Control terminal and system and method for simultaneously pointing to two ground stations by satellite-ground double optical paths

Abstract

The invention provides a control terminal and a system and method for simultaneously pointing to two ground stations by satellite-ground double optical paths. The method includes: enabling a secrete key communication equipment to point to a first ground station; calculating an azimuth angle and a pitch angle, under a load equipment coordinate system, of a two-dimensional rotating plate on an entanglement emitter which points to a second ground station; setting the two-dimensional rotating plate according to the azimuth angle and the pitch angle, under the load equipment coordinate system, of the two-dimensional rotating plate so as to enable the entanglement emitter to point to the second ground station under drive of the two-dimensional rotating plate. The control terminal and the systemand method for simultaneously pointing to the two ground stations by the satellite-ground double optical paths have advantages that high-precision satellite-ground alignment is realized through the double optical paths pointing to the two ground stations so as to meet effective quantum communication demands of satellites, and effectiveness of quantum satellite in-orbit experiments is guaranteed.

Description

technical field [0001] The invention relates to the technical field of quantum satellites, in particular to a method, system, and control terminal for simultaneous pointing of satellite-ground dual optical paths to ground dual-stations. Background technique [0002] In the prior art, radio or visible light is usually used to capture or align the aircraft and the ground station, and the pointing accuracy usually achieved is not high, about 0.3-0.5 degrees. This kind of precision can be achieved only by adopting classical methods. [0003] For quantum science experimental satellites, the satellite-ground alignment accuracy is required to reach 3.5u radians, which cannot be achieved by classical methods. Therefore, how to align the satellite with high precision has become one of the technical problems to be solved urgently. Contents of the invention [0004] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a me...

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Problems solved by technology

[0003] For quantum science experiment satellites, the satellite-ground alignment accuracy is required to reach 3.5u radians, which cannot be achieved by classical methods

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