Multibeam Sonar / Object degradation verification

[woensug-choi]

Q1. What model scale (may need a new model) and model "roughness" would be required to see a difference in sonar data?

Q2. Create a demonstration of A undegraded and B degraded (3D degradation) and show that the sonar data looks "different" - passing the sniff test.

• Classification for the definition of ‘difference’ in the sonar image

  • Macroscopic geometry
    • Changes in object size
  • Acoustic parameters
    • Changes in the acoustic parameters in the sonar (i.e. reflectivity)
    • Deviation in incident angles (which affects amplitude and phase)
  • Microscopic material properties
    • surface roughness
      Note that currently, this is out of the scope for object degradation. There is a rabbit hole we can explore to implement for the seabed. The vocab. ‘roughness’ used in the seabed scattering is something that distinguishes silt and sand.

• Discussions

  Live Document link

• Demonstration of rough features

  Object degradation scenario #33 (comment)

  Multibeam Sonar Wiki - Degraded object detection scenarios

• Distortion mesh statistics discussions

  Mesh statistics for multibeam sonar response to degraded objects dave#187