关于新一代激光雷达系统

New LIDAR System Equipped with a High Resolution

激光雷达系统配备有当今世界上最高分辨率的彩色数码相机和多光谱航拍相机。它同时集常用测量装置和全球定位装置于一身 ,当飞机机载该装置飞越地球表面时 ,它们能在获取所需图像及数据的同时 ,计算出传感器的精确位置和取向 ,给出数字高程图 (DEM)及全数码彩色影像。数码相机的底部配备着一个超大像幅的CCD传感器。该激光雷达系统还配置有一个高分辨率多光谱成形相机 ,因此多谱段像素直接与XYZ坐标值相对应 ,得以自动清晰地区分道路、建筑、树林。

The newly developed LIDAR (laser detection and ranging) system combined with the world highest resolution color digital camera (commercially available) and/or a hyperspectral imagery camera is described. It is also integrated with an Inertial Measurement Unit (IMU) and Global Positioning System (GPS). These systems are combined to calculate the exact position and orientation of the sensors as they relate to the earth's surface at the time of data acquisition. The need for ground control panels, tedious and expensive ground GPS measurements, film development and stereo plotting are unnecessary for DEM generation and image rectification. The digital camera sub system consists of a large format 4096×4096 pixel array with 8 bit dynamic range that can collect clear (smear free) imagery with better than 6 inch resolution at 240 kmph ground speed with its high speed shutter system. The camera system exceeds the USGS camera calibration specification. Moreover, it comes with a high resolution hyperspectral imagery camera, so multispectral pixels are now associated with individual XYZ values to discriminate between roads, buildings, trees, water and other features.