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Efficient Path Estimation through Parallel Media for Wide-Beam Ice-Sounding Radar

Arenas Pingarron, A; Brennan, P; Corr, H; (2021) Efficient Path Estimation through Parallel Media for Wide-Beam Ice-Sounding Radar. IET Radar, Sonar & Navigation , 14 (10) pp. 1550-1558. 10.1049/iet-rsn.2019.0406. Green open access

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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.

Type: Article
Title: Efficient Path Estimation through Parallel Media for Wide-Beam Ice-Sounding Radar
Open access status: An open access version is available from UCL Discovery
DOI: 10.1049/iet-rsn.2019.0406
Publisher version: http://doi.org/10.1049/iet-rsn.2019.0406
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: emote sensing by radar; airborne radar; radar imaging; synthetic aperture radar
UCL classification: UCL
UCL > Provost and Vice Provost Offices
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UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10100536
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