From the video description: "Northrop Grumman video showing its Proteus manned test aircraft (left) and a NASA Global Hawk unmanned aircraft (right) conducting the first simulated autonomous aerial refueling at high altitude. Proteus (acting the the tanker) and the Global Hawk (as the receiver - its the reverse of the normal way) flew as close as 40ft apart at an altitude of 45,000ft in a risk-reduction flight for the US Defense Advanced Research Projects Agency's KQ-X program. Wake turbulence between the aircraft as well as engine performance and flight control responsiveness in the stratosphere were evaluated."
{via Robots.net}
Comments
Northrop Grumman is using AARD system of Sierra Nevada Corporation that 5 years ago demonstrated autonomous refueling when one of NASA's F/A-18B received fuel from a 707 tanker. All the equipment was installed in the F/A-18 and as you can see in the video the pilots have their hands over the dashboard during the refueling:
AARD uses differential GPS, INS and optical tracking. The goal is to have a few only tanker RQ-4 that will be able to refuel all the other Global Hawks. More info: Ares / robots.net / robotpig.net