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This invention proposes a navigation system for drones that uses light instead of satellite signals like GPS. Imagine ground stations, similar to cell towers, that project focused beams of light, each covering a specific area. As a drone flies through these light 'cells,' it receives navigation instructions encoded within the light, using special codes to guide it along a predetermined path, creating a kind of invisible highway in the sky.
Why it matters: The rapid growth in drone traffic and urban air mobility since 2016 has created a strong demand for precise, secure, and GPS-independent navigation systems. Advancements in free-space optical communication and drone traffic management make this photonic "virtual highway" concept more viable and relevant now.
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