An automated terrestrial laser scanning system (A-TLS) designed and built by researchers from the U.S. Army Engineer Research and Development Center’s Cold Regions Research and Engineering Laboratory (CRREL) takes scans of the landscape on Husky Drop Zone on Eielson Air Force Base, Alaska. The A-TLS is installed on a 12-foot-tall tower affixed with multiple lidar laser scanners, meteorological sensors and solar panels and was designed and built by CRREL. The system will help determine how underground permafrost changes the landscapes above capturing precise lidar scans which can detect any gradual caving or sinking of the surface area as a means of assessing and validating satellite-based assets for continuous monitoring of permafrost environments globally and will be taking scans of the Alaskan tundra until October 2022. (U.S. Army Corps of Engineers Photo by Adam LeWinter)