29.06.2025

"Japan Launches Final H-2A Rocket for Emissions Monitoring"

TOKYO (AP) — Japan on Sunday launched a satellite monitoring greenhouse gas emissions using its mainstay H-2A rocket, which made its final flight before it is replaced by a new flagship designed to be more cost competitive in the global space market

TOKYO (AP) – On Sunday, Japan successfully launched the GOSAT-GW satellite atop its H-2A rocket, marking the final flight of this significant rocket series. The H-2A, which has been a vital component of Japan's space endeavors since its inaugural launch in 2001, is set to be replaced by the more cost-effective H3 rocket as Japan aims to enhance its competitiveness in the global space market.

The lift-off occurred from the Tanegashima Space Center, located in southwestern Japan, and was part of broader efforts to monitor and mitigate climate change through greenhouse gas tracking. The GOSAT-GW satellite is the latest in Japan’s ongoing mission to measure levels of carbon dioxide, methane, and other greenhouse gases in the atmosphere. The successful deployment of this satellite underscores Japan's commitment to addressing environmental issues through advanced space technology.

Mitsubishi Heavy Industries, which managed the launch operation, alongside the Japan Aerospace Exploration Agency (JAXA), announced that they would hold a press conference later in the day to provide further insights about the launch and the GOSAT-GW satellite's objectives.

This launch was particularly notable because it represented the 50th flight of the H-2A rocket, which has built an impressive reputation with a near-perfect success record throughout its two-decade service. Following this final mission, the H-2A will conclude its operations as Japan's primary launch vehicle and transition fully to the H3. This new flagship rocket is designed to meet contemporary requirements and is already operational, promising to enhance Japan's capacity for satellite launches.

The GOSAT-GW’s mission is pivotal, as monitoring greenhouse gases is crucial for understanding climate change dynamics and supporting global environmental initiatives. As a third iteration in its series, GOSAT-GW builds upon previous missions, utilizing advanced technology to provide valuable data for climate research and policy development.

Japan’s strategic vision includes the establishment of a stable and competitively priced space transport capability, which is deemed essential not only for scientific and commercial success but also for national security. As part of this strategy, Japan has been developing two new rocket systems: the larger H3, in collaboration with Mitsubishi, and the smaller Epsilon system, developed by the aerospace unit of IHI, a heavy machinery manufacturer. These developments aim to cater to a variety of customer needs and solidify Japan’s position within the expanding satellite launch market.

The recent launch was delayed several days due to issues with the rocket's electrical systems, but the successful outcome represents a significant achievement for Japan's space program, with the GOSAT-GW satellite expected to contribute valuable data aiding in the fight against climate change.