Title :
Analysis and inversion of ERS-1 image cross-spectra
Author :
Engen, Geir ; Johnsen, Harald
Author_Institution :
NORUT Inf. Technol. Ltd., Tromso, Norway
Abstract :
It is shown that the ERS-1 SAR Image Mode data contains informations that can be used in an inversion scheme to solve the 180 degree ocean wave propagation ambiguity, provided they are properly processed into image cross-spectra. Furthermore, the cross-spectra is shown to be completely free of speckle yielding an improvement in the SNR as compared to the standard 3 look image spectrum of 20 dB. Based on these results it is recommended that future wave mode products (ERS-2) should be based on the image cross-spectrum rather than on the 3 look image spectrum
Keywords :
inverse problems; ocean waves; oceanographic techniques; remote sensing by radar; spaceborne radar; synthetic aperture radar; ERS-1 image cross-spectra; SAR Image Mode data; cross-spectra; direction; image cross-spectra; inverse problem; inversion; measurement technique; ocean wave; propagation ambiguity; radar remote sensing; sea surface; synthetic aperture radar; wave mode product; Azimuth; Data analysis; Differential equations; Fourier transforms; Image analysis; Intensity modulation; Minimization methods; Speckle; Transfer functions; Winches;
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.1995.524050
