SYDNEY, Australia – Yesterday, the China National Space Agency (CNSA) contacted NASA about a potential on-orbit collision. The CNSA message read, “We would like to recommend you hold still and we’ll do the maneuver,” Alvin Drew, NASA Space Sustainability director and former astronaut, said Oct. 2 at a panel on space sustainability at the International Astronautical Congress here. “SpaceX also has been contacted by a Chinese constellation.”Recent action by CNSA and commercial satellite operators to discuss spacecraft maneuvers “tells me there is a coordinated signal coming from someone in China,” Drew said. Chinese companies plan to establish the 13,000-satellite Guowang internet-of-things constellation and the 15,000-satellites Qianfan or Thousand Sails broadband constellation. “Although we’re making progress, for years our ability to communicate with the Chinese National Space Agency has been extremely crude,” Drew said.