The Department of Homeland Security (DHS) Small Business Innovation Research (SBIR) Program awarded $750,000 to Texas-based small business Cobalt Solutions Inc. to develop a detection and tracking sensor system that can identify nefarious small unmanned aerial vehicles (UAV) in an urban environment. The DHS SBIR Program selected Cobalt Solutions Inc. for a Phase II award after they successfully demonstrated the feasibility of their 5G Passive Radar UAS Tracking and Targeting (5G-PRT) sensor system.