基于PP-RTX技术的机载POS定位精度分析

Accuracy analysis of airborne POS positioning based on PP-RTX technology

针对大面积及无基站地区航摄定位精度较低的问题,提出1种大范围高精度事后航摄定位解算的方法:结合全国7个地区9个架次直升机航摄轨迹数据,对事后实时扩展(PP-RTX)与多(单)基站事后差分解算结果进行比较;对基于PP-RTX技术和多(单)基站事后差分技术的机载定位定姿系统(POS)的定位精度分别进行分析,可知在水平方向、高程方向均达到9 cm以内的相对精度。实验结果表明,基于PP-RTX技术的机载POS定位能够满足航摄定位的精度要求,可为大面积及无基站地区航摄提供参考。

Aiming at the problem of low positioning accuracy of the aerial photography in large area and non-base station area,the paper proposed a high-precise wide-range post-processed positioning solution method of aerial photography:the solution results of post-processed real-time extended(PP-RTX)and multi/single base stations post-processing difference were compared combining with the aerial photographic trajectory data of nine sorties of helicopters in seven regions of China;and the positioning accuracy of airborne position and orientation system(POS)based on PP-RTX and multi/single base stations post-processing difference respectively was analyzed,then it was known that the relative accuracy in horizontal direction and elevation direction was both less than 9 cm.Experimental result showed that the airborne POS positioning based on PP-RTX technology could meet the positioning accuracy requirements of aerial photography,which would provide a reference for the aerial photography in large area and non-base station area.