NDLI: Data interpolation and resampling for a synthetic aperture radar data

Content Provider	IEEE Xplore Digital Library
Author	Kusano, S. Sato, M. Yokota, Y.
Copyright Year	2011
Description	Author affiliation: Tohoku University, Center for Northeast Asian Studies, Japan (Sato, M.; Yokota, Y.) \|\| Tohoku Universtiy, Graduate School of Environmental Studies, Japan (Kusano, S.)
Abstract	In this paper, we introduce interpolation for a detailed observation of synthetic aperture radar (SAR) data. The interpolation is done by zero-padding in the frequency domain. By comparing the raw SAR data and the interpolated data, for example, it is observed that the raw span at a corner reflector we deployed is 0.75 times smaller than its real values. Also, we propose a resampling method applied to the interpolated data to keep data amount same as raw data. The proposed method resamples points where peaks of the span due to coherent targets exist. As for pixels where the peak does not exist, points with the smallest polarimetric entropy are selected. The proposed method is compared to raw data and the resampled data by the maximum filter. It is confirmed that the proposed data emphasizes the characteristics of the raw data. Also, its blurring effect is not as much as that in the resampled data by the maximum filter. This technique is quite basic, however, the effect is not negligible.
Starting Page	652
Ending Page	655
File Size	825127
Page Count	4
File Format	PDF
ISBN	9781457710032
ISSN	21537003
e-ISBN	9781457710056
DOI	10.1109/IGARSS.2011.6049213
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-07-24
Publisher Place	Canada
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Interpolation Entropy Urban areas Synthetic aperture radar Azimuth Scattering Covariance matrix 3dB-pulsewidth synthetic aperture radar resmapling
Content Type	Text
Resource Type	Article

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