GOSAT-2 (Greenhouse gases Observing Satellite 2 / Ibuki-2)

GOSAT-2 (Greenhouse gases Observing Satellite 2), also known as Ibuki-2, is the successor to GOSAT, developed jointly by JAXA, the Ministry of the Environment of Japan, and NIES. Launched on 29 October 2018 into a sun-synchronous orbit at 613 km altitude, the mission continues the GOSAT greenhouse gas record; its TANSO-FTS-2 adds a fifth band and intelligent cloud-avoidance pointing, with a 6-day revisit cycle over a 1,300 km swath.^[1][2]

The primary instrument is TANSO-FTS-2, a five-band Fourier Transform Spectrometer spanning 0.755 to 14.29 micrometres with 0.2 wavenumber per centimetre spectral resolution and an intelligent pointing system for cloud avoidance. An O2-A band sun-induced fluorescence (SIF) retrieval capability has been demonstrated from TANSO-FTS-2 data. The secondary instrument is TANSO-CAI-2, a pushbroom aerosol and cloud imager operating from 0.333 to 1.675 micrometres with a 1,000 km swath.^[1][3]

GOSAT-2 has experienced recurring short data-delivery suspensions associated with lunar calibration and diagnostic mode events; each suspension has been resolved and normal operations resumed within days to weeks. Data are distributed through JAXA EORC and the NIES GOSAT-2 project site.^[2][4]