SMAPVEX19-22 Massachusetts Lidar Derived Digital Surface Model, Version 1

These digital surface model (DSM) data consist of surface elevations derived from source lidar measurements collected in August 2022 in the vicinity of Petersham, MA during the SMAPVEX19-22 campaign. The location was selected due to its forested land cover, as SMAPVEX19-22 aims to validate satellite derived soil moisture estimates in forested areas. The August collection period was selected to characterize ‘leaf-on’ conditions. DSM data represents the highest elevation of features on the Earth’s surface, which may include bare-earth, vegetation, and human-made objects.本数据集为数字地表模型（Digital Surface Model, DSM）数据，其地表高程信息源自2022年8月在马萨诸塞州皮茨汉姆（Petersham, MA）周边区域、SMAPVEX19-22科考项目期间采集的激光雷达（lidar）观测数据。该观测点位之所以被选定，是因其地表覆盖为森林植被，而SMAPVEX19-22项目的核心目标正是验证森林区域内卫星反演的土壤湿度估算结果。本次数据采集时段选定为8月，旨在表征植被处于展叶期（leaf-on）的地表状态。DSM数据反映地球表面各类地物的最高高程，涵盖裸地、植被以及人工设施等类型。