Paper Info
Title
Wave Parameter Inversion With Coherent Microwave Radar Using Spectral Proper Orthogonal Decomposition
Abstract
Coherent microwave radar processes sea echoes by using a direct relationship between wave orbital velocity and wave spectrum instead of backscattered intensity to obtain wave parameter. However, the measurements of wave orbital velocity are susceptible to ocean conditions (e.g., low sea state and interference), and thus the method’s performance is often uneven under the mixed conditions. To solve this problem, a novel method for wave parameter inversion based on spectral proper orthogonal decomposition (SPOD) is proposed. The spatial–temporal series of the wave orbital velocities are first processed using SPOD, and a series of expansion coefficients, modes, and eigenvalues can be obtained. Later, the ocean conditions are classified according to the distribution of the eigenvalues, and the truncated frequencies and modes are used to remove nonwave contributions. Finally, wave parameter inversion is performed using the reconstructed spatial–temporal velocities. The proposed method is validated by data from two ocean observation experiments, including coherent S-band radar wave echoes and buoy measurements. The results indicate that the proposed method can discard nonwave contribution and obtain wave parameters in good agreement with buoy measurements regardless of low sea state or mixed ocean conditions.
Year
DOI
Venue
2022
10.1109/TGRS.2022.3203512
IEEE Transactions on Geoscience and Remote Sensing
Keywords
DocType
Volume
Coherent microwave radar,Doppler velocity,ocean remote sensing,spectral proper orthogonal decomposition (SPOD),wave inversion
Journal
60
ISSN
Citations 
PageRank 
0196-2892
0
0.34
References 
Authors
6
6
Name
Order
Citations
PageRank
Jiangheng He100.34
Ze-zong Chen287.42
Chen Zhao3129.75
Xi Chen433370.76
Yunyu Wei500.34
Chunyang Zhang600.34