The British company BAE Systems has completed tests in the United States of the PHASA-35 stratospheric UAV. During the tests, PHASA-35 rose to an altitude of just over 20 km and spent 24 hours there. The PHASA-35 UAV systems are powered by solar panels, so it can stay in the sky for as long as possible without the need to land to charge the batteries, theoretically even a year. The UAV is capable of serving as a kind of “flying base station” for mobile operators, helping to cover hard-to-reach places with cellular network signals and 5G Internet, and the drone will also help establish communications in areas of natural disasters. The drone can also be used for military purposes by equipping it with reconnaissance equipment. Due to its high flight altitude, not all air defense systems will be able to hit the drone. The PHASA-35 UAV weighs only 150 kg, has a wingspan of 35 meters and can carry a 15 kg payload.