Photos: Atlas 5 rocket aims for International Space Station

SpaceX’s Falcon 9 rocket was poised for launch Wednesday at Cape Canaveral’s Complex 40 launch pad carrying more than 5,600 pounds of supplies and experiments to the International Space Station.

Rocket Lab launched a radar imaging satellite Tuesday for the Japanese company Synspective. The small Earth observation payload lifted off from New Zealand at 5:09 a.m. EST (1009 GMT) aboard an Electron rocket. Rocket Lab did not attempt to recover the Electron’s first stage on this mission.

A SpaceX Dragon supply ship packed with nearly three tons of experiments, crew provisions and supplies will remain on the ground until at least Friday morning to allow more time for NASA flight controllers to troubleshoot a problem with an electrical distribution unit on the International Space Station.