SpaceX continues to target a 9:21 a.m. Monday launch of a Falcon 9 rocket carrying six commercial satellites from Cape Canaveral Air Force Station.
Due to a range conflict, Wednesday will serve as the back-up launch date, satellite owner Orbcomm Inc. said in an update on its Web site.
Weather and technical problems scrubbed two attempts to launch the rocket last month and postponed a third try.
The mission aims to launch the first six of 17 satellites in a new constellation that will improve Orbcomm's machine-to-machine communications service.
After this mission, United Launch Alliance plans to launch military satellites from the Cape on July 23 and July 31.