Watch SpaceX Rocket Launch Online, Live Stream of Air Force Satellite Deployment

A SpaceX launch that was delayed twice earlier in the week and then rescheduled expected to take place Saturday morning from Cape Canaveral Air Force Station, Florida. SpaceX will use one of its Falcon 9 rockets to launch the United States Air Force's first Global Positioning System III space vehicle

The launch was originally scheduled for Tuesday and was scrubbed "due to an out of family reading on first stage sensors," according to SpaceX. The company originally was aiming to launch the rocket the following day on Wednesday during the launch window but again scrubbed the launch due to the sensors. The payload of the rocket is a satellite for the United States Air Force set to begin to upgrade a GPS in space.

Following that second scrub, the company moved the launch to Saturday morning. The window opens up at 8:55 a.m. EST and the stream from the launch begins about 15 minutes before that, so around 8:40 a.m. EST Saturday morning.

spacex on launch complex 40 2012
Surrounded by four lightning suppression system towers, the SpaceX Falcon 9 rocket stands at Space Launch Complex-40 on Cape Canaveral Air Force Station in Florida in May 2012. NASA/Jim Grossmann

The launch is scheduled to happen from Space Launch Complex 40, also known as SLC-40, where the rocket has been, ready to launch while the SpaceX crews do the final checks. Both the vehicle and the payload were healthy said SpaceX despite the need to check the sensors before the launch.

Thursday SpaceX shared a video of inclement launch weather and the rocket and payload on the launch pad.

Standing down today due to weather. Vehicle and payload remain in good health. Working toward the next best launch opportunity; will announce a new launch date once confirmed on the Range.

— SpaceX (@SpaceX) December 20, 2018

As of Thursday, the weather was 80 percent favorable for the launch window Saturday morning. If the weather held the launch would likely go off without a hitch.

After the payload launches the satellite being deployed is expected to deploy about an hour and 56 minutes later to medium Earth orbit. SpaceX won't make an attempt to recover the first stage of the rocket after the launch due to the mission requirements.

SpaceX also shared the first photos of the completed Crew Dragon craft that's expected to first launch in January as part of an unmanned demonstration mission ahead of crewed missions. NASA and SpaceX are working together as part of the commercial crew program to help bring launches of U.S. astronauts back to American soil. The earliest crewed launches are expected during the summer of 2019.

The live stream of the launch is expected to be available on YouTube as well as on the SpaceX website and below: