We thank Jeff Hawkins for providing an earlier version of his secondary eyewall database and for his assistance with the microwave imagery. The microwave imagery is provided by the Naval Research Laboratory in Monterey, California. We’re grateful to Dave Nolan, Chris Rozoff, John Knaff, Mark DeMaria, and Chris Velden for many useful discussions; and to Howard Berger for his contributions to an earlier version of this work. We also thank Mark DeMaria for providing the SHIPS developmental dataset. This work is supported under the NOAA GOES-R Risk Reduction project and by the Office of Naval Research under Grant N00014-07-1-0163. Earlier work related to this project was funded by the NOAA Hurricane Supplemental Research Program and NRL-MRY Satellite Applications Grant N00173-01-C-2024.
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