NDLI: Efficient path estimation through parallel media for wide-beam ice-sounding radar

Content Provider	IET Digital Library
Author	Pingarrón, Álvaro Arenas Brennan, Paul V. Corr, Hugh
Abstract	The authors propose an algorithm to estimate the path followed by refracted signals from a source to a target, through a medium formed by uniform parallel layers with known different refractive indices, a common model used for ice radio-echo sounding. The analytical solution is a polynomial with a degree that exponentially depends on the number of layers, being computationally inefficient. For low incidence angles, the small-angle approximation can be used to avoid the polynomial. In their technique, they normalise the governing equations to obtain a framework where to find a narrow angular interval containing the solution, finally estimated interpolating the boundaries. The new approach improves the results regarding the small-angle approximation for a wider angular range at a slightly higher computational time. This method has been applied to focus airborne synthetic aperture radar images for deep ice sounding, reducing the calculation time and improving the detected response in wide beam and squinted geometries, used for high along-track resolution or the detection of sloping internal layers.
Starting Page	1550
Ending Page	1558
Page Count	9
ISSN	17518784
Volume Number	14
e-ISSN	17518792
Issue Number	Issue 10, Oct (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/14/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2019.0406
Journal	IET Radar, Sonar & Navigation
Publisher Date	2020-06-12
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Airborne Radar Airborne Synthetic Aperture Radar Image Analytical Solution Common Model Deep Ice Sounding Efficient Path Estimation Governing Equation Ice Radio-echo Sounding Instrumentation And Technique For Geophysical, Hydrospheric And Lower Atmosphere Research Internal Layer Known Different Refractive Indices Low Incidence Angles Narrow Angular Interval Optical, Image And Video Signal Processing Parallel Media Radar Equipment Radar Imaging Refracted Signal Remote Sensing by Radar Slightly Higher Computational Time Small-angle Approximation Synthetic Aperture Radar System And Application Uniform Parallel Layer Wide Beam Wide-beam Ice-sounding Radar Wider Angular Range
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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