Method for capturing, tracking and processing satellite optical communication

Abstract

The invention discloses a method for capturing, tracking and processing satellite optical communication. The method comprises the following steps: (1) capturing the field of view of a detector by a satellite so as to acquire the beacon light which is transmitted by an other-side telecommunication satellite laser load, and carrying out imaging on the beacon light so as to acquire the position of facula; (2) adjusting antenna according to the position of the facula so as to enable the facula to be positioned in a field of view with the pixel size of M*M; (3) adjusting the facula to be positioned in a field of view with the pixel size of N*N through quickly rotating a mirror to align with the facula; and (4) continuously detecting the position of the facula in the field of view of N*N, and returning to the step (3) when the facula skips out of the field of view with the pixel size of M*M. With the adoption of the method for capturing, tracking and processing the satellite optical communication, disclosed by the invention, the high-accuracy computation for the facula can be realized under the condition of the astigmation and the halation of the facula, and the change of the optical communication link distance and the irregular circular spot of the facula, thus the establishment of capturing and tracking of the satellite optical communication can be rapidly and effectively realized.

Description

technical field [0001] The invention belongs to the field of satellite communication, and relates to a satellite optical communication capturing and tracking processing method. Background technique [0002] In satellite laser communication, it is first necessary to establish the tracking link and the establishment of the laser communication link. With existing technologies and devices, it is impossible to directly capture the communication signal beam with a width of 0.0017°, so a relatively wide beacon light is used for capture. Suppose the width of the beacon light is 600μrad, which is 0.0344°. Although the beam of the beacon light is wider than that of the signal light, 0.0344° is still a very small space angle for space capture. [0003] The capture and tow process is an important link in the transition from successful capture to tracking and communication. After the capture is successful, the laser communication terminal adjusts its own antenna and turns on the signa...

AI Technical Summary

Problems solved by technology

[0005] In the existing technology, more analysis has been done on the capture and tracking system, but there is no fast convergence method for capture and traction under the influence of spot irregularity, astigmatism and light intensity threshold

[0006] In the current satellite optical communication tracking implementation methods, such as the SILEX project in Europe and NASDA in Japan, there is no public information on the method of fast convergence of capture and traction under the influence of spot irregularity, astigmatism and light intensity threshold.

[0007] However, the center of gravity algorithm is used in the domestic satellite optical communication capture and spot processing method, and there is no improvement in the tracking spot processing method.

Images