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 |