SpaceX lining up two Falcon 9 launches and landings in ten hours

SpaceX appears to be on track to attempt two separate Falcon 9 launches and landings within the same ten-hour, also marking the company’s 14th Starlink mission this year and first West Coast launch in a year and a half.

After overcoming a range of minor issues, replacing two Falcon 9 booster engines, effectively reactivating a dormant orbital launch complex, and doing all of the above to a standard capable of satisfying NASA’s strict expectations, SpaceX is officially set to launch the Sentinel 6A oceanography satellite no earlier than (NET) 9:17 am PST (16:17 UTC) Saturday, November 21st. The twist: Falcon 9 will be launching from Vandenberg Air Force Base (VAFB), California for the first time since June 2019.

Meanwhile, back on the East Coast, SpaceX has successfully completed Crew Dragon’s operational astronaut launch debut, clearing the company to focus on its third November mission – Starlink V1 L15. Set to be SpaceX’s 14th dedicated Starlink launch in 2020 alone, Starlink-15 is currently scheduled to lift off NET 10:17 pm EDT (03:17 UTC) on November 21st – coincidentally exactly ten hours of Falcon 9’s Sentinel 6A launch.

Static fire test complete – targeting Saturday, November 21 for Falcon 9 launch of the Sentinel-6 Michael Freilich mission and landing at SLC-4 at Vandenberg Air Force Base in California

— SpaceX (@SpaceX) November 17, 2020

Of Course I Still Love You droneship, towed by Tug Hawk, expected to depart for the next Starlink mission later today or tomorrow! https://t.co/2AQgqv6ag2

— Gavin – SpaceXFleet.com (@SpaceXFleet) November 17, 2020

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SpaceX’s Sentinel 6A launch will debut new Falcon 9 booster B1063, first spotted on its way from the company’s McGregor, Texas test facilities to VAFB in late August. Unfortunately, when Falcon 9 booster B1062 suffered a last-second abort on October 2nd, the Merlin 1D booster engine issue ultimately deemed responsible for the anomaly was also traced back to B1061 and B1063.

Falcon 9 booster B1063 was spotted on its way west from McGregor, Texas to Vandenberg Air Force Base, California in August. (D. Stamos)

As a result, SpaceX chose to replace an average of two Merlin 1D engines on each of the three boosters in a process that took several weeks. Additional difficulty was added due to the fact that all three new boosters were assigned to high-profile missions for exceptionally strict NASA and US military customers, necessitating extra caution and verification. Regardless of the hurdles, SpaceX managed to complete an entire complex rocket engine anomaly investigation in less than six weeks, determining the root cause, replicating the failure mode with individual engine static fires, replacing multiple engines on multiple boosters, and recertifying all three boosters for their respective flights.

Falcon 9 B1062 successfully launched the US military’s GPS III SV04 satellite on November 5th, followed by Falcon 9 B1061’s flawless four-astronaut launch on November 15th. Of the three impacted boosters, only B1063 remains and is scheduled to launch just four days from now. Barring surprises, all three will likely support one or several dozen more launches in the coming years.

Falcon 9 booster B1061 lifts off with four astronauts aboard. (Richard Angle)

Falcon 9 booster B1062 lands aboard drone ship OCISLY after a flawless launch debut. (SpaceX)

Meanwhile, SpaceX’s November 21st Starlink-15 launch is expected to feature Falcon 9 B1049 in what will become the first time the same rocket booster flies for the seventh time. In essence, if successful, Starlink-15 will effectively mean that SpaceX is 70% of the way towards achieving its longstanding goal of ten launches per booster.

Falcon 9 B1049 launched and landed for the sixth time on August 18th. (Richard Angle)

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