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On Extreme Winds at L-Band with the SMAP Synthetic Aperture Radar

Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA 91109, USA
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The authors are with the Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA. Copyright 2019 California Institute of Technology. Government sponsorship acknowledged.
Remote Sens. 2019, 11(9), 1093; https://doi.org/10.3390/rs11091093
Received: 11 April 2019 / Revised: 30 April 2019 / Accepted: 5 May 2019 / Published: 8 May 2019
(This article belongs to the Special Issue Tropical Cyclones Remote Sensing and Data Assimilation)
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Abstract

In this letter, we discuss some observations of the Soil Moisture Active Passive (SMAP) mission’s high-resolution synthetic aperture radar (SAR) for extreme winds and tropical cyclones. We find that the L-band cross-polarized backscatter is far more sensitive to wind speed at extreme winds than the co-polarized backscatter and it is essential to observations of extreme winds with L-band SAR. We introduce a cyclone wind speed retrieval algorithm and apply it to the limited SMAP SAR dataset of cyclones. We show that the SMAP SAR instrument is capable of measuring extreme winds up to the category 5 (70 m/s) wind speed regime providing unique capabilities as compared to traditional scatterometers with C and Ku-band radars. View Full-Text
Keywords: SMAP; radar; SAR; ocean winds; ocean vector winds; extreme winds; cyclone; hurricane SMAP; radar; SAR; ocean winds; ocean vector winds; extreme winds; cyclone; hurricane
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Fore, A.G.; Yueh, S.H.; Stiles, B.W.; Tang, W.; Hayashi, A.K. On Extreme Winds at L-Band with the SMAP Synthetic Aperture Radar. Remote Sens. 2019, 11, 1093.

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