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A United Launch Alliance Delta II rocket launched the Joint Polar Satellite System-1 weather satellite for NASA and NOAA from Vandenberg Air Force Base in California on Saturday, Nov. 18, at 4:47 a.m. EST (0947 GMT) following two delays. The JPSS-1 satellite is an advanced next-generation weather satellite to boost forecast accuracy. Refresh this page for the latest on the mission.

Main Story: First-of-Its-Kind Satellite Launches to Track Earth's Weather Like Never Before

In Photos: The Advanced JPSS-1 Weather Forecasting Satellite's Earth Mission

NASA Press Release 

"The Joint Polar Satellite System-1 (JPSS-1) satellite, the first in a new series of four highly advanced National Oceanic and Atmospheric Administration (NOAA) polar-orbiting satellites, now is scheduled to launch on Tuesday, Nov. 14, from Vandenberg Air Force Base, California. "Liftoff aboard a United Launch Alliance Delta II rocket from Space Launch Complex 2 is targeted for 4:47 a.m. EST (1:47 a.m. PST). Launch coverage will begin on NASA Television and the agency's website at 4:15 a.m.

"JPSS represents significant technological and scientific advancements in observations used for severe weather prediction and environmental monitoring. JPSS is a collaborative effort between NOAA and NASA. The JPSS system will help increase weather forecast accuracy from three to seven days." "NASA TV live launch coverage will begin at 4:15 a.m. EST on Nov. 14 and conclude after the CubeSat deployment. There is no planned post-launch news conference. A post-launch news release will be issued as soon as the state-of-health of the spacecraft can be verified."

TBD: SpaceX Zuma Launch

The private spaceflight company SpaceX aims to launch a Falcon 9 rocket carrying the secret Zuma payload for the U.S. government  in a mission that will lift off from Pad 39A of NASA's Kennedy Space Center in Florida. Liftoff is set for some time between 8 p.m. and 10 p.m. EST (0100-0300 GMT), but the launch date is uncertain.

Here's What We Know About the Secret Zuma Payload SpaceX Is Launching

SpaceX Launch of Mysterious Zuma Spacecraft Delayed Until Friday

SpaceX Delays Launch of Secret Zuma Mission to Thursday

SpaceX Rocket to Launch Secret Zuma Mission Thursday Night 

Little is known about the Zuma mission other than the payload will be used by the U.S. goverment and is destined for a low-Earth orbit, rather than geosynchronous orbit. Aerospace and defense company Northrop Grumman arranged the Zuma launch on a SpaceX Falcon 9 for the U.S. government. 

This mission will mark SpaceX's third classified launch of 2017. The company launched its first classifed payload in May (a spy satellite for the National Reconnaissance Office) and followed up in September with the launch of a U.S. Air Force X-37B space plane on its classified OTV-5 mission.

SpaceX Mission Overview (view PDF):

"SpaceX’s Falcon 9 rocket will deliver the Zuma spacecraft to low-Earth orbit. SpaceX is targeting launch of the Zuma spacecraft from Launch Complex 39A (LC-39A) at NASA’s Kennedy Space Center, Florida. The two-hour primary launch window opens at 8:00 p.m. EST on Thursday, November 16, or 1:00 UTC on Friday, November 17.

"A backup two-hour launch window opens at 8:00 p.m. EST on Friday, November 17, or 1:00 UTC on Saturday, November 18. Following stage separation, Falcon 9’s first stage will attempt to land at SpaceX’s Landing Zone 1 (LZ-1) at Cape Canaveral Air Force Station, Florida."

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