Determining Tropical Cyclone Center and Rainband Size in Geostationary Satellite Imagery

Brightness temperature (TB) observations at an infrared channel (10.3 ?m) of the Advanced Baseline Imager (ABI) on board U. S. 16th Geostationary Operational Environmental Satellite (GOES-16) are used for determining tropical cyclone (TC) center positions and rainband sizes. Firstly, azimuthal spectral analysis method is employed to obtain azimuthally symmetric a TC. Then, inner outer rainbands radii, denoted as RIR ROR, respectively, estimated based radial gradients TB different angles. The radius describes size TC inner-core region, ROR reflects maximum extent rainbands. Compared with best track centers, root mean square differences ABI-determined centers storms hurricanes, which totals 108 samples, 45.35 29.06 km, respectively. larger average wavenumber-0 amplitude, smaller difference between center. TB-determined close but not identical outermost closed isobar usually coincides where strongest wavenumber 1 asymmetry located. annulus defined by two circles radii asymmetric area described wavenumbers 1–3. In general, amplitudes 0 component centered greater than or equal those from track. For case 60 km distance center, innermost waves 1–3 nicely distributed along within that determined If track, found several distances RIR. positions, important many applications, including specification bogus vortex hurricane initialization verification propagation mechanism Rossby waves.