Launch Details

Space launch mission information

H-IIA 202 | GOSAT-GW (Ibuki GW)

Launch Successful
67 days ago6/28/2025, 4:33:03 PM
H-IIA 202 | GOSAT-GW (Ibuki GW)

Mission Description

GOSAT-GW (Greenhouse Gases Observing Satellite Greenhouse gases and Water cycle), also known as Ibuki GW and formerly known as GOSAT 3, is JAXA's next generation satellite to monitor the greenhosue gases like carbon dioxide in the Earth's atmosphere. It is the follow on to the GOSAT 2 (Ibuki 2) and GCOM-W (Shizuku) missions. GOSAT-GW will have two missions: greenhouse gases observation for Japan's Ministry of the Environment and the National Institute for Environmental Studies (NIES), and water-cycle observation for JAXA. By developing the GOSAT-GW satellite, Mitsubishi Electric will contribute to measures for preventing disasters attributed to global warming and climate change, and to advance scientific and technological methods that enable more accurate prediction of climate change. In December 2013, Mitsubishi Electric (MELCO) was selected as the prime contractor for the spacecraft and the instruments.

Launch Videos

Launch of “IBUKI GW”(GOSAT-GW) aboard H-IIA Launch Vehicle No.50

Launch of “IBUKI GW”(GOSAT-GW) aboard H-IIA Launch Vehicle No.50

Launch of “IBUKI GW”(GOSAT-GW) aboard H-IIA Launch Vehicle No.50

youtube.com

温室効果ガス・水循環観測技術衛星(GOSAT-GW)/H-IIAロケット50号機打上げライブ中継

温室効果ガス・水循環観測技術衛星(GOSAT-GW)/H-IIAロケット50号機打上げライブ中継

youtube.com

Mission Updates

Cosmic_Penguin

Cosmic_Penguin

1/9/2024, 2:26:07 PM

Tweaked approximate launch date per launch manifest (P.129 of source).

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Cosmic_Penguin

Cosmic_Penguin

12/9/2024, 10:56:00 AM

NET Q2 due to satellite testing delays.

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Cosmic_Penguin

Cosmic_Penguin

3/18/2025, 9:28:00 PM

NET June 2025.

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Cosmic_Penguin

Cosmic_Penguin

4/23/2025, 4:59:00 AM

NET June 23 UTC/early morning June 24 JST.

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Cosmic_Penguin

Cosmic_Penguin

4/25/2025, 5:11:00 AM

GO for launch.

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Cosmic_Penguin

Cosmic_Penguin

6/19/2025, 8:26:00 AM

Launch delayed due to 2nd stage electrical system problem; new launch date TBD.

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Cosmic_Penguin

Cosmic_Penguin

6/24/2025, 5:10:00 AM

Rescheduled for June 28 UTC.

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Cosmic_Penguin

Cosmic_Penguin

6/28/2025, 4:33:00 PM

Liftoff.

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Cosmic_Penguin

Cosmic_Penguin

6/28/2025, 4:55:00 PM

Spacecraft separation.

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Cosmic_Penguin

Cosmic_Penguin

6/28/2025, 6:49:00 PM

Launch success.

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Launch Details

Launch Window

6/28/2025, 4:33:03 PM

to 6/28/2025, 4:52:00 PM

Rocket Details

H-IIA 202

Family: H-II

Variant: 202

Launch Facility

Yoshinobu Launch Complex LP-1

Tanegashima Space Center, Japan