黑河生态水文遥感试验：天姥池小流域机载激光雷达DEM点云数据

2012年7月25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）。上游天姥池飞行区域，绝对航高为4800米，平均点云密度为1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 25, 2012, a lidar airborne remote sensing flight test was conducted in the core observation area of the middle and upper reaches of the Heihe River using a Y-12 aircraft equipped with the Leica ALS70 lidar sensor. The Leica ALS70 has a laser wavelength of 1064 nanometers and supports multiple echo returns, including the 1st, 2nd, 3rd, and last returns. For the upstream Tianmuchi flight area, the absolute flight altitude was 4800 meters, with an average point cloud density of 1 point per square meter. Through procedures including parameter calibration, automatic point cloud classification and manual editing, DEM (Digital Elevation Model) and DSM (Digital Surface Model) data products were finally generated.