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# TableÂ 1 Parameters of airborne QKD

From: Airborne quantum key distribution with boundary layer effects

Payload | Parameter | Description | Value |
---|---|---|---|

Aircraft |
| Flight speed | 0.7Â Ma |

| Relative flying height | 10Â km | |

\(\rho _{h}\) | Air density | 0.413Â kg/m | |

| The shortest horizon distance between the aircraft and the ground station | 10Â km | |

Photon Source | \(D_{T}\) | Diameter of the transmitter telescope | 0.05Â m |

\(\delta _{T}\) | Transmitter pointing precisionÂ [22] | 150Â Î¼rad | |

| Transmitter wavelength | 1550Â nm | |

\(\omega _{0}\) | Waist radius | 0.0158Â m | |

\(r_{0}\) | Fried parameter in zenithÂ [50] | 0.2Â m | |

Ground station | \(D_{R}\) | Diameter of the receiver telescope | 0.3Â m |

\(e_{d}\) | System detection error rate | 1% | |

\(p_{d}\) | Dark count rate | 2â€‰Ã—â€‰10 | |

\(\eta _{d}\) | Detector efficiency | 15% | |

\(\eta _{s}\) | Receiving optical module efficiency | 60% | |

Protocols |
| Intensity of signal states | 0.8 |

| Intensity of decoy states | 0.1 | |

| System repetition rate | 100Â MHz | |

\(P_{s}\) | Probability of signal states | 50% | |

\(P_{d}\) | Probability of decoy states | 25% | |

\(P_{v}\) | Probability of vacuum states | 25% |