The SpaceX-developed Starship heavy-lift launch vehicle and its Super Heavy booster are scheduled for their 13th suborbital flight test, with the earliest launch window set for Thursday evening (16th) at 5:45 PM US Eastern Time (6:45 AM Beijing Time on the 17th). This test will subject the vehicle to higher aerodynamic pressures during the mid-flight phase and, for the first time, carry operational third-generation Starlink (V3) broadband satellites to verify their orbital deployment and space laser communication capabilities.

The launch is planned from the Starbase facility in Boca Chica, Texas, with the overall flight profile closely mirroring the 12th test conducted in May. After liftoff, the rocket will follow a suborbital trajectory for approximately one hour, traversing much of the globe before executing a controlled splashdown in a predetermined area of the Indian Ocean off the northwest coast of Australia.

Unlike previous tests that used mass simulators, this Starship mission will carry 20 fully functional third-generation Starlink satellites in its payload bay. During the test, the technical team will attempt to activate the satellites during the space deployment phase and conduct tests of space laser communication links between the new third-generation satellites and the existing low-Earth orbit constellation. SpaceX notes that once Starship is fully operational for commercial service, a single launch could deliver up to 60 third-generation Starlink satellites, significantly boosting network capacity and data transmission capability from the current 2.6 Tbps per mission to 60 Tbps. This advancement lays the technical groundwork for future orbital data center construction and supports NASA's Artemis lunar exploration program.

Key Technical Objectives

Beyond satellite deployment, this test flight aims to address technical challenges from prior missions.

Firstly, it will verify the in-space restart capability of the Raptor engines. During May's test, one Raptor engine shut down prematurely during ascent, preventing the planned in-space restart test. As this technology is critical for the vehicle's future safe deorbit maneuvers and avoiding orbital debris, the team has implemented hardware optimizations to the engine start sequence and will attempt this crucial operation again during Thursday's flight.

Secondly, the mission seeks to improve the reliability of the Super Heavy booster's recovery. Following issues in the last test where the booster deviated by 90 degrees during its flip maneuver after stage separation and failed to splashdown successfully due to five engines not reigniting, SpaceX has adjusted engine ignition timing and modified software and hardware alert systems to better manage the complex electromagnetic and thermal environment of multiple engines operating in parallel.

Additionally, this flight will subject Starship's reusable heat shield to a high-pressure limit test. Technicians have installed new thermal protection tiles with improved attachment mechanisms on the vehicle's surface and, for the first time, added instrumented tiles with embedded sensors. During ascent, the spacecraft will endure higher dynamic pressures than before to test the structural integrity of the heat shield tiles under extreme stress. SpaceX founder Elon Musk has emphasized that achieving a rapidly reusable heat shield that does not require extensive manual inspection is a critical step toward realizing the ultimate goal of fully autonomous, low-cost, and rapid reusability for Starship's Earth-to-space往返 missions.