EO·Atlas
GOSAT-GW (IBUKI GW)
GOSAT-GW, also known as IBUKI GW (Global Observing SATellite for Greenhouse gases and Water cycle), is a JAXA-operated Earth observation mission designed to monitor atmospheric greenhouse gases and the water cycle. It is the third flight unit of the GOSAT programme, following GOSAT and GOSAT-2.[1]
The satellite was launched on 2025-06-29 by H-IIA from Tanegashima Space Center. JAXA and NIES report the launch as 2025-06-29 in local time (JST); the WMO OSCAR record lists 2025-06-28 UTC.[1][2] As of mid-2026 the satellite was in the commissioning phase. AMSR3 began collecting verification observations on 2025-08-11.[3]
GOSAT-GW flies in a sun-synchronous orbit at 666 km altitude with a 13:30 local time ascending node and a 3-day repeat cycle.[2] Its two main instruments are the TANSO-3 grating imaging spectrometer, which measures CO2, CH4 and other greenhouse gases in wide and focus observation modes, and the Advanced Microwave Scanning Radiometer 3 (AMSR3), a passive microwave radiometer for precipitation, sea-surface temperature, sea ice, and water vapour observations.[1][4]
Supply chain position
- [1]NIES GOSAT-GW spacecraft and instrumentsagency doc2026-06-14
- [2]GOSAT-GW, WMO OSCAR satellite recordcommunity2026-06-14
- [3]JAXA early observation results of AMSR3 onboard GOSAT-GWagency doc2026-06-14
- [4]The greenhouse gas observation mission with GOSAT-GWpeer reviewed2026-06-14
How to cite this page
Plain text
GOSAT-GW (IBUKI GW). EO-Atlas, SpectraWorks B.V. https://eo-atlas.org/missions/gosat-gw (CC BY 4.0)
BibTeX
@misc{eoatlas:missions:gosat-gw,
title = {GOSAT-GW (IBUKI GW)},
author = {{EO-Atlas}},
publisher = {SpectraWorks B.V.},
note = {CC BY 4.0},
url = {https://eo-atlas.org/missions/gosat-gw}
}