| 講演抄録／キーワード |
| 講演名 |
2005-03-05 09:50
On the cross-correlation of spackle patterns in multilook SAR images of dynamic sea surfaces
○Kazuo Ouchi・Haipeng Wang（Kochi Univ. of Tech.） |
| 抄録 |
（和） |
This paper describes the theory and experimental result on the cross-correlation function (CCF) of speckle patterns in multilook synthetic aperture radar (SAR) images of sea surface processed with partially overlapped subapertures. The integral expression for the speckle cross-correlation function is derived and discussed. It is shown that, under the white noise approximation for the backscattered field, the CCF of the interlook speckle intensity patterns is given by the squared modulus of the autocorrelation function of the amplitude weighting function of subapertures; and that the CCF of the interlook speckle patterns is independent of the surface coherence time of sea surface. The integral expression for the intensity CCF is then evaluated for a rectangular weighting function, and comparison is made with the JERS-1 L-band and RADARSAT-1 C-band SAR images of sea surface to test the theory. The CCFs computed from the JERS-1 SAR data show excellent agreement with the theory, and good agreement is obtained with the RADARSAT-1 data. |
| （英） |
This paper describes the theory and experimental result on the cross-correlation function (CCF) of speckle patterns in multilook synthetic aperture radar (SAR) images of sea surface processed with partially overlapped subapertures. The integral expression for the speckle cross-correlation function is derived and discussed. It is shown that, under the white noise approximation for the backscattered field, the CCF of the interlook speckle intensity patterns is given by the squared modulus of the autocorrelation function of the amplitude weighting function of subapertures; and that the CCF of the interlook speckle patterns is independent of the surface coherence time of sea surface. The integral expression for the intensity CCF is then evaluated for a rectangular weighting function, and comparison is made with the JERS-1 L-band and RADARSAT-1 C-band SAR images of sea surface to test the theory. The CCFs computed from the JERS-1 SAR data show excellent agreement with the theory, and good agreement is obtained with the RADARSAT-1 data. |
| キーワード |
（和） |
speckle / synthetic aperture radar / cross-correlation / scene coherence time / sea surface / / / |
| （英） |
speckle / synthetic aperture radar / cross-correlation / scene coherence time / sea surface / / / |
| 文献情報 |
信学技報, vol. 104, no. 699, SANE2004-118, pp. 13-18, 2005年3月. |
| 資料番号 |
SANE2004-118 |
| 発行日 |
2005-02-26 (SANE) |
| ISSN |
Print edition: ISSN 0913-5685 |
| PDFダウンロード |
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