UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Refraction Angle Calculation in Multilayered Ice for Wide-beam Airborne Radar

Arenas-Pingarron, A; Brennan, P; Core, H; (2018) Refraction Angle Calculation in Multilayered Ice for Wide-beam Airborne Radar. In: (Proceedings) International Geoscience and Remote Sensing Symposium IGARSS2018. (In press).

[img] Text
IGARSS18_aap_4May_2.pdf - ["content_typename_Accepted version" not defined]
Access restricted to UCL open access staff until 14 December 2018.

Download (1MB)

Abstract

We propose an algorithm to calculate the refraction path travelled by a signal from a source to a remote scatterer, through a horizontally parallel multilayer medium with vertical-varying refractive index. The exact solution in a simple two-layered medium requires solving a degree-4 polynomial according to Snell’s law, meaning a timedemanding solution. For narrow-beam sources a small-angle approximation is commonly used. In this new technique, we transformed the governing equations until the system can be solved by intersection of two curves. As these are monotonic with opposite slope, the crossing point can be estimated by iteration, with a minimum search algorithm. This method has been applied to focus synthetic aperture radar images of the Antarctic bedrock, improving the detected response in the wide-beam case, and reducing time regarding to compute the polynomial solution.

Type: Proceedings paper
Title: Refraction Angle Calculation in Multilayered Ice for Wide-beam Airborne Radar
Event: International Geoscience and Remote Sensing Symposium IGARSS2018
Location: Valencia, Spain
Dates: 22 July 2018 - 26 July 2018
Publisher version: https://ieeexplore.ieee.org/Xplore/home.jsp
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: Back-projection, radar, refraction, SAR, Snell’s law
URI: http://discovery.ucl.ac.uk/id/eprint/10050052
Downloads since deposit
1Download
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item