Watch our coverage of the countdown and launch of a SpaceX Falcon 9 rocket at 2:13 p.m. EST (1913 GMT) from Space Launch Complex 40 at Cape Canaveral Space Force Station, Florida, with 40 OneWeb internet satellites. Follow us on Twitter.
SpaceX is set to launch a Falcon 9 rocket from Cape Canaveral Space Force Station Thursday with 40 more internet satellites for rival OneWeb, followed eight minutes later by the landing of the rocket’s first stage booster back at the Florida spaceport.
The mission, SpaceX’s 16th flight of the year overall, is the third and final planned dedicated Falcon 9 launch for OneWeb, which switched launch providers from Russia’s Soyuz rocket to SpaceX and Indian launchers last year after the Russian invasion of Ukraine. OneWeb has another reservation with SpaceX for a rideshare mission with Iridium later this year.
With the 40 spacecraft on Thursday’s mission, OneWeb will have launched 584 satellites to date on 17 rockets — 13 Soyuz flights, three SpaceX Falcon 9s, and one Indian GSLV Mk.3. OneWeb has reported two failed satellites in its constellation, meaning the launch Thursday will bring the tally of active OneWeb spacecraft to 582.
OneWeb also has one more launch on an Indian GSLV Mk.3 rocket scheduled later this month with 36 more internet satellites. That launch will put OneWeb over the 588-satellite threshold needed for global internet coverage. OneWeb plans to launch nearly 650 satellites in total for its first-generation network, including spares.
SpaceX’s 229-foot-tall (70-meter) Falcon 9 rocket is set to take off from pad 40 at Cape Canaveral Space Force Station at 2:13:28 p.m. EST (1913:28 GMT). There is a 95% chance of favorable weather for liftoff Thursday.
The SpaceX launch team working in a control center just outside the gate of Cape Canaveral Space Force Station will begin loading super-chilled, densified kerosene and liquid oxygen propellants into the Falcon 9 vehicle at T-minus 35 minutes.
Helium pressurant will also flow into the rocket in the last half-hour of the countdown. In the final seven minutes before liftoff, the Falcon 9’s Merlin main engines will be thermally conditioned for flight through a procedure known as “chilldown.” The Falcon 9’s guidance and range safety systems will also be configured for launch.
After liftoff, the Falcon 9 rocket will vector 1.7 million pounds of thrust from its main engines to steer downrange toward the southeast over the Atlantic Ocean, then the launcher will turn south to fly parallel to Florida’s east coast, aiming for a polar orbit at an inclination of 87 degrees.
The launcher will surpass the speed of sound in about one minute, then shut down its nine main engines nearly two-and-a-half minutes after liftoff.
The booster stage will separate from the Falcon 9’s upper stage, then fire pulses from cold gas control thrusters and extend titanium grid fins to help steer the vehicle back into the atmosphere. The lighter weight of the 40 OneWeb satellites — each about the size of a mini-refrigerator — will allow the Falcon 9 booster to set aside enough fuel to return to the launch site, which requires an additional engine burn compared to rocket landings on SpaceX’s ocean-going drone ships.
Landing of the first stage on Landing Zone 1 at Cape Canaveral is expected about eight minutes into the mission. The returning booster will return to the launch base with a pair of sonic booms as it slows for landing. The first stage, designated B1062, will complete its 13th flight to space on Thursday’s mission.
The Falcon 9’s upper stage will fire its single engine two times to reach a near-circular polar orbit close to the mission’s target altitude of 373 miles (600 kilometers). The upper stage will release the 40 OneWeb satellites beginning about 59 minutes after liftoff, and SpaceX confirmed all the spacecraft had separated about 1 hour and 35 minutes into the flight.
The OneWeb satellites, built in a factory just outside the gates of Kennedy Space Center, will use xenon-fueled propulsion systems to reach their operating altitude 745 miles (1,200 kilometers) above Earth. The orbit-raising will take several months before the satellites are ready to begin commercial broadband service. London-based OneWeb has a joint venture with Airbus to build the satellites.
