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Japan launches a climate change monitoring satellite on mainstay H2A rocket’s last flight

  • Japan launched its 50th and final H-2A rocket carrying the GOSAT-GW satellite on June 29, 2025, from Tanegashima Space Center.
  • The H-2A rocket has served Japan for 24 years since 2001, but it is retiring to make way for the newer, lower-cost H3 rocket.
  • The GOSAT-GW satellite separated at about 670 kilometers altitude, deployed solar panels, and will monitor greenhouse gases and water cycles.
  • Keiji Suzuki, a Mitsubishi Heavy official, stated that the H-2A series has reached an important milestone by maintaining a 98 percent launch success rate.
  • The final H-2A launch marks a shift to the H3 rocket, aiming to boost Japan's competitiveness with a lower launch cost and higher flight rate.
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Nikkei broke the news in Japan on Friday, June 27, 2025.
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