大面阵数字航摄仪SWDC的关键技术及应用

Technology and Application of Large Array Digital Airborne Photogrammetric Camera-SWDC

国内首创大面阵数字航摄仪-SWDC的关键技术包括首创的大视场高精度几何定标技术,多中心投影影像外视场五分之一像元级的影像拼接技术,首次研制的高精度数字航空影像获取飞行控制器,新型云台稳定、内置检影、电动旋像等装置。广泛应用于国家基础测绘、国土资源调查、应急救灾等领域,开创了中国数字航空摄影新时代。

On the base of triangle photogrammetry, using vidicons is studied on to locate aircrafts by three dimentional intersection, ratiocinated the mathematical model of aircraft location and its least square solution. Considering the aircrafts＇ fight characteristics, a subarea relay measurement system was gived and successfully used to measure the fight path of aircrafts during the taking off and landing period. In order to optimize the calculation of the minimum distance betweeen prediction point and flight path, a search and approach method based on changea- ble time step was gived according to the time continuity of data. The experiments indicate that the aircraft location and flight path measurment based on videogrammetry is feasible and stabilized which can be used as complementarity of airborne GPS, the search and approach method based on changeable time step can greatly reduce the workload and improve efficiency.