Live coverage: SpaceX rocket ready for late-night launch for Arabsat

SpaceX plans to kick off Memorial Day weekend with a late-night rocket launch Friday from Cape Canaveral, boosting a nearly five-ton communications satellite into orbit for Arabsat, a multinational consortium providing TV and video broadcast services across the Middle East.

SpaceX scrubbed a launch attempt early Wednesday at Cape Canaveral due to thick cloud cover, then delayed the liftoff of the Falcon 9 rocket until Friday night to wait for improved weather and to make room for the test-firing of United Launch Alliance’s Vulcan rocket at a neighboring launch pad.

In the end, ULA postponed the test-firing of its Vulcan rocket, and SpaceX was approved by the Space Force’s Eastern Range for another launch attempt Friday evening.

The Falcon 9 has a launch window of nearly two hours to lift off from pad 40 opening at 11:25 p.m. EDT Friday (0325 UTC Saturday). The weather forecast remains iffy, however, with just a 30% probability of acceptable weather for liftoff due to clouds and gusty winds.

When it takes off, the Falcon 9 rocket will head east from Cape Canaveral to deliver the Badr 8 satellite into an elliptical geostationary transfer orbit about a half-hour after liftoff. The launch will mark SpaceX’s 36th flight of the year, and the 26th orbital launch attempt so far in 2023 from Florida’s Space Coast.

The nearly 10,000 pound (4.5-metric ton) Badr 8 communications satellite is closed up inside the Falcon 9’s nose cone. Built by Airbus Defense and Space, the Badr 8 satellite will provide C-band and Ku-band communications services to replace capacity currently offered by the aging 15-year-old Badr 6 satellite in geostationary orbit.

Badr 8 will move into position at the same orbital slot as Badr 8, located along the equator at 26 degrees east longitude. The Badr satellites are owned by Arabsat, a pan-Arab consortium of 21 member states based in Riyadh, Saudi Arabia. Badr 8 will provide television broadcast services, video relay, and data services across the Middle East and North Africa, Europe, and Central Asia.

Arabsat says its investment in the Badr 8 program totals about $300 million, including the spacecraft manufacturing contract with Airbus, the launch agreement with SpaceX, insurance, and ground infrastructure.

SpaceX’s Falcon 9 rocket stands on pad 40 at Cape Canaveral Space Force Station in preparation for liftoff with the Badr 8 communications satellite for Arabsat. Credit: SpaceX

Badr 8 is based on Airbus’s Eurostar Neo satellite platform, the company’s newest large spacecraft bus. After separation from the Falcon 9 rocket about 37 minutes into the mission, Badr 8 will unfurl its solar panels and run through a series of post-launch checkouts under the supervision of Airbus ground controllers in Toulouse, France.

Then Badr 8 will use low-thrust, high-efficiency plasma thrusters to maneuver into a circular geostationary orbit more than 22,000 miles (nearly 36,000 kilometers) over the equator, settling into an orbit that matches the speed of Earth’s rotation, giving the spacecraft a constant view of its coverage zone stretching from Europe, to the Middle East, and into Central Asia.

The orbital adjustments will take several months, then Badr 8 will complete in-orbit testing and should be ready to commence operational service for Arabsat later this year. The Badr 8 spacecraft is designed for a 15-year service life.

Besides its purpose as a commercial communications satellite, Badr 8 also hosts an experimental laser communications payload for Airbus. The TELEO demonstration will test new optical communications technology in a partnership between Airbus, the French space agency CNES, and Safran Data Systems.

The TELEO payload will test the technology’s ability to beam data from the satellite to a ground station using lasers, allowing for the transfer of information at up to 10 gigabits per second. Airbus and its partners hope to advance the technology for future missions to achieve a one terabit per second bit rate using optical communications.

“This TELEO demonstrator will also enable very high capacity optical feeder link communications, by nature highly robust against jamming, as part of the development by Airbus of a new generation of optical communications technology in space,” Airbus said in a press release.

The Badr 8 satellite satellite being prepared for shipment to Cape Canaveral from Airbus’s factory in Toulouse, France. Credit: Airbus

The launch of Badr 8 continues a jam-packed sequence of SpaceX missions. It will be the fourth SpaceX Falcon 9 launch in a little more than a week, following a Falcon 9 flight with Starlink satellites May 19 from Cape Canaveral, a Falcon 9 launch from California on May 20 with payloads for OneWeb and Iridium, and the launch of Axiom Space’s Ax-2 private astronaut mission May 21 from Kennedy Space Center in Florida.

