I was interested to know how they measure water salinity from space, but the ESA page isn't very informative. https://www.esa.int/Applications/Observing_the_Ea

I was interested to know how they measure water salinity from space, but the ESA page isn't very informative. https://www.esa.int/Applications/Observing_the_Earth/FutureEO/SMOS/Novel_technology https://www.esa.int/Applications/Observing_the_Earth/FutureE...