SpaceX’s Falcon 9 rocket is set for liftoff from Cape Canaveral on Friday, heading due east over the Atlantic Ocean to deliver the Bangabandhu 1 communications satellite into orbit around 33 minutes later.
The 229-foot-tall (70-meter) rocket is poised for launch from pad 39A at NASA’s Kennedy Space Center in Florida at 4:14 p.m. EDT (2014 GMT) Friday at the opening of a 127-minute launch window.
It will be the first launch of SpaceX’s upgraded “Block 5” version of the workhorse Falcon 9 rocket, featuring changes to make the vehicle easier to reuse and more reliable.
Perched atop the rocket is the Bangabandhu 1 communications satellite, a spacecraft made by Thales Alenia Space for the Bangladesh Telecommunication Regulatory Commission. Bangabandhu 1 is the country’s first communications satellite, and it is named for Bangabandhu Sheikh Mujibur Rahman, the father of the Bangladeshi nation.
The timeline below outlines the launch sequence for the Falcon 9 flight with Bangabandhu 1.
Data source: SpaceX
T-0:00:00: Liftoff
After the rocket’s nine Merlin engines pass an automated health check, hold-down clamps will release the Falcon 9 booster for liftoff from pad 39A.
T+0:01:08: Mach 1
The Falcon 9 rocket reaches Mach 1, the speed of sound, as the nine Merlin 1D engines provide more than 1.7 million pounds of thrust.
T+0:01:14: Max Q
The Falcon 9 rocket reaches Max Q, the point of maximum aerodynamic pressure.
T+0:02:31: MECO
The Falcon 9’s nine Merlin 1D engines shut down.
T+0:02:33: Stage 1 Separation
The Falcon 9’s first stage separates from the second stage moments after MECO.
T+0:02:36: First Ignition of Second Stage
The second stage Merlin 1D vacuum engine ignites for a six-minute burn to put the rocket and Bangabandhu 1 into a preliminary parking orbit.
T+0:03:37: Fairing Jettison
The 5.2-meter (17.1-foot) diameter payload fairing jettisons once the Falcon 9 rocket ascends through the dense lower atmosphere. The 43-foot-tall fairing is made of two clamshell-like halves composed of carbon fiber with an aluminum honeycomb core.
T+0:06:15: Stage 1 Entry Burn
A subset of the first stage’s Merlin 1D engines ignite for an entry burn to slow down for landing. A final landing burn will occur just before touchdown.
T+0:08:10: Stage 1 Landing
The Falcon 9 rocket’s first stage booster touches down on SpaceX’s drone ship in the Atlantic Ocean.
T+0:08:19: SECO 1
The second stage of the Falcon 9 rocket shuts down after reaching a preliminary low-altitude orbit. The upper stage and Bangabandhu 1 begin a coast phase scheduled to last more than 19 minutes before the second stage Merlin vacuum engine reignites.
T+0:27:38: Second Ignition of Second Stage
The Falcon 9’s second stage Merlin engine restarts to propel the Bangabandhu 1 communications satellite into a supersynchronous transfer orbit.
T+0:28:37: SECO 2
The Merlin engine shuts down after a short burn to put the Bangabandhu 1 satellite in the proper orbit for deployment.
T+0:33:38: Bangabandhu 1 Separation
The Bangabandhu 1 satellite separates from the Falcon 9 rocket in a geostationary transfer orbit with a perigee of 186 miles (300 kilometers), an apogee of 22,186 miles (35,706 kilometers) and an inclination of 19.3 degrees.
Just one day after a mission from a nearby launch pad, SpaceX test-fired a Falcon 9 rocket Monday at Cape Canaveral Air Force Station ahead of the company’s next flight. Faced with extreme weather this week in the ocean recovery zone for the Falcon 9’s first stage booster and payload shroud, SpaceX said it was evaluating the best opportunity to launch the Falcon 9 with 60 Starlink broadband satellites.
A Merlin engine designed for the version of SpaceX’s Falcon 9 rocket that will carry astronauts into orbit for NASA failed during testing Saturday in Texas, but the company said its upcoming launches will not be affected by the accident.
Virgin Galactic’s second SpaceShipTwo rocket plane glided to a runway landing after dropping from its carrier aircraft over California’s Mojave Desert on Saturday.
