Training of Tropical Cyclone Wind Speed Algorithms for the Windsat and AMSR Sensors

We present and discuss algorithms for measuring wind speeds with WindSat, ASMR-E and AMSR2 in tropical cyclones. The algorithms are trained from SMAP wind speeds, which have been proven to provide reliable wind speeds in strong storms and which are not affected by rain. They perform well under heavy precipitation where most other passive wind speed retrievals fail.