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On Quad-Polarized SAR Measurements of the Ocean Surface.
- Source :
- IEEE Transactions on Geoscience & Remote Sensing; Nov2019, Vol. 57 Issue 11, p8362-8370, 9p
- Publication Year :
- 2019
-
Abstract
- This paper provides improved quantitative estimates of the wind-ruffled roughness contributions to dual co- and cross-polarized radar signals. Expanding previous approaches, 1696 RADARSAT-2 quad-polarized synthetic aperture radar (SAR) measurements, co-located with 65 in situ National Data Buoy Center (NDBC) buoy observations, are analyzed. Considering all wind conditions, the impact of breaking and near-breaking waves on dual co- and cross-polarized radar signals is robustly documented. For VV polarized measurements, the contribution of breaking waves decreased from 60% to 20% with increasing incidence angle, whereas for HH polarization and cross-polarization measurements, it can amount to about 60%–70% for all incidence angles. Building on the large analyzed data set, robust empirical dependencies between breaking waves and their impact on co- and cross-pol signals are then derived, as functions of wind speeds, incidence angles, and azimuth directions. [ABSTRACT FROM AUTHOR]
- Subjects :
- SYNTHETIC aperture radar
RADAR meteorology
OCEAN waves
BIG data
WIND speed
OCEAN
Subjects
Details
- Language :
- English
- ISSN :
- 01962892
- Volume :
- 57
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Geoscience & Remote Sensing
- Publication Type :
- Academic Journal
- Accession number :
- 140084404
- Full Text :
- https://doi.org/10.1109/TGRS.2019.2920750