Advanced Microwave Radiometer - Climate Quality

AMR-C is the Sentinel-6 Advanced Microwave Radiometer - Climate Quality payload for wet-tropospheric path-delay correction of Poseidon-4/SRAL altimetry.^[1] It measures baseline brightness-temperature channels at 18.7, 23.8, and 34 GHz.^[1][2] The instrument performs passive microwave radiometry, demonstrated on Sentinel-6A.^[1] Copernicus also identifies an experimental high-frequency microwave radiometer component at 90, 130, and 168 GHz with no mission requirements or objectives.^[1] For spatial resolution, Copernicus gives less than 35 km along-track measurement resolution across the three baseline channels, while NASA Earthdata gives baseline footprints of 41.6 km at 18.7 GHz, 36.1 km at 23.8 GHz, and 22.9 km at 34 GHz.^[1][3]