NASA conducted 1,00,000 return simulations for Boeing Starliner, still couldn't find a way to bring Sunita Williams back to Earth
Produced by: Tarun Mishra
Unconfirmed Return for Astronauts
Over a month after astronauts Sunita Williams and Butch Willmore docked with the International Space Station (ISS) aboard Boeing's Starliner spacecraft, their return date remains unconfirmed. NASA and Boeing are conducting extensive tests to ensure their safe return.
Launch of Crew Flight Test
The Starliner’s Crew Flight Test (CFT) was launched on June 5. Since then, Boeing and NASA have been rigorously testing the spacecraft to validate its performance and safety for the return journey.
Comprehensive Testing Simulations
Approximately 100,000 computer model simulations have been conducted to account for every potential scenario the Starliner might encounter during undocking, the deorbit burn, and landing. These simulations are part of a thorough testing process to ensure a successful mission.
Key Engine and System Evaluations
The testing included a detailed review of the Orbital Maneuvering and Attitude Control (OMAC) engine's performance, which is crucial for executing the deorbit burn that will guide the spacecraft back to Earth.
Assessment of Thruster Systems
New tools were used to evaluate the Reaction Control System (RCS) thrusters, ensuring Starliner's ability to perform a nominal deorbit burn even under less-than-ideal conditions.
Hardware and Software Testing
Boeing conducted nine integrated tabletops, 18 runs, and 230 hours of testing in the Avionics and Software Integration Lab (ASIL) to ensure that the hardware and software systems work seamlessly together.
Integrated Undocking Simulation
An integrated simulation involving the crew, CST-100 flight controllers, ISS flight controllers, and engineers was conducted to mimic real-world conditions. This provided critical data and experience for handling the spacecraft.
Commander Wilmore's Training
Commander Butch Wilmore completed three backup control entry training runs using Boeing’s onboard crew training simulator, preparing for any potential issues during the mission.
System Inspections and Confidence in Starliner
Detailed inspections confirmed that 27 of 28 RCS thrusters are fully operational, with stable helium levels crucial for the return trip. Boeing remains confident in Starliner's capability to safely return the crew, with a return date announcement expected soon.