Title :
Comparison of ocean wave spectra from a non-linear SAR inversion scheme using ERS-1 and SIR-C/X-SAR data sets
Author :
Plant, W.J. ; Hasselmann, S. ; Brüning, C. ; Beal, R.C. ; Monaldo, F.M.
Author_Institution :
Appl. Phys. Lab., Washington Univ., Seattle, WA, USA
Abstract :
Directional ocean wave spectra obtained with a fully non-linear inversion scheme from synthetic aperture radar (SAR) ocean image spectra collected by SARs onboard ERS-1 and the space shuttle (SIR-C/X-SAR) are compared. First results using spectra obtained within 500 km and five hours of each other indicate that the resulting spectral shapes and wave directions agree well. Spectral intensities and significant wave heights, however, are found not to agree well when the theoretical form of a hydrodynamic modulation transfer function (MTF) derived from orbital velocity straining alone is used. Agreement is improved when an empirical hydrodynamic MTF obtained from tower-based measurements is used
Keywords :
inverse problems; ocean waves; oceanographic techniques; remote sensing by radar; spaceborne radar; synthetic aperture radar; SAR; SIR; SIR-C; X-SAR; X-band; frequency distribution; hydrodynamic modulation transfer function; measurement technique; microwave radar; nonlinear inversion scheme; ocean wave direction; ocean wave spectra; remote sensing; significant wave height; space shuttle; spaceborne radar; spectral intensity; spectral shape; synthetic aperture radar; Coherence; Cost function; Extraterrestrial measurements; Hydrodynamics; Intensity modulation; Laboratories; Meteorology; Ocean waves; Physics; Radar imaging; Radar polarimetry; Sea measurements; Space shuttles; Spectral shape; Synthetic aperture radar; Transfer functions;
Conference_Titel :
Geoscience and Remote Sensing Symposium, 1995. IGARSS '95. 'Quantitative Remote Sensing for Science and Applications', International
Conference_Location :
Firenze
Print_ISBN :
0-7803-2567-2
DOI :
10.1109/IGARSS.1995.521734
