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7. PHASA-35
Stratospheric drone technology has a breakthrough in the PHASA-35, Persistent High-altitude Solar Aircraft. Designed by BAE Systems and Prismatic, this solar-powered platform can run in the stratosphere for up to a year. The 35-meter wingspan of the aircraft supports very effective solar cells to run its electric motors and charge its batteries for nighttime operation. PHASA-35, with a 15 kilogramme payload capacity, can assist several tasks from maritime surveillance to catastrophe monitoring. Its creative design lets one quickly implement it with minimum maintenance demands.
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