Hyperspectral SAR

Typical synthetic aperture radar imaging techniques neglect the dispersive nature of the so-called image "reflectivity" function over the bandwidth of the transmitted waveform. In this paper, we form an image of the complex scene reflectivity as it depends on (x, y, and frequency), or equi...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on geoscience and remote sensing 2017-03, Vol.55 (3), p.1682-1695
Main Authors: Ferrara, Matthew, Homan, Andrew J., Cheney, Margaret
Format: Article
Language:English
Subjects:
Antennas
Banding
Dispersion
Image transmission
Imaging
Imaging techniques
Material dispersion
Mathematical model
Mathematical models
Point spread functions
Radar
Radar imaging
Reflectance
Resolution
SAR (radar)
Scattering
structural dispersion
Synthetic aperture radar
synthetic aperture radar (SAR) imaging
Time lag
Waveforms
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Typical synthetic aperture radar imaging techniques neglect the dispersive nature of the so-called image "reflectivity" function over the bandwidth of the transmitted waveform. In this paper, we form an image of the complex scene reflectivity as it depends on (x, y, and frequency), or equivalently (x, y, and time delay), a technique we refer to as hyperspectral synthetic aperture radar (HSAR). Our approach is based on a signal model that allows arbitrary flight trajectories and arbitrary waveforms (including continuously transmitting signals such as noise waveforms), and incorporates the causal, dispersive nature of the scene reflectivity without resorting to resolution-degrading frequency-domain sub-banding as others have previously proposed. We describe the resulting joint time-space resolution of HSAR in terms of the imaging point spread function for a selection of geometries and waveform bandwidths, and provide numerical examples to illustrate the approach.
ISSN:0196-2892
1558-0644
DOI:10.1109/TGRS.2016.2629265