1 / 29

Recent Argus Developments In North America Rob Holman SECNAV/CNO Chair in Oceanography

Recent Argus Developments In North America Rob Holman SECNAV/CNO Chair in Oceanography Oregon State University. Tessellation Arrays and NCEX Sensor Quality and Resolution Objective Focusing Recent Stereo Results Argus III Cross-geom. Hurricane Isabel, Duck, 09/18/03.

lavey
Download Presentation

Recent Argus Developments In North America Rob Holman SECNAV/CNO Chair in Oceanography

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. Recent Argus Developments In North America Rob Holman SECNAV/CNO Chair in Oceanography Oregon State University • Tessellation Arrays and NCEX • Sensor Quality and Resolution • Objective Focusing • Recent Stereo Results • Argus III • Cross-geom Hurricane Isabel, Duck, 09/18/03

  2. Note that these techniques are in development and aren’t yet available for release.

  3. Argus and the NCEX Field Experiment NCEX = Nearshore Canyon Experiment,

  4. C1 C2 C3 NCEX Argus Coverage

  5. Pixel Instrument Coverage (example)

  6. Packing of Alpha Arrays into a Tessilation Tile

  7. shoreline NCEX Tessellation Array Resolution limited (5 m) tile 1842 pixels

  8. Directional Spectrum Example f < 0.33 Hz, k-2 normalized.

  9. Tessellation Arrays • Produce wave directional spectrum at any location • Query at an array of locations • Extract simple statistics (peak direction?) • Use same lag array for depth estimation

  10. NCEX Array, 09/03

  11. NCEX Array, 09/03 (blow-up) Runup Vbar Tess (alpha and bathy “Old” Bathy Line

  12. Vertically-displaced Stereo C1, z = 43.1 m C1, z = 28.2 m

  13. Stereo Profile Test Update 08/14/03 Survey courtesy of the FRF

  14. Lens Quality Modulation Transfer Function (MTF) • Ratio of the spectrum of a sensed signal to the source • Measures the quality of the CCD chip as well as the lens • Test image is random noise image (looks gray) Ideal Real 1.0 1.0 Spectra density Spectra density wavenumber wavenumber

  15. Modulation Transfer Function (MTF) not Scaled to show number of “effective pixels” at roll-off Effect of “sharp” setting

  16. Objective Lens Focusing? Can we use the spectral fall-off in an image to tell when the focus of a lens is optimum?

  17. Objective Lens Focusing + + + + Focus was slowly adjusted through a sequence of images

  18. Argus III Upgrade (North America) Argus II Argus III

  19. Argus Collection Strategies Argus III Argus II

  20. Crossgeom GCP’s in view No GCP’s Autogeom Crossgeom

  21. Crossgeom Use overlapping, high-contrast area of snapshots as temporary template (requires Argus III for synchronous snaps)

  22. Longshore Current? v, longshore current x, cross-shore y, alongshore

  23. Field Test • Mean currents

  24. Field Test

  25. Field Test • Surface dynamics • Alongshore wind stress • Alongshore roller stress z y

  26. Field Test • Alongshore wind stress

  27. Questions? Not a hurricane Hurricane

More Related