High Altitude Long Endurance vehicle (HALE), Persistent High Altitude Solar Aircraft (PHASA)- 35has the potential to remain airborne for a year is the First ever long endurance solar-powered unmanned aircraft which has successfully completed its maiden test flight and it developed by BAE systems in collaboration with Prismatic Ltd. About Phasa-35: PHASA-35 is an alternative to satellite having all the qualities of an aircraft, and it remains airborne within the stratosphere but above the weather and conventional air traffic level.
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