【摘要】 首先采用精密单点定位(PPP)对POS系统中的GPS数据进行解算,以提高GPS定位精度,然后将处理结果应用到POS辅助空中三角测量,并与传统的DGPS解算结果进行比较。实验表明:采用PPP解算结果进行POS辅助空中三角测量,其测图精度可以满足国家标准对1∶2 000地形图航空摄影测量内业规范的精度要求,一定程度上解决了无基站情况下的POS数据定位问题。更多还原

【Abstract】 POS(Position and Orientation System) provides position and attitude information during aerial photography.There must be at least one reference GPS base station for traditional differential GPS(DGPS) positioning,and the establishment of a GPS station would be a very costly and difficult task in some areas.GPS Precise Point Positioning(PPP) has been advanced as a way to avoid the use of the GPS base station.This paper describes the approaches to the processing of an actual aerial photographic data by using both kinds of GPS positioning methods.The final results of the POS-supported aerial triangulation from PPP are compared with those from DGPS solution.The empirical results suggest that the accuracy of POS-supported aerial triangulation from PPP can satisfy the 1∶2 000 topographic map specifications for aerophotogrammetric office operation.It is feasible to process the POS data of ADS40 without a GPS Base Station by using Precise Point Positioning.更多还原