Good Things Need Time: Progress With the First Hyperspectral Sounder in Geostationary Orbit

My comments address the Geostationary Interferometric Infrared Sounder (GIIRS) on Chinese FY-4A satellite. It is first hyperspectral sounder in geostationary orbit. An impact study by Yin et al. (2021, https://doi.org/10.1029/2021GL093672) of GIIRS data forecasting typhoon (Maria 2018) shows beneficial results. provides temperature and humidity observations cloud-free areas with high vertical and, as a novelty, temporal resolution (as short 15 min) over limited area. The development was long preceded international plans it will be followed other sounders covering ring. major step toward an improved global space-based observing system enabling better forecasts evolution severe convective weather.