2025_proceedings: TES Modelling of TESSMEX Object M32 and M32T

• Session: 17. Target Echo Strength – Measurements and Modelling
  Organised by: David Nunn 
• Lecture: TES Modelling of TESSMEX Object M32 and M32T [[invited]]
  Paper ID: 2130
  Author(s): Elizabeth Chilvers
  Presenter: Elizabeth Chilvers
  Abstract: Target Echo Strength (TES) measurements of TESSMEX object M32 are to be made over a wide range of frequencies at Loch Goil as part of International collaboration during March 2025, building on related measurements of M32T and M32C made in 2022. To contribute to the understanding of scattering from the object, a number of modelling studies are being undertaken. The model predictions should identify features of interest in the measurements, aid analysis and provide mutual validation of both the modelling and measurements. The models use a variety of techniques to examine scatter features of the objects across the frequency spectrum. In particular:\n\n• Kirchhoff Approximation Modelling of the direct scatter from the inner and outer surfaces of M32 combined with modelling of trihedral corner reflectors and support ribs using techniques modified from the field of Radar Cross Section. \n\n• Ray Acoustics Modelling applied at high frequencies to the acoustic scatter (including multiple bounces) from M32 enabling the identification of the causes of significant scatter features. \n\n• Finite Element techniques tackling modelling M32 at a lower frequency. \n
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• Corresponding author: Ms Elizabeth Chilvers
  Affiliation: QinetiQ
  Country: United Kingdom