Results 191 to 200 of about 207,009 (229)

An Advanced Azimuth Ambiguity Suppression Scheme for Azimuth Multichannel SAR System

IEEE Geoscience and Remote Sensing Letters
Robert Wang, Pingping Lu, Yonghua Cai
exaly   +3 more sources

Azimuth Ambiguity Suppression for Azimuth Multichannel SAR Based on Subband Rearrangement

IEEE Transactions on Aerospace and Electronic Systems
Ze Yu, Yukun Guo, Xianxun Yao
exaly   +2 more sources

Azimuth ambiguity of multi-channel SAR

2012 IEEE International Geoscience and Remote Sensing Symposium, 2012
Azimuth multi-channel synthetic aperture radar has been widely studied to realize high resolution wide swath imaging. Spectrum reconstruction algorithm deals with the main-lobe aliasing while the side-lobe spectrum still exists and is weighted by the reconstruction network as well.
Xile Ma, Zaoyu Sun, Zhen Dong 0001, Haifeng Huang   +3 more
openaire   +2 more sources

Reconsideration of Azimuth Ambiguities in SAR

IEEE Transactions on Geoscience and Remote Sensing, 1987
The traditional method of specifying and controlling azimuth ambiguities in SAR is through integrated energy balance measures. However, the most frequently observed azimuth ambiguities arise from ensembles of strong point reflectors in the principal sidelobes of the antenna, which in turn are aliased into the processed Doppler bandwidth by the radar ...
R. Keith Raney, G. Julius Princz
openaire   +1 more source

A data fusion approach for the analysis of azimuth ambiguities

2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013
In the context of sea and ocean monitoring from SAR images, this paper illustrates a study of azimuth ambiguities, together with a new approach suggested to solve the problem. The proposed method presents here the added value in application to coastal monitoring and ship detection.
DELLEPIANE, SILVANA, DE MARTINO, MICHAELA, TOMA, MATTEO   +2 more
openaire   +1 more source

Azimuth Ambiguity Detection and Suppression in SAR Images

IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium, 2019
We propose a novel SAR azimuth ambiguity suppression method. The proposed method is a post process for a SAR image; namely, it does not require any modification to the SAR image formation process nor the SAR system design. Noting that the azimuth ambiguity is blurred in the SAR image, the proposed algorithm refocuses the image to focus the azimuth ...
Noboru Oishi, Kei Suwa
openaire   +2 more sources

Eliminating the azimuth ambiguity in reflected S-wave imaging logging based on the azimuthal receiver mode

Journal of Petroleum Science and Engineering, 2021
Abstract Due to the symmetrical directivity of a dipole transducer, dipole reflected S-wave imaging logging results in ambiguous azimuth measurements of reflectors. Based on an orthogonal dipole source and an eight-element azimuthal receiving station, we proposed an improved method for measuring the azimuth of a reflector and applied it to a borehole
Dan Li, Wenxiao Qiao, Xiaohua Che, Xiaodong Ju, Shubo Yang, Junqiang Lu, Baiyong Men   +6 more
openaire   +1 more source

Field azimuth disambiguation using ambiguity-free currents

Solar Physics, 1996
Using the ambiguity-free vertical current defined by Semel and Skumanich (1995) we derive a minimum-current azimuth disambiguation for the observed magnetic field in the active region NOAA 7201. A comparison of such a minimum-current azimuth resolution with those from other extant methods indicates that the resulting resolution, even though found to be
A. Skumanich, M. Semel
openaire   +1 more source

Azimuth depolarization ambiguities in Synthetic Aperture Radar

International Journal of Remote Sensing, 1988
Abstract The effects of target depolarization in measurements made by stationary microwave systems have been extensively investigated. The use of depolarized measurements can provide information not available in the like-polarized measurement alone.
D. H. LUKERT, A. J. BLANCHARD
openaire   +1 more source

Suppression of Azimuth Ambiguities with Constellation of Micro-satellites

2006 CIE International Conference on Radar, 2006
To achieve wide-swath and full azimuth resolution in space-borne Synthetic Aperture Radar (SAR), a space-borne radar usually utilizes low Pulse Repetition Frequency (PRF) with a small aperture in azimuth. Consequently, the azimuth ambiguities are inevitable.
Wei Jing, Mengdao Xing, Zheng Bao
openaire   +1 more source