A 2-watt laser on a geostationary satellite delivered a 1 Gbps downlink to Earth from 36,000 km away. The AO-MDR system combines Adaptive Optics and Mode Diversity Reception to overcome atmospheric turbulence. The ground receiver used an 1.8-meter telescope with a 357-actuator deformable mirror to correct wavefront distortions. After AO correction, the beam was split…
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