Title :
A comparison of ocean wave-radar modulation transfer functions at different radar frequencies and polarizations determined from tower and aircraft measurements
Author :
Alpers, Werner ; Schmidt, A. ; Schmidt, Anke ; Brüning, Claus
Author_Institution :
Inst. of Oceanogr., Hamburg Univ., Germany
Abstract :
For the inversion of SAR image spectra into ocean wave spectra the ocean wave-radar modulation transfer function (MTF) plays an important role for waves traveling in or near the range direction. MTFs can be measured from sea-based platforms or inferred from the comparison of measured and simulated SAR image spectra. The MTFs determined by the two experimental methods have comparable moduli, but different phases. Also they do not agree with the values derived from various modulation theories. A short summary of the present status is given and possible reasons for the observed discrepancies are discussed
Keywords :
backscatter; electromagnetic wave scattering; ocean waves; oceanographic techniques; radar cross-sections; radar polarimetry; remote sensing; remote sensing by radar; synthetic aperture radar; SAR; backscatter; measurement technique; modulation theory; ocean wave; ocean wave spectra; polarization; radar modulation transfer function; radar polarimetry; radar remote sensing; radar scattering; range direction; sea surface; Aircraft; Doppler radar; Frequency; Ocean waves; Polarization; Radar antennas; Radar imaging; Radar measurements; Sea measurements; 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.1995.521146
