JAXA Prepares Epsilon S Rocket for Launch Attempt After Weather Delays
Summary: JAXAs Epsilon S solid-fuel rocket is being prepared for a launch attempt from Uchinoura Space Center on July 25, 2026, after weather delays.
The Japan Aerospace Exploration Agency (JAXA) is finalizing preparations for the launch of its next-generation Epsilon S solid-fuel launch vehicle from the Uchinoura Space Center. The mission, originally scheduled for earlier in the week, was postponed due to unfavorable weather conditions at the launch site. This flight marks the crucial second attempt for the Epsilon S rocket following a failure during its inaugural launch in 2024, and its success is vital for JAXA's medium-lift rocket program.
The Epsilon S represents a significant upgrade to the Epsilon rocket series, designed to enhance launch flexibility and reduce costs. Standing approximately 27 meters tall with a diameter of 2.6 meters, the vehicle features a newly developed SR-A solid motor for its first stage and a proven SR-B motor for its second stage. According to JAXA, this mission aims to deliver a technology demonstration satellite into its target orbit to test the performance of the new propulsion systems and onboard equipment.
Following the weather delay, engineering teams conducted comprehensive checks on the rocket's status. Reports from the scene indicate that all systems are in good condition and the vehicle has been returned to a launch-ready state. The JAXA mission control center will assess the latest weather forecasts to determine whether to proceed with the launch attempt on July 25 within the available window. Should this attempt be further postponed, the team will evaluate the next available launch opportunity.