Liftoff of SpaceX Falcon 9 on June 25 at 1:25 p.m. PDT (4:25 p.m. EDT) carrying ten Iridium Next mobile voice and data relay communications satellites to low Earth orbit on the Iridium-2 mission from Vandenberg Air Force Base in California. Credit: SpaceX
KENNEDY SPACE CENTER, FL - With Sunday's successful Falcon 9 blastoff for Iridium Communications joining rocketry's history books, Elon Musk's SpaceX accomplished a double headed American space spectacular this weekend with 2 launches and 2 booster landings in 2 days from 2 coasts for 2 commercial customers - in a remarkably rapid feat that set a new launch turnaround record for SpaceX.
On Sunday, June 25 at 1:25 p.m. PDT (4:25 p.m. EDT; 2025 UTC) a SpaceX Falcon 9 rocket successfully launched a second set of ten Iridium Next mobile voice and data relay communications satellites to low Earth orbit on the Iridium-2 mission from Vandenberg Air Force Base in California.
"All sats healthy and talking," tweeted Matt Desch, Iridium Communications CEO, soon after launch and confirmation that all 10 Iridium NEXT satellites were successfully deployed from their second stage satellite dispensers. Iridium is a global leader in mobile voice and data satellite communications.
"It was a great day!"
Liftoff of SpaceX Falcon 9 on June 25 at 1:25 p.m. PDT (4:25 p.m. EDT) carrying ten Iridium Next mobile voice and data relay communications satellites to low Earth orbit on the Iridium-2 mission from Vandenberg Air Force Base in California. Credit: SpaceX
The US West Coast Falcon 9 liftoff of the Iridium-2 mission from California on Sunday, June 25 took place barely 48 hours after the US East Coast Falcon 9 liftoff of the BulgariaSat-1 mission from Florida on Friday, June 23.
The perfectly executed launch and landing duo clearly demonstrates the daunting capability of SpaceX's privately owned and operated engineering team to pull off such a remarkable feat in nimble fashion.
The stage was set for the unprecedented Falcon 9 launch doubleheader just a week ago when SpaceX CEO and billionaire founder Elon Musk tweeted out the daring space goal after all went well with the Florida Space Coast's static hotfire test for the first in line BulgariaSat-1 flight.
Blastoff of 2nd flight-proven SpaceX Falcon 9 with 1st geostationary communications for Bulgaria at 3:10 p.m. EDT on June 23, 2017, carrying BulgariaSat-1 to orbit from Launch Complex 39A at NASA's Kennedy Space Center in Florida- as seen from the crawlerway. Credit: Ken Kremer/kenkremer.com
Check out the expanding gallery of Bulgariasat-1 eyepopping photos and videos from several space journalist colleagues and friends and myself.
Click back as the gallery grows !
Sunday's Iridium 2 flight was Iridium Communications second contracted launch with SpaceX.
"This payload of 10 satellites was deployed into low-Earth orbit, approximately one hour after a SpaceX Falcon 9 rocket lifted off from Vandenberg," Iridium said in a statement.
The inaugural Iridium 1 launch with the first ten Iridium Next satellites took place successfully at the start of this year on Jan. 14, 2017.
The new set of ten Iridium Next mobile relay satellites were delivered into a circular orbit at an altitude of 625 kilometers (388 miles) above Earth.
They were released one at a time from a pair of specially designed satellite dispensers at approximately 100 second intervals.
"Since the successful January 14, 2017 launch, Iridium NEXT satellites have already been integrated into the operational constellation and are providing service. The first eight operational Iridium NEXT satellites are already providing superior call quality and faster data speeds with increased capacity to Iridium customers. The two additional satellites from the first launch are continuing to drift to their operational orbital plane, where upon arrival they will begin providing service."
Iridium 2 is the second of eight planned Falcon 9 launches to establish the Iridium NEXT constellation which will eventually consist of 81 advanced satellites.
At least 75 will be launched by SpaceX to low-Earth orbit, with 66 making up the operational constellation.
The inaugural launch of the advanced Iridium NEXT satellites in January 2017 started the process of replacing an aging Iridium fleet in orbit for nearly two decades.
Nine of the 81 will serve as on-orbit spares and six as ground spares.
BulgariaSat-1 and Iridium-2 count as the eighth and ninth SpaceX launches of 2017.
Watch for Ken's onsite BulgariaSat-1 mission reports direct from the Kennedy Space Center and Cape Canaveral Air Force Station, Florida.
Stay tuned here for Ken's continuing Earth and Planetary science and human spaceflight news.
Ken Kremer
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