Working out of SpaceX’s launch and landing control center just south of Cape Canaveral Space Force Station, engineers will oversee the late-night countdown leading up to liftoff of the Badr 8 mission Friday. The Falcon 9 rocket will be filled with a million pounds of kerosene and liquid oxygen propellants in the final 35 minutes before liftoff.

After teams verify technical and weather parameters are all “green” for launch, the nine Merlin 1D main engines on the first stage booster will flash to life with the help of an ignition fluid called triethylaluminum/triethylborane, or TEA-TEB. Once the engines ramp up to full throttle, hydraulic clamps will open to release the Falcon 9 for its climb into space.

The nine main engines will produce 1.7 million pounds of thrust for more than two-and-a-half minutes, propelling the Falcon 9 and Badr 8 into the upper atmosphere. Then the booster stage will shut down and separate from the Falcon 9’s upper stage to begin a controlled descent toward SpaceX’s drone ship “Just Read the Instructions” parked in the Atlantic Ocean.

SpaceX’s mission patch for the Badr 8 mission, with illustrations of the Falcon 9 rocket and the Badr 8 spacecraft with its solar panels unfurled. Credit: SpaceX

The booster, designated B1062, will extend titanium hypersonic grid fins and use cold gas nitrogen thrusters to control its orientation, then reignite three of its nine main engines for a nearly 30-second braking maneuver during re-entry. A final landing burn with just the center engine will slow the rocket for touchdown on the drone ship about eight-and-a-half minutes into the mission.

A SpaceX recovery ship is also in position in the Atlantic to recover the Falcon 9 rocket’s payload fairing after the nose cone’s two clamshell halves parachute into the sea. The payload fairing will jettison from the rocket about three-and-a-half minutes into the flight, shortly after ignition of the Falcon 9’s upper stage engine.

The Falcon 9 rocket will fire its upper stage engine two times to inject the Badr 8 spacecraft into an elliptical supersynchronous transfer orbit. Separation of Badr 8 from the Falcon 9’s upper stage is expected at T+plus 37 minutes, 13 seconds.

ROCKET: Falcon 9 (B1062.14)

PAYLOAD: Badr 8 communications satellite

LAUNCH SITE: SLC-40, Cape Canaveral Space Force Station, Florida

LAUNCH DATE: May 26/27, 2023

LAUNCH WINDOW: 11:25 p.m.-1:22 a.m. EDT (0325-0522 UTC)

LAUNCH WINDOW: Instantaneous

WEATHER FORECAST: 30% probability of acceptable weather; Main concerns are cumulus clouds, electrical fields, and ground winds

BOOSTER RECOVERY: “Just Read the Instructions” drone ship in the Atlantic Ocean

LAUNCH AZIMUTH: East

TARGET ORBIT: Supersynchronous transfer orbit

LAUNCH TIMELINE:

T+00:00: Liftoff T+01:12: Maximum aerodynamic pressure (Max-Q) T+02:33: First stage main engine cutoff (MECO) T+02:36: Stage separation T+02:44: Second stage engine ignition T+03:22: Fairing jettison T+06:29: First stage entry burn ignition (three engines) T+06:51: First stage entry burn ends T+08:10: Second stage engine cutoff (SECO 1) T+08:23: First stage landing burn ignition (one engine) T+08:44: First stage landing T+29:03: Second stage engine restart T+30:02: Second stage engine cutoff (SECO 2) T+37:13: Badr 8 separation

MISSION STATS:

227th launch of a Falcon 9 rocket since 2010 238th launch of Falcon rocket family since 2006 14th launch of Falcon 9 booster B1062 192nd Falcon 9 launch from Florida’s Space Coast 126th Falcon 9 launch from pad 40 181st launch overall from pad 40 168th flight of a reused Falcon 9 booster 2nd SpaceX launch for Arabsat 33rd Falcon 9 launch of 2023 36th launch by SpaceX in 2023 26th orbital launch attempt based out of Cape Canaveral in 2023

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