Design and in-orbit test of a high accuracy pointing method in satellite-to-ground quantum communication | Zendy

Liang Zhang | Zendy; Jiansheng Dai | Zendy; Changkun Li | Zendy; Jincai Wu | Zendy; Jianjun Jia | Zendy; Jianyu Wang | Zendy

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Design and in-orbit test of a high accuracy pointing method in satellite-to-ground quantum communication

Author(s) -

Liang Zhang,

Jiansheng Dai,

Changkun Li,

Jincai Wu,

Jianjun Jia,

Jianyu Wang

Publication year - 2020

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.387011

Subject(s) - satellite , computer science , offset (computer science) , quantum information science , quantum , optics , remote sensing , communications satellite , ground track , satellite laser ranging , physics , laser , geostationary orbit , laser ranging , quantum mechanics , astronomy , quantum entanglement , programming language , geology

To meet the requirement of high-accuracy pointing of quantum signals in satellite-to-ground quantum communication, this paper proposes a flexible satellite-based pointing method that changes the fine tracking point to solve the problem from point-ahead angle and ground beacon laser offset. This method does not require the use of a point-ahead mechanism and can detect the pointing angle in real time. Detailed algorithms and analysis are given. The method has been verified in orbit on the quantum science satellite Micius. The satellite-to-ground test results show that the quantum signal pointing accuracy is between 0.5∼1.0 µrad, which meets the efficiency requirements of satellite-to-ground quantum communication.

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