and positioning in complex dynamic environments, Applanix POS MV is used to conduct precision experiments on tightly integrated inertial navigation systems. The research shows that: ①The precision of tightly integrated navigation and positioning is significantly better than that of single GNSS PPK positioning models, especially in areas with large angular rate and attitude changes, the advantage of combined navigation and positioning accuracy is more significant.②The tightly integrated navigation and positioning system has the highest accuracy in tracking all satellites, and the accuracy of shutting down the BeiBou satellite is equivalent to tracking only the GPS satellite. However, shutting down the GPS satellite results in significant loss of accuracy. The tight combination navigation positioning system has better PPK assisted positioning accuracy than RTX assisted positioning accuracy, but the RTX accuracy is better than 0.05 cm, which can meet the accuracy requirements of large-scale mapping. The results indicate that the use of PPK or RTX assisted tightly integrated inertial navigation systems can provide high-precision, continuous, reliable, and stable navigation and positioning data in complex situations.

Key words: tightly coupled combination, inertial navigation system, Applanix POS MV, navigation and positioning data, precision analysis