Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Robert Crabbs"'
Autor:
Robert Crabbs, Matthew Salfer-Hobbs, Christopher Smith, Bruce Berry, Joseph Coffaro, Larry C. Andrews, Ronald L. Philips
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans IX.
Atmospheric propagation experiments have been conducted over the 1km TISTEF laser range to examine the effects of turbulence, absorption and scattering on a supercontinuum laser beam. This supercontinuum laser beam has been band limited to transmit o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01d9223617ffe9ed2fe9d25bfda4c5f4
https://doi.org/10.1117/12.2570399
https://doi.org/10.1117/12.2570399
Publikováno v:
Journal of the Optical Society of America A. 39:643
With appropriate processing techniques, sonic anemometry can provide useful insights into the strength and spectral shape of optical turbulence. Closed form propagation models and simulations require stationary optical turbulence statistics to make a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3cc0b5e0ec4191662a56475ab938f26f
https://doi.org/10.1364/josaa.441020
https://doi.org/10.1364/josaa.441020
Autor:
Melissa Beason, Larry C. Andrews, Robert Crabbs, Ronald L. Phillips, Joseph Coffaro, Jonathan Spychalsky, Bruce Berry
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans VIII.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8885c30cd58c3bf673523f56815ad571
https://doi.org/10.1117/12.2528050
https://doi.org/10.1117/12.2528050
Autor:
Larry C. Andrews, Franklin Titus, Bruce Berry, Ronald L. Phillips, Jonathan Spychalsky, Joseph Coffaro, Melissa Beason, Robert Crabbs, Frank Sanzone
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans VIII.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f9f153c0abf06193b0ba6c4cc23cb549
https://doi.org/10.1117/12.2526800
https://doi.org/10.1117/12.2526800
Autor:
Robert Crabbs, Melissa Beason, Joseph Coffaro, Franklin Titus, Bruce Berry, Larry C. Andrews, Jonathon Spychalski, Ronald L. Phillips, Frank Sanzone
Publikováno v:
Imaging and Applied Optics 2019 (COSI, IS, MATH, pcAOP).
The Rytov approximation is used with different initial beam radius of curvature in orthogonal directions to approximate optical refractivity with an anisotropic nonKolmogorov spectrum in weak turbulence. Results are compared to experimental data.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc182dd06e27d54cd92e0bb0cd76b671
https://doi.org/10.1364/pcaop.2019.pth2d.2
https://doi.org/10.1364/pcaop.2019.pth2d.2
Autor:
Joseph Coffaro, Robert Crabbs, Jonathan Spychalsky, Bruce Berry, Christopher Smith, Larry C. Andrews, Franklin Titus, Sara B. Belichki, Frank Sanzone, Melissa Beason, Janet E. Shields, Ronald L. Phillips
Publikováno v:
Imaging and Applied Optics 2019 (COSI, IS, MATH, pcAOP).
A single pixel infrared camera is developed utilizing digital micromirror technology. The imager is applied to determination of atmospheric extinction and other meteorological parameters. Experimental evidence demonstrates agreement with forward-scat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56f1f4b1c390207b20782b7d265a1beb
https://doi.org/10.1364/pcaop.2019.pth3c.5
https://doi.org/10.1364/pcaop.2019.pth3c.5
Autor:
Jonathan Spychalsky, Daniel A. Paulson, Nathaniel A. Ferlic, Christopher C. Davis, Miranda van Iersel, Franklin Titus, Joseph Coffaro, Robert Crabbs, John R. Rzasa
Publikováno v:
Imaging and Applied Optics 2019 (COSI, IS, MATH, pcAOP).
Ground to air temperature gradients are the drivers of optical turbulence. Different systems can measure temperature fluctuations. C T 2 and C n 2 are derived from RTD probe systems and sonic anemometers mounted at several heights and compared.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e6f51315a66eebf253997f75079bc6a7
https://doi.org/10.1364/pcaop.2019.pm2c.3
https://doi.org/10.1364/pcaop.2019.pm2c.3
Publikováno v:
Imaging and Applied Optics 2019 (COSI, IS, MATH, pcAOP).
Extensive in situ measurements and modeling initiatives are planned to improve meteorological forecast in support of High Energy Laser (HEL) weapon operations. The key is to understand the atmospheric boundary layer processes affecting optical turbul
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4cb67b111aa820b55c67def0c71ae1c7
https://doi.org/10.1364/pcaop.2019.pm3c.1
https://doi.org/10.1364/pcaop.2019.pm3c.1
Autor:
Larry C. Andrews, Jonathon Spychalsky, Ronald L. Phillips, Robert Crabbs, Franklin Titus, Christopher Smith, Melissa Beason, Joseph Coffaro, Frank Sanzone, Bruce Berry
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans VII.
Researchers from the University of Central Florida recently carried out a series of measurements over a concrete runway and a grass range using a 632.8 nm Gaussian beam propagated for 100 or 125 m at a height of 2 m. Mean intensity and scintillation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::56ff251ca95479024108c9a40ab67a89
https://doi.org/10.1117/12.2323317
https://doi.org/10.1117/12.2323317
Autor:
Joseph Coffaro, John R. Rzasa, Miranda van Iersel, Chensheng Wu, Christopher Smith, Daniel A. Paulson, Christopher C. Davis, Jonathan Ko, Robert Crabbs
Publikováno v:
Laser Communication and Propagation through the Atmosphere and Oceans VII.
We present an experimental evaluation of a multi-aperture laser transmissometer system which profiles long-term laser beam statistics over long paths. While the system was originally designed to measure the aerosol extinction rate, the beam profiling
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::55bce4b440fc90a712b333c96fd1c305
https://doi.org/10.1117/12.2322586
https://doi.org/10.1117/12.2322586