The Department of Defense, specifically the United States Air Force, is seeking innovative solutions to detect uncrewed aircraft systems (UAS) operating in cluttered environments, as outlined in the SBIR opportunity titled "Detection of Uncrewed Aircraft Systems in Cluttered Environments." The objective is to develop effective sensor technologies capable of autonomously identifying small UAS threats that fly low to the ground and are obscured by obstacles such as trees and buildings, with a focus on achieving at least 80% detection effectiveness and minimizing false alarms. This initiative is critical for enhancing air defense capabilities at military installations, particularly as UAS technology evolves and poses new challenges. Interested parties should note that the opportunity will be open for applications from May 28, 2025, to June 25, 2025, with further details available at the provided source link.