A Chinese Yaogan 16 satelltie and two sub-satellites which are assessed to be a constellation of three satellites conducting an Electronic Intelligence mission with a possible Naval Ocean Surveillance capability, were launched via a Long March 4C on 25 November, at 0406 GMT from the Jiuquan launch facilty in China.
The main satellite was built by China Aerospace Science and Technology Corp (CAST) and is believed to have been built around the CAST 2000 bus design.