The Northrop Grumman RQ-4 Global Hawk is an uncrewed (UAV) surveillance aircraft.It was initially designed by Ryan Aeronautical (now part of Northrop Grumman), and known as Tier II+ during development. The Global Hawk performs duties similar to that of the Lockheed U-2.The RQ-4 provides a broad overview and systematic surveillance using high-resolution synthetic aperture radar (SAR) and long …
: https://en.wikipedia.org/wiki/Northrop_Grumman_RQ-4_Global_Hawk