نتایج جستجو برای: Azimuth Offset

تعداد نتایج: 28760  

2012
M. Iqbal J. Chen W. Yang P. Wang B. Sun

Spaceborne synthetic aperture radar (SAR) plays more and more important role in Earth observation science, especially with ScanSAR mode which provides wide-swath coverage with moderate resolution. However, scalloping and inter-scan banding (ISB) are two major artifacts, which significantly degrade the quality of ScanSAR images. In this paper, a novel technique for removal of scalloping and ISB ...

1999
Biondo Biondi

Offset plane wave migration and common-azimuth migration are among the most promising wave-equation migration methods for efficiently imaging 3-D marine data sets. Offset plane wave migration has some computational advantages over common-azimuth migration, but common-azimuth is more accurate. Sub-salt images produced by commonazimuth migration are better focused than the corresponding images pr...

2001
Biondo Biondi

Analysis of common-azimuth migration for vertically layered media shows that downward continuing the data in a narrow strip around the zero crossline offset should yield a kinematically correct migration scheme. I introduce two migration methods that exploit the common-azimuth equations to define an optimal range of crossline-offset wavenumbers and thus to minimize the number of crossline offse...

Journal: :Remote Sensing 2017
Pablo Sánchez-Gámez Francisco J. Navarro

The Terrain Observation by Progressive Scans (TOPS) acquisition mode of the Sentinel-1 mission provides a wide coverage per acquisition with resolutions of 5 m in range and 20 m in azimuth, which makes this acquisition mode attractive for glacier velocity monitoring. Here, we retrieve surface velocities from the southern Ellesmere Island ice caps (Canadian Arctic) using both offset tracking and...

2003
Biondo Biondi

I introduce a new migration method that overcomes the limitations of common-azimuth migration while retaining its computational efficiency for imaging marine streamer data. The method is based on source-receiver downward-continuation of the prestack data with a narrow range of cross-line offsets. To minimize the width of the cross-line offset range, while assuring that all the recorded events a...

Journal: :Journal of Geophysics and Engineering 2022

Abstract The sharp increase in data size of the high-density and wide-azimuth seismic acquisition makes processing routines very challenging. To reduce turn-around time pre-stack migration (PSTM) for large-scale field (terra to petabyte size), we present an efficient wave-equation PSTM that is approximate version double-square-root (DSR) moderate lateral velocity variation. By converting DSR di...

2001
Robert G. Clapp

It is well known that the inverse problem of estimating interval velocities from reflection data is poorly constrained in 2-D. We show that the interval velocity estimation problem in 3-D is much better constrained when the velocity function is estimated by jointly inverting the data collected along multiple offset-azimuth, even when the azimuth range is fairly limited. We extend to 3-D the lin...

Journal: :Journal of Geophysics and Engineering 2021

Abstract To improve the imaging quality of wide-azimuth seismic data and enhance uniformity attributes between adjacent bins, we developed a novel interpolation method in offset-vector tiles (OVT) domain for data. The orthogonal matching pursuit (OMP) based on Fourier transform is frequency-domain processing technique discrete that achieves goal anti-aliasing by extracting weight factor effecti...

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