Live coverage: SpaceX Falcon 9 rocket lifts off on first SDA mission

Six months after sending one of its communications satellites to orbit on the first re-flight of a SpaceX rocket, SES intends to launch a hybrid television broadcasting satellite owned in partnership with EchoStar on another previously-used Falcon 9 rocket from Florida’s Space Coast as soon as late September, industry officials told Spaceflight Now.

SpaceX’s first upgraded Cargo Dragon spaceship departed the International Space Station Tuesday morning with more than 4,400 pounds of research specimens and other equipment, heading for splashdown Wednesday night in the Gulf of Mexico off the west coast of Florida.

A spaceship designed to ferry astronauts into orbit by 2017 is set for a major test Wednesday, when SpaceX plans to blast the capsule away from Cape Canaveral on a mile-high demo flight to simulate the craft’s ability to protect occupants in the event of a catastrophic rocket mishap on the pad.