1 / 15

Underwater Radiance Field with Dynamic Surface Waves

Underwater Radiance Field with Dynamic Surface Waves. George W. Kattawar and Yu You Department of Physics Texas A&M University. Outline. Methods A “realistic” surface wave model Underwater radiance field with dynamic surface waves

claudio-crowe
Download Presentation

Underwater Radiance Field with Dynamic Surface Waves

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Underwater Radiance Field with Dynamic Surface Waves George W. Kattawar and Yu You Department of Physics Texas A&M University

  2. Outline • Methods • A “realistic” surface wave model • Underwater radiance field with dynamic surface waves • Image of an object above the surface with dynamic surface waves

  3. Methods - the Matrix Operator (MO) Method Z Atmosphere, Slow Changing Part Ocean Wave, Fast Changing part Detector Ocean, Slow Changing Part Lambertian Ocean Bottom X

  4. Methods - Previous Work • The MO code validated for a plane-parallel system • MO simulations of system with 1-D and 2-D sinusoidal surface waves • Needs measurements of surface wave slopes for further simulation

  5. A “Realistic” Surface Wave Model • Modeling of gravity waves and swells using the power spectral density (PSD) approach. Schwenger and Repasi, Proc. of SPIE, 5075, 72 (2003) : Phases are generated with a Gaussian distribution

  6. A “Realistic” Surface Wave Model Simulated Gravity Waves Wind speed: W = 5 m/s Wind speed: W = 10 m/s Area: 21 m x 21 m

  7. A “Realistic” Surface Wave Model Comparison with Cox-Munk Results Lines - Direct Monte Carlo results using the Cox-Munk model Symbols - MO results with “realistic” surface waves (averaged over 225 grids) Atmosphere: Rayleigh = 0.25,  = 0.5 Ocean: H-G, g = 0.95  = 10,  = 0.5 Bottom: Lambertian  = 0.5 Detector:  = 0.001 SZA = 0 degree Atmosphere & ocean: 15 x 15 grids Interface: 255 x 255 grids

  8. A “Realistic” Surface Wave Model Simulated Gravity Waves and Swells Wind speed: W = 10 m/s

  9. Underwater radiance field with dynamic surface waves Radiance at Various Depths det 0.001 1 2 5

  10. Underwater radiance field with dynamic surface waves Q Component at Various Depths det 0.001 1 2 5

  11. Underwater radiance field with dynamic surface waves U Component at Various Depths det 0.001 1 2 5

  12. Image of an object with dynamic surface waves Image of a Disk - Flat surface det = 1 A disk just above the ocean surface r = 4.5 m

  13. Image of an object with dynamic surface waves A Dynamic Ocean Surface det = 1 r = 4.5 m det = 2

  14. Image of an object with dynamic surface waves A Smaller Disk - Flat Surface Radius of the disk:  (inner circle) det = 5 Foot print of the Snell’s cone: 5.62 m (outer circle)

  15. Image of an object with dynamic surface waves A Smaller Disk - Dynamic Ocean Radius of the disk:  (inner circle) det = 5 Foot print of the Snell’s cone: 5.62 m (outer circle)

More Related