Long-Distance Altimetry and Terrain Relative Navigation Capabilities of a Multi-Functional Imaging Lidar for Precision Safe Landing

A linear-mode flash lidar sensor employing a resolution enhancement algorithm is being developed at NASA Langley Research Center for enabling precise and safe landing on the Moon, Mars, and other destinations in the solar system. This lidar, referred to as Terrain Sensing Lidar (TSL), is a multi-mode sensor capable of hazard detection and avoidance, terrain relative navigation, and long-distance altimetry. TSL offers a solution for future missions that require landing in rough terrain and/or poor lighting conditions. The viability of TSL for terrain hazard detection and avoidance has already been demonstrated by conducting drone and helicopter flight tests. An upgraded version of this lidar has been recently assembled for additional aircraft flight tests to demonstrate its multi-mode capability including long-distance altimetry and terrain relative navigation.