TJS 4 
TJS 4 (Tongxin Jishu Shiyan) is a Chinese satellite of unknown purpose.
Reportedly the satellite was built by CAST and is a technological demonstration of multi-band, high speed communication techniques. The launch animation showed a satellite featuring a deployable mesh antenna and a number of smaller antennas, hinting to a SIGINT mission.
The satellite was launched in October 2019 into a geostationary transfer orbit.
|Type / Application:||?|
|Power:||solar arrays, batteries|
|TJS 4||2019-070A||17.10.2019||Xi LC-3||CZ-3B/G3|