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Used SpaceX Rocket Launches 10 Iridium Satellites into Orbit

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Posted in Science on 31st Mar, 2018 03:59 AM by Alex Muller

A used SpaceX Falcon 9 rocket launched 10 new satellites into orbit March 30 in a morning liftoff that also marked an anniversary for reusable rockets.
The Falcon 9 rocket launched the fifth set of Iridium Next satellites exactly one year to the day after SpaceX's first used Falcon 9 rocket launch and landing.

 

Since then, SpaceX has commonly landed the first stage of its two-stage Falcon 9 rockets and reused them on later flights.

 

In fact, the booster that launched today's Iridium-5 mission also launched 10 other Iridium Next satellites on Oct. 9 during SpaceX's Iridium-3 mission. And last December, Iridium became the first SpaceX customer to launch a mission on a rocket it used before when the Iridium-4 mission launched with the same booster SpaceX used to launch 10 other satellites on its Iridium-2 flight in June 2017.

 

"Today, this is our fifth launch for the Iridium constellation, using only three rockets," SpaceX materials engineer Michael Hammersley said during live commentary.

 

A used SpaceX Falcon 9 rocket launched 10 new communications satellites into orbit from California's Vandenberg Air Force Base today (March 30) in a morning liftoff that also marked an anniversary for reusable rockets.


The Falcon 9 rocket, which first flew in October 2017, launched the fifth set of Iridium Next satellites for Iridium Communications at 10:13 a.m. EDT (1413 GMT), exactly one year to the day after SpaceX's first used Falcon 9 rocket launch and landing. Since then, SpaceX has commonly landed the first stage of its two-stage Falcon 9 rockets and reused them on later flights.

 

In fact, the booster that launched today's Iridium-5 mission also launched 10 other Iridium Next satellites on Oct. 9 during SpaceX's Iridium-3 mission. And last December, Iridium became the first SpaceX customer to launch a mission on a rocket it used before when the Iridium-4 mission launched with the same booster SpaceX used to launch 10 other satellites on its Iridium-2 flight in June 2017.

 

"Today, this is our fifth launch for the Iridium constellation, using only three rockets," SpaceX materials engineer Michael Hammersley said during live commentary.

 

If that sounds like a lot of launches for Iridium to you, you're not wrong. Iridium has tapped SpaceX to launch 75 Iridium Next satellites to build up its communications constellation in orbit. To do that, Iridium has bought eight Falcon 9 launches for a total of $536 million.

 

In one departure from typical SpaceX launches, the company cut the live video feed from the Falcon 9 second stage about 9 minutes into the flight.

 

"Due to some restrictions from the National Oceanic and Atmospheric Administration, NOAA for short, SpaceX will be intentionally ending live video coverage from the second stage just prior to engine shutdown," Hammersley said. "We're working with NOAA to address these restrictions in order to hopefully be able to bring you live views from orbit in the future."

 

Those restrictions apparently have to do with SpaceX's rocket camera video qualifying as a remote sensing system for Earth observation, which may require a NOAA license. NOAA officials said via Twitter that they are looking into the situation.

 

The 10 Iridium Next satellites were scheduled to be deployed about 42 minutes after reaching orbit, bringing Iridium's constellation up to 50 satellites. SpaceX launched the first 10 Iridium Next satellites in January 2017, with three more missions following in June, October and December of that year. The entire constellation of Iridium Next satellites (which includes 66 operational satellites and nine in-orbit spares) should be in orbit by mid-2018 if SpaceX's current launch pace holds.


Tags: spaceSpaceXrockethardwaresatellite

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