Sea Surface Salinity (SSS): Sea surface salinity is a crucial dynamic parameter in the marine system. Following the cessation of the Aquarius satellite mission, the SMAP satellite continues to provide satellite observations of sea surface salinity. The L-band radiometer on the SMAP satellite is used to retrieve sea surface salinity. The salinity retrieval algorithm involves multiple steps aimed at removing interfering radiation sources (galaxies, sun, moon, and Earth's atmosphere) to isolate only the radiation from the Earth's surface. The unit is psu.
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