Full Content is available to subscribers

Subscribe/Learn More  >
Proceedings Article

The aggregate behavior of branch points: branch point density as a characteristic of an atmospheric turbulence simulator

[+] Author Affiliations
Denis W. Oesch, Darryl J. Sanchez, Carolyn M. Tewksbury-Christle, Patrick R. Kelly

Starfire Air Force Research Lab. (USA)

Proc. SPIE 7466, Advanced Wavefront Control: Methods, Devices, and Applications VII, 746606 (August 11, 2009); doi:10.1117/12.829277
Text Size: A A A
From Conference Volume 7466

  • Advanced Wavefront Control: Methods, Devices, and Applications VII
  • Richard A. Carreras; Troy A. Rhoadarmer; David C. Dayton
  • San Diego, CA | August 02, 2009

abstract

The Atmospheric Turbulence Simulator used in testing in the Atmospheric Simulation and Adaptive-optic Laboratory Test-bed at Air Force Research Laboratory, Directed Energy Directorate's Starfire Optical Range is configured based on three characteristics; Fried's parameter, r0, the Rytov number, σ2χ , and the Greenwood Frequency, fG. All three may be estimated from open loop data as a means of verifying the simulated turbulence conditions for a given test configuration. However, unlike r0 and fG, the Rytov number isn't directly calculated. Instead the scintillation index is estimated from intensity measurements. At low Rytov values, (< 0.3 - 0.4), this measurement can approximate the Rytov number, however beyond a Rytov of 0.4 this parameter becomes saturated. Branch Points begin to appear after the Rytov value exceeds 0.1. In this work the behavior of the branch point density is examined to determine its viability as another parameter for calibration our turbulence simulator.

© (2009) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Denis W. Oesch ; Darryl J. Sanchez ; Carolyn M. Tewksbury-Christle and Patrick R. Kelly
"The aggregate behavior of branch points: branch point density as a characteristic of an atmospheric turbulence simulator", Proc. SPIE 7466, Advanced Wavefront Control: Methods, Devices, and Applications VII, 746606 (August 11, 2009); doi:10.1117/12.829277; http://dx.doi.org/10.1117/12.829277


Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).

Figures

Tables

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Proceeding
Sign in or Create a personal account to Buy this proceeding ($15 for members, $18 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.