China’s experimental communication and navigation technology satellites Tiandu-1 and Tiandu-2 have successfully carried out experiments on new technologies such as high-reliability Earth-Moon transmission and routing, the Science and Technology Daily reported on Monday .

Telemetry data showed that the test design could effectively improve the spacecraft’s accuracy in determining its lunar orbit.

The two satellites were sent into space together with the Queqiao-2 relay satellite on March 20. They entered their designated circumlunar orbits on March 29 and separated on April 3.

On April 8, Tiandu-1 began flying in formation with Tiandu-2, remaining at a distance of about 200 kilometers. The two satellites operate in normal communication, stable attitude and energy balance.

They laid an important foundation for carrying out a series of communications technology test missions, according to the paper, noting that Tiandu-2 captured and sent joint Earth-Moon images to Earth.

Queqiao-2, Tiandu-1 and Tiandu-2 use a highly elliptical frozen lunar orbit as their target orbits. This type of orbit is stable, ensuring that the spacecraft travels with minimal trajectory deviation.


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