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. 2023 Dec 1;9(48):eadj5873. doi: 10.1126/sciadv.adj5873

Table 2. Satellite-to-ground QKD link parameters.

Parameter Value
Orbit inclination ϕ (°) and altitude horbit (km) 90 and 500
Orbits with maximum satellite elevation αmax (°) 90°, 60°, 45°, 30°
QKD full beam divergence θ (μrad) 17.2
Atmospheric transmissivity (ηλ) at 843.9 nm 0.5
PAT system accuracy εpat (μrad) 3
Transmitter telescope aperture (diameter) (m) 0.1
Receiver telescope aperture (diameter) (m) 0.6
Receiver telescope obstruction (%) 30
QKD source wavelength (nm) 843.9