Global Observing Satellite for Greenhouse gases and Water cycle

Global Observing Satellite for Greenhouse gases and Water cycle (GOSAT-GW), also called Ibuki GW, is a Japanese Earth observation satellite for observing the global water cycle and greenhouse gas monitoring. It is a successor to the GCOM-W and the GOSAT-2 satellites. GOSAT-GW was jointly developed by the Japan Aerospace Exploration Agency (JAXA), Ministry of the Environment, and the National Institute for Environmental Studies (NIES). GOSAT-GW was launched on 28 June 2025, on the last launch of JAXA’s workhorse H-IIA rocket.^[2]

Global Observing Satellite for Greenhouse gases and Water cycle

Scale model of GOSAT-GW at Tsukuba Space Center Space Dome
Names	Ibuki GW
Mission type	Environmental
Operator	JAXA
Website	www.satnavi.jaxa.jp/files/project/gosat-gw/en/
Mission duration	7 years (planned)
Spacecraft properties
Manufacturer	Mitsubishi Electric
Power	5.3 kilowatts[1]
Start of mission
Launch date	28 June 2025 16:33 UTC
Rocket	H-IIA-202 F50
Launch site	Tanegashima, LA-Y1
Contractor	Mitsubishi Heavy Industries
Orbital parameters
Reference system	Geocentric
Regime	Low Earth
Instruments
AMSR-3 TANSO-3
← GOSAT-2 GCOM-W

Overview

GOSAT-GW is a Japanese Earth observation satellite that was successfully launched on 28 June 2025. Unlike its predecessor GCOM-W, GOSAT-GW will not be placed in the A-train satellite constellation orbit.

See also

• Spaceflight portal

• Global Precipitation Measurement
• Orbiting Carbon Observatory 2
• Orbiting Carbon Observatory 3
• Sentinel-3
• Soil Moisture Active Passive
• TanSat