Jordan Hodge and Aaron Kehl, two mechanical engineers with the U.S. Army Engineer Research and Development Center’s Cold Regions Research and Engineering Laboratory, assemble a newly engineered automated terrestrial laser scanning system (A-TLS) on a 12-foot-tall tower affixed with multiple lidar laser scanners, meteorological sensors and solar panels to map where components go prior to the tower being disassembled and shipped to Alaska. The system will help determine how underground permafrost changes the landscapes above by 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 David Marquis)