Sea Surface Roughness Determination from GNSS Ocean Scatterometry

Hans-Henrik von Benzon*, Per Høeg

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A wave propagator, used to simulate Global Navigation Satellite Systems (GNSS) reflected signals from ocean surfaces, is presented and results are discussed. The wave propagator simulates the characteristics of a bi-static scattering system. The wave propagation is performed using a full-wave solution to a parabolic equation approximating the electromagnetic wave equation. The parabolic equation in the simulator is solved using the split-step sine transformation. The Earth’s surface is modeled with the use of an impedance model. The impedance concept gives an accurate lower boundary condition in the determination of the electromagnetic field, thus making it possible to simulate reflections and the effects of transitions between different media. Simulated GPS ocean surface reflections for different ocean characteristics will be presented and analyzed.The analysis of the simulated surface reflection signals will in general reveal spectral structures ofthe reflected signals that lead to the extraction of sea surface roughness, and surface wind speed.
Original languageEnglish
JournalScience Bulletin
Number of pages15
ISSN0036-8261
Publication statusSubmitted - 2021

Keywords

  • Wave propagation
  • Reflections
  • Reflectometry
  • Sea surface
  • Sea surface electromagnetic scattering
  • Fourier transforms
  • Geophysical signal processing

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