Performance optimization of tethered balloon technology for public safety and emergency communications | SpringerLink
Airbus tests high altitude balloon for military communications | Aerospace Testing International
Large Chinese reconnaissance balloon spotted over the US, officials say - ABC News
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Chinese Balloon Had Tools to Collect Electronic Communications, U.S. Says - The New York Times
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On the design and development of flying BTS system using balloon for remote area communication | Semantic Scholar
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Why We're Suddenly Spotting Spy Balloons - Scientific American
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