https://www.esa.int/Applications/Observing_the_Earth/FutureEO/HydroGNSS_twice_as_good
https://www.esa.int/Applications/Observing_the_Earth/FutureEO/Contract_secures_build_for_HydroGNSS_Scout_mission
https://www.sstl.co.uk/media-hub/latest-news/2021/sstl-hydrognss-climate-mission-given-green-light-by-esa