Changguang Satellite Technology Co., Ltd. (hereinafter referred to as Changguang Satellite) used a self-developed vehicle-mounted laser communication ground station to conduct a satellite-to-ground laser high-speed image transmission test with the "Jilin-1" constellation MF02A04 satellite-borne laser terminal and achieved success.It is reported that the "Jilin-1" constellation is the core project of Changguang Satellite under construction. As the spatial and temporal resolution of the constellation continues to improve, the amount of data it generates increases geometrically.
At the beginning of 2020, Changguang Satellite realized that the bandwidth of satellite-to-ground data transmission links had become a "stuck neck" problem restricting the downloading of massive data from satellites.Laser communication has become one of the best solutions for ultra-high-speed transmission of massive data due to its high bandwidth, low latency, and good security.
The laser communication ground station independently developed by Changguang Satellite adopts a vehicle-mounted configuration. It not only has the characteristics of high bandwidth and miniaturization, but can also be moved and deployed anywhere. Through the flexible change of the ground station site, it provides effective support for avoiding extreme weather and atmospheric turbulence. This feature will greatly improve the reliability and stability of satellite-to-ground laser data transmission.
According to the staff, the communication bandwidth of this satellite-to-ground laser image transmission test reaches 10Gbps, which is more than 10 times the bandwidth of traditional microwave data transmission.In the future, Changguang Satellite plans to expand this bandwidth to 40Gbps~100Gbps and deploy stations in many places across the country, which will greatly improve the efficiency of Jilin-1 remote sensing image data acquisition.
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