The Department of Defense, specifically the Army, is seeking innovative solutions through the Small Business Innovative Research (SBIR) program for the development of a passive detection, tracking, and identification system for unmanned aerial systems (UAS) targeting ground vehicles. The primary objective is to create a system that utilizes passive sensors to detect, track, and identify drones based on their radio frequency transmissions and other signatures, with a focus on low power consumption and the ability to operate effectively in various environments, including urban settings. This initiative is critical for enhancing military capabilities against drone threats and aims to deliver a prototype system by the end of Phase II, with key milestones including performance assessments and compliance evaluations. The solicitation is currently closed, with the next phase opening on June 26, 2024, and applications due by July 30, 2024. For more information, interested parties can visit the official SBIR website at https://www.dodsbirsttr.mil/topics-app/.