Since 2009. three low frequency microwave sensors have been launched into space with the capability of global monitoring of sea surface salinity (SSS). The European Space Agency’s (ESA’s) Microwave Imaging Radiometer using Aperture Synthesis (MIRAS). onboard the Soil Moisture and Ocean Salinity mission (SMOS). https://www.allfixelectricales.shop/product-category/cartridge-alignment-gauge/