黑河生态水文遥感试验：黑河流域中游核心试验区机载激光雷达DEM点云数据（2012年7月19日））

2012年7月19日，在黑河中上游的核心观测区域，利用运12飞机，搭载Leica公司ALS70,开展了lidar航空遥感飞行试验。ALS70激光波长为1064纳米，多次回波（1,2,3和末次）。中游地区飞行相对高度1500米（海拔高度2700米)，平均点云密度4点/平方米。通过参数检校、点云自动分类和人工编辑等步骤，最终形成DEM和DSM数据产品。

On July 19, 2012, an airborne LiDAR remote sensing flight experiment was conducted in the core observation zone of the upper and middle reaches of the Heihe River. A Y-12 aircraft equipped with the Leica ALS70 LiDAR system was used for the experiment. The ALS70 has a laser wavelength of 1064 nm and supports multiple echo returns including the 1st, 2nd, 3rd, and last returns. The relative flight altitude over the middle reaches was 1500 meters (corresponding to an elevation of 2700 meters), with an average point cloud density of 4 points per square meter. Finally, DEM (Digital Elevation Model) and DSM (Digital Surface Model) data products were generated via procedures such as parameter calibration, automatic point cloud classification, and manual editing.