This paper presents an idea-phase introduction of a tactical level communication system (battalion and below). The introduced communication system utilizes Unmanned Aircraft Systems to ensure the message throughput and to receive and transmit large quantities of data requiring wide bandwidth. The introduced communication system enables utilizing different waveforms and frequencies when communic...

To operate in civil airspace, unmanned aircraft systems (UAS) are expected to maintain safe separation from other aircraft. Self-separation and Collision Avoidance Systems (CAS) designed for unmanned aircraft are under development to meet this requirement. To maintain airspace safety, these systems must interoperate safely with CAS onboard manned aircraft. Whereas manned aircraft CAS such as TC...

This paper proposes a switching adaptive control for trajectory tracking of unmanned aircraft systems. The switching adaptive control method is designed to overcome the wind disturbance and achieve a proper tracking performance for control systems. In the suggested system, the wind disturbance is regarded as a finite set of uncertainties; a controller is designed for each uncertainty, and a per...

The ability to understand and predict the dynamic behavior of our planet’s environment over multiple spatial and time scales remains an outstanding challenge for science and engineering (National Research Council 2007). For the past 35+ years, sensors on spaceborne platforms have increasingly surveilled most of the Earths surface and atmosphere. However, a summary of US severe weather data over...

In order to provide for the safe integration of unmanned aircraft systems into the National Airspace System, the control and non-payload communications (CNPC) link connecting the ground-based pilot with the unmanned aircraft must be highly reliable. A specific requirement is that it must operate using aviation safety radiofrequency spectrum. The 2012 World Radiocommunication Conference (WRC-12)...

The integration of unmanned aircraft into the national airspace system requires new methods of ensuring collision avoidance. For unmanned aircraft a capability to ‘detect-and-avoid’ is required to replace the traditional ‘see-andavoid’ performed by pilots. The initial results from testing a Mobile Aircraft Tracking System (MATS) show that this ground-based radar system can track a ScanEagle unm...