Adding more relay stations to the constellation extends the network’s reach. OneWeb already provides internet services to communities in Alaska, Canada, and and Northern Europe where terrestrial fiber connectivity is unavailable.
OneWeb began launching its satellites in February 2019. The first-generation constellation is spread into 12 orbital planes that fly on north-south routes over the poles, enabling worldwide network coverage.
Arianespace, the French launch service provider, was on the hook with OneWeb for six more Soyuz launches from the Baikonur Cosmodrome in Kazakhstan, including a launch that was set to take off last March. Russian officials suspended launch preparations for a Soyuz/OneWeb mission last March after Western governments levied sanctions on Russia in response to the country’s invasion of Ukraine.
Thirty-six OneWeb spacecraft were left stranded at the Russian-controlled Baikonur Cosmodrome in Kazakhstan after the launch was grounded. Officials from OneWeb do not expect to regain custody of the satellites.
Massimiliano Ladovaz, OneWeb’s chief technology officer, said last year OneWeb manufactured new satellites to replace the spacecraft impounded by Russia.
Less than a month after Soyuz launches were suspended last year, OneWeb announced an agreement with SpaceX to launch some of its remaining satellites. OneWeb finalized a similar agreement with New Space India Limited, the commercial arm of India’s space agency, for launches on Indian rockets.
The contract with SpaceX was surprising to many satellite industry watchers because OneWeb is an indirect competitor in broadband market. SpaceX sells Starlink service directly to consumers, while OneWeb sells to enterprises and internet service providers to provide connectivity for entire businesses or communities.
SpaceX has launched two missions for OneWeb, successfully delivering 80 OneWeb satellites into orbit on two Falcon 9 rockets Dec. 8 and Jan. 9. India’s GSLV Mk.3 rocket launched 36 OneWeb satellites Oct. 22.
ROCKETS: Falcon 9 (B1062.13)
PAYLOADS: 40 OneWeb satellites (OneWeb 17)
LAUNCH SITES: SLC-40, Cape Canaveral Space Force Station, Florida
LAUNCH DATES: March 9, 2023
LAUNCH TIME: 2:13:28 p.m. EST (1913:28 GMT)
WEATHER FORECAST: 95% chance of acceptable weather at Cape Canaveral
BOOSTER RECOVERY: Landing Zone 1 at Cape Canaveral Space Force Station
LAUNCH AZIMUTH: Southeast, then south from Cape Canaveral
TARGET ORBIT: 373 miles (600 kilometers), 87 degrees inclination
LAUNCH TIMELINE FOR ONEWEB 16:
- T+00:00: Liftoff
- T+01:12: Maximum aerodynamic pressure (Max-Q)
- T+02:17: First stage main engine cutoff (MECO)
- T+02:20: Stage separation
- T+02:28: Second stage engine ignition
- T+02:34: First stage boost back burn ignition
- T+03:22: First stage boost back burn cutoff
- T+03:33: Fairing jettison
- T+06:10: First stage entry burn ignition
- T+06:28: First stage entry burn cutoff
- T+07:23: First stage landing burn ignition
- T+07:50: First stage landing
- T+08:34: Second stage engine cutoff (SECO 1)
- T+55:17: Second stage engine restart (SES 2)
- T+55:20: Second stage engine cutoff (SECO 2)
- T+58:50: Separation of first OneWeb satellites
- T+01:35:18: Separation of final OneWeb satellites
- 209th launch of a Falcon 9 rocket since 2010
- 219th launch of Falcon rocket family since 2006
- 13th launch of Falcon 9 booster B1062
- 179th SpaceX launch from Florida’s Space Coast
- 116th Falcon 9 launch from pad 40
- 171st launch overall from pad 40
- 149th flight of a reused Falcon 9 booster
- 3rd SpaceX launch for OneWeb
- 17th overall launch for OneWeb
- 15th Falcon 9 launch of 2023
- 16th launch by SpaceX in 2023
- 12th orbital launch from Cape Canaveral in 2023