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Japan started on Saturday, June 28, 2025, his 50th and final H-2A rocket with the Gosat GW satellite. | Credit: Jaxa
Japan started a double satellite to monitor the sea temperature and greenhouse gases.
The Japan Aerospace Exploration Agency (Jaxa) on Saturday (June 28th) carried out its 50th and last start of the H-2A rocket and brought the Gosat GW-Dual-Purple satellite into space. The mission rose at 12:33 p.m. Edt (1633 GMT; 1:33 a.m. June 29, local time in Japan) from the Yoshinobu start complex (LP-1) in the Tenegashima Space Center in Japan.
The greenhouse gas and water cycle observation satellite (Gosat-GW) are the latest efforts of Japan to observe changes in the water cycles and greenhouse gases. Gosat-GW joined its predecessors in the Earth Orbit: Gcom-W2, which was started in 2012 and is known as “Shizuku” and Gosat-1, which was started in 2009 and was known as “Ibuki”.
Gosat-GW is equipped with two main instruments.
The first is known as an advanced microwave radiometer (AMSR) and measures water cycles and fluctuations in the sea surface temperatures. The second is the greenhouse gas observation sensor (tanso) and monitors components such as carbon dioxide in the earth’s atmosphere to measure climate change.
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The Japan’s H-2A rocket, which was built by Mitsubishi Heavy Industries for Jaxa, was able to bring payloads to a geostationary orbit around the earth and circle the moon. The Akatsuki spaceship also started to examine Venus in 2010, although the spaceship does not properly get into the Venusian orbit.
The H-2A was first introduced in 2001. During the almost 25 years of employment, the rocket only experienced a single start failure, which received a success rate of 98% for the vehicle. After 50 missions, the carrier vehicle is now placed in retirement for Japan’s H3 rocket, which offers a comparable performance at lower costs.
