Expected to launch in 2022, the satellite is anticipated to yield important data on plant health, helping scientists to understand how carbon moves through ecosystems as well as how photosynthesis impacts the carbon and water cycles. It will do this by using a spectrometer to measure the faint fluorescence that plants emit when they photosynthesize. It will work in conjunction with the Copernicus Sentinel-3 satellites, which will use optical and thermal sensors to provide additional measurements.