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Global Observing Satellite for Greenhouse gases and Water cycle

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Japanese Earth observation satellite

Global Observing Satellite for Greenhouse gases and Water cycle
Spacecraft properties
Scale model of GOSAT-GW atTsukuba 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)


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
AMSR3 TANSO-3
← GOSAT-2 GCOM-W

Global Observing Satellite for Greenhouse gases and Water cycle (GOSAT-GW), also calledIbuki GW, is a JapaneseEarth observation satellite for observing the global water cycle andgreenhouse gas monitoring. It is a successor to theGCOM-W and theGOSAT-2 satellites. GOSAT-GW was jointly developed by the Japan Aerospace Exploration Agency (JAXA),Ministry of the Environment, and theNational Institute for Environmental Studies (NIES). GOSAT-GW was launched on 28 June 2025, on the last launch of JAXA’s workhorseH-IIA rocket.^[2]

Overview

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

References

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^"GOSAT-GW and TANSO-3"(PDF) (in Japanese).Mitsubishi Electric. 2022. Retrieved2025-06-28.
^"温室効果ガス・水循環観測技術衛星（GOSAT-GW）の打上げ時刻および打上げ時間帯" (Press release) (in Japanese).JAXA. June 27, 2025. RetrievedJune 28, 2025.

External links

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Japanese space program

Italics indicates projects in development.
Symbol^† indicates failed projects.
~~Strikethrough lines~~ indicate cancelled projects.

Space agencies

National space agencies	JAXA formerISAS NAL NASDA NICT JSS
Joint development partners	United StatesNASA¹ ESA² ItalyASI³ CanadaCSA⁴ RussiaRoscosmos⁵ BrazilAEB⁶ INPE⁷ IndiaISRO⁸

Astronomical observation

Past	Akari ASCA ASTRO-E^† ~~Astro-G~~ CORSA^† Ginga Hakucho HALCA Hinotori Hisaki Hitomi^† ~~SPICA~~ Suzaku Tenma Yohkoh
Active	Hinode XRISM¹
Future	ATHENA² SOLAR-C¹ GREX-PLUS [ja] HiZ-GUNDAM [ja] LAPYUTA LiteBIRD Nancy Grace Roman Space Telescope¹ JASMINE

Communications satellites,broadcasting satellites andsatellite navigation systems

Past	BS 2X 3H 3N Kakehashi Kirari Kizuna Kodama MBSat N-STAR a b Sakura (1 2a 2b 3a 3b) Yuri 1 2a 2b 3a 3b
Active	Kirameki 1 2 Michibiki 1 2 3 4 1R MTSAT N-STAR c d JDRS
Future	DSN 3 QZS 5 6 7

Earth observation

Past	Akebono Daichi 1 3^† Denpa Fuyo-1 Jikiken Kyokko Midori I II Momo 1 1b Ohozora Taiyo TRMM¹ Ume 1 b Geotail¹
Active	Aqua^1,7 Arase ASNARO 1 2 Daichi 2 4 EarthCARE² GPM¹ Himawari Ibuki original 2 Shikisai Shizuku
Future	GOSAT-GW PMM

Engineering tests

Past	Ayame 1 2 DASH EXPRESS IKAROS Jindai Kiku 1 2 3 4 5 6 7 8 LDREX 1 2 LRE Micro LabSat-1 Myojo Ohsumi Orizuru RAISE 2 3^† ~~PETSAT~~ RAPIS-1 Ryusei SERVIS-1 SERVIS-2 SDS-1 SDS-4 SFU Shinsei ~~SmartSat-1~~ Tansei 1 2 3 4 Tasuki Tsubame Tsubasa USERS
Active	Ajisai Reimei
Future	BEAK ETS-IX G-SATELLITE SERVIS-3

Human spaceflight

Past	~~Fuji crewed spacecraft~~ ~~HOPE-X~~ H-II Transfer Vehicle
Active	International Space Station (ISS) &Japanese Experiment Module (Kibō)^1,2,3,4,5,6 HTV-X
Future	Japanese Space Station Module (Mitsui) Lunar Gateway^1,2,4

Space probes

The Moon

Past	Hakuto-R Mission 1^† Hiten ~~Lunar-A~~ Kaguya (SELENE) OMOTENASHI^† ~~SELENE-2~~ Smart Lander for Investigating Moon (SLIM) Hakuto-R Mission 2^† EQUULEUS Yaoki
Future	~~HERACLES~~^2,4 Lunar Cruiser Lunar Polar Exploration Mission⁸ (LUPEX)

Others

Past	Akatsuki Hayabusa ~~Hayabusa Mk2~~ Nozomi^† PROCYON^† Sakigake Shin'en^† Suisei
Active	BepiColombo (MMO/Mio)² Hayabusa2 Jupiter Icy Moons Explorer² Hera²
Future	Comet Interceptor² DESTINY+ Dragonfly¹ MELOS Martian Moons eXploration Next Generation Small-Body Sample Return TEREX

Reconnaissance satellites

Past	IGS-Optical 1 2 Experimentally 3 IGS-Radar 1 2
Active	IGS-Optical 3 4 5 6 Experimentally 5 IGS-Radar 3 4 Spare 5 6
Future	IGS-Optical 7 8 IGS-Radar 7 8

Privatesmall satellites

Past	CosMoz CUTE 1.7+APD Fuji 1 2 Hayato HIBARI HIT-SAT Kagayaki Kanta-kun (WEOS) Kūkai Maido-1 Negai☆″ Niwaka RAIKO Waseda-SAT2 WE WISH
Active	CUTE 1 1.7+APDII Fuji-3 Hitomi Hodoyoshi 1 2 3 4 Horyu 2 Kiseki PROITERES Raijin Raijin-2 SEEDS SOCRATES XI IV V
Future	DRUMS KITSUNE OPUSAT-II QSAT-EOS RSP-01 SOMESAT SpaceTuna1 SPROUT TSUBAME WNI satellite

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