Paper Info
Title
A Nonparametric Tropical Cyclone Wind Speed Estimation Model Based on Dual-Polarization SAR Observations
Abstract
The C-band synthetic aperture radar (SAR) observation is one of the most popular sources for high-resolution tropical cyclone (TC) wind speed estimation. The scarcity of high wind speed data with good quality restricts the inversion accuracy of high wind speed. It is a challenge to obtain a high-precision wind speed inversion model with sparse data points. In this article, the TC wind speed is successfully estimated from the dual-polarization SAR signal. First, the training dataset with a total of 327 data points is formed using the Sentinel-1A (S-1A) extra-wide / interferometric-wide mode images and their temporal-spatial matched stepped frequency microwave radiometer (SFMR) measurements. Then, a novel Nonparametric TC Wind Speed Estimation model (hereafter NWSE model) is proposed with this dataset by using the Bayesian nonparametric general regression method. The wind speed is interpreted as a function of the cross-polarized normalized radar cross sections and incident angle for the NWSE model. Moreover, the wind speed obtained from the co-polarized signal is used to improve the accuracy of NWSE model under low wind speed. Finally, the validation results show the excellent overall consistency between the model retrieved wind speed and the collocated SFMR and Soil Moisture Active and Passive (SMAP) measurements. Specifically, considering all the wind speeds, the overall root-mean-square error (RMSE) and the absolute bias of NWSE model are 2.85 and 2.26 m/s compared with the SMAP wind speed, respectively. When considering the wind speeds larger than 30 m/s, the RMSE and bias of NWSE model are 3.75 and 2.78 m/s, respectively.
Year
DOI
Venue
2022
10.1109/TGRS.2022.3188328
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
Keywords
DocType
Volume
Wind speed, Synthetic aperture radar, Estimation, Data models, Microwave radiometry, Spatial resolution, Bayes methods, High wind speed estimation, nonparametric modeling, synthetic aperture radar (SAR), tropical cyclone (TC), wind retrieval model
Journal
60
ISSN
Citations 
PageRank 
0196-2892
0
0.34
References 
Authors
0
4
Name
Order
Citations
PageRank
Sheng Wang100.34
Ka-Veng Yuen210814.57
Xiaofeng Yang304.39
Biao Zhang49723.66