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Table 1 Parameters of airborne QKD

From: Airborne quantum key distribution with boundary layer effects

Payload

Parameter

Description

Value

Aircraft

v

Flight speed

0.7 Ma

h

Relative flying height

10 km

\(\rho _{h}\)

Air density

0.413 kg/m3

d

The shortest horizon distance between the aircraft and the ground station

10 km

Photon Source

\(D_{T}\)

Diameter of the transmitter telescope

0.05 m

\(\delta _{T}\)

Transmitter pointing precision [22]

150 μrad

λ

Transmitter wavelength

1550 nm

\(\omega _{0}\)

Waist radius

0.0158 m

\(r_{0}\)

Fried parameter in zenith [50]

0.2 m

Ground station

\(D_{R}\)

Diameter of the receiver telescope

0.3 m

\(e_{d}\)

System detection error rate

1%

\(p_{d}\)

Dark count rate

2 × 10−6

\(\eta _{d}\)

Detector efficiency

15%

\(\eta _{s}\)

Receiving optical module efficiency

60%

Protocols

μ

Intensity of signal states

0.8

ν

Intensity of decoy states

0.1

N

System repetition rate

100 MHz

\(P_{s}\)

Probability of signal states

50%

\(P_{d}\)

Probability of decoy states

25%

\(P_{v}\)

Probability of vacuum states

25%