Update 11:15 AM EST: SpaceX has scrubbed the mission for today, and will look to try again tomorrow during a three-hour launch window that opens at 9 AM EST. There was an unusually high pressure reading in the upper stage liquid oxygen tank that the company will work to resolve.
SpaceX is launching a Falcon 9 today from Kennedy Space Center, with a launch window that spans three hours and opens at 9 AM EST (6 AM PST). The mission will carry a spy satellite for the U.S. National Reconnaissance Office (NRO), and will include a recovery attempt for the first-stage booster used on the Falcon 9 vehicle.
This Falcon 9’s first stage has already flown four times previously, including during two of SpaceX’s commercial resupply missions to the International Space Station for NASA, and during a Starlink launch, as well as for SAOCOM 1B, a satellite launch operation for the Argentinian space agency in August.
SpaceX will be attempting a landing back at its landing pad at Cape Canaveral Space Force Station, a rarer occurrence vs. its use of its two drone landing ships positioned out in the ocean. SpaceX’s at-sea launches were introduced to allow for recovery of rocket boosters that didn’t have enough fuel remaining on board to make it all the way back to land – meaning this NRO mission’s parameters allow for a ‘return to sender’ trip back home.
Typically, when there’s a longer launch window, SpaceX will aim to launch at the beginning, depending on weather conditions. If that’s the case today, the stream above should begin at around 8:45 AM EST (15 minutes prior to the opening of the window).
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December 17, 2020 at 11:18PM
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Watch SpaceX launch a U.S. spy satellite live and bring its booster back for a landing on terra firma - TechCrunch
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