Chinese spacecraft begin rendezvous and proximity operations in geostationary orbit

China’s Shijian-21 and Shijian-25 are conducting proximity operations for a second time high above the Earth as a precursor to an expected on-orbit refueling test. Shijian-21 and Shijian-25 spacecraft, operating in geostationary orbit (GEO), approximately 35,786 km above Earth’s equator, appeared to come together June 30, according to optical ground tracking from S2a systems, a Swiss company which develops and operates customized systems for optical space surveillance worldwide. More

(Source: SpaceNews - Jul 1)