According to the official account of the "Institute of Optoelectronics Technology, Chinese Academy of Sciences", recently,The institute teamed up with Beijing University of Posts and Telecommunications and other units to achieve a milestone breakthrough in satellite-to-ground laser communication testing.Using a self-developed 1.8-meter laser communication ground station, the team successfully established a stable laser link with geosynchronous orbit satellites.
1.8m laser communication ground station
Achieve symmetrical two-way high-speed communication of 1 Gbps in uplink and downlink at the longest distance of 40740.96 kilometers.And set a record of rapid link establishment in 4 seconds and uninterrupted link maintenance for more than 3 hours.
This marks that my country has successfully opened up an uplink and downlink symmetrical 1Gbps real-time transmission channel in the field of high-orbit satellite-to-ground laser communications.
Ground station and satellite link establishment process
It has systematically overcome the engineering problems of high-speed two-way interaction and long-term stability at ultra-long distances, taking a key step towards building a future integrated network of space and ground.
The institute stated that this test pushed the stable communication duration from minutes to hours (>3 hours) on a more challenging high-orbit platform, and ensured that both upstream and downstream channels have 1Gbps real-time traffic capabilities.
This means that the satellite can not only download data at high speed, but also receive complex instructions in real time.It lays the foundation for the upgrade of high-orbit satellites from data relay stations to intelligent processing hubs.