Avionic for Low Altitude High Density SUAS — Dynamic Configurable Dual ADS-B with Interrogation Flight Safety in the NAS consists of multiple layers — Flight Planning, routing, Radar coverage, transponder coverage, and Dual band ADS-B are examples. This proposal will focus on optimization of the existing active RF Dual band ADS-B and transponder system for use with anticipated large numbers of SUAS. SUAS will often be operating in areas and at altitudes that will not be visible to the existing FAA infrastructure. They will also have much higher densities of aircraft than the current infrastructure can handle. This Proposal will investigate the use of very small software defined transceiver technology (under 1 oz) tri-band avionics that include the ability to receive full UAT including ADS-B, ES ADS-B, and Mode A,C, and S transponder responses that can keep track of all transmitting aircraft. The SUAS will also transmit low power UAT ADS-B with dynamically configurable time slots allowing very high density of SUAS. Included will also be the use of a low power —all call— interrogator when the operational area is not already interrogated by a local source.