摘要
908专项海岛海岸带航空遥感调查中,充分应用了机载LiDAR(Light Detection And Ranging)系统,其航空数字照片与激光数据的定位采用机载GPS(global Positioning System)记录的数据,而机载GPS数据通常要与已知坐标地面点的同步观测数据进行差分解算以提高精度,所以已知地面点的坐标精度对整个架次的定位精度起着举足轻重的作用。由于海岛、海岸带地区地势复杂,不可能采用常规的基站联测方法获取到全部需要的地面点坐标。由此,可以尝试操作简单、精度较高的GPS精密单点定位(Precise Point Positioning(PPP))技术。文章阐述了GPSPPP技术在908专项中的应用情况,并进行了精度分析。分析显示,PPP技术解算的点位坐标精度完全能满足专项中制作1:10000正射影像图对地面基站的要求。
The airborne Light Detection and Ranging system is fully used in the 908 Item,which is called as Aerial Remote Sensing Investigation of China Island and Coast Area.The airborne GPS data is used to receive the positioning of the digital photos and laser data.Generally,the precision of the airborne GPS data needs to be improved using the differential GPS solution with the synchronization GPS data on some ground points whose coordinates are known.So the precision of the known ground points are significant to the whole data.Due to the complicated physiognomy of island and coast area,the GPS conjunction with base stations is impossible.Then the Precise Point Positioning（PPP） technology turns to be a suitable means for its simple operation and higher precision.The application of PPP in the 908 item is introduced.Besides,precision analysis is made out.The results show that the solution coordinate of base stations using PPP technology could satisfy the request to make orthophotomaps of 1：10000 scale.
出处
《海洋技术》
北大核心
2011年第2期18-21,共4页
Ocean Technology
基金
我国近海海洋综合调查与评价-海岛
海岸带航空遥感调查与研究(908-01-HY)
