The warm-core structure of Super Typhoon Rammasun derived by FY-3C microwave temperature sounder measurements.

The microwave temperature sounder (MWTS) on board the third FengYun satellite (FY-3C) is well suited for the detection of tropical cyclones because the observed radiance is insignificantly affected by non-precipitating clouds. In this study, a stepwise multiple linear regression technique is proposed to retrieve the atmospheric temperature profiles based on MWTS measurements. Under clear-sky conditions, the root-mean-square error of retrieved temperature is no >1.4 K, which is low enough to monitor the thermal structure within typhoons. An application of this method to the Super Typhoon Rammasun resolves the warm-core eye and temperature gradients across the eye-wall very well. [ABSTRACT FROM AUTHOR]