Impact of atmospheric turbulence on Van Cittert-Zernike speckle cell area estimates

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Simulations of laser beam propagation at 3.5 microns wavelength through atmospheric turbulence are used to characterize on-target irradiance profiles and the Van Cittert-Zemike speckle cell areas associated therewith. Results for a 3 km horizontal path with C{sub N}{sup 2} values between 2.5 {times} 10{sup {minus}14} and 5 {times} 10{sup {minus}13} m{sup {minus}2/3} are compared with those for a 20 km near-vertical slant path for a C{sub N}{sup 2} versus altitude with a near-ground value of 5 {times} 10{sup {minus}-13}m{sup {minus}2/3} and a Huffnagel-Valley type shape. The irradiance fluctuations for the slant path are much smaller than for the shorter horizontal ... continued below

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17 p.

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Morris, J.R. March 17, 1995.

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Simulations of laser beam propagation at 3.5 microns wavelength through atmospheric turbulence are used to characterize on-target irradiance profiles and the Van Cittert-Zemike speckle cell areas associated therewith. Results for a 3 km horizontal path with C{sub N}{sup 2} values between 2.5 {times} 10{sup {minus}14} and 5 {times} 10{sup {minus}13} m{sup {minus}2/3} are compared with those for a 20 km near-vertical slant path for a C{sub N}{sup 2} versus altitude with a near-ground value of 5 {times} 10{sup {minus}-13}m{sup {minus}2/3} and a Huffnagel-Valley type shape. The irradiance fluctuations for the slant path are much smaller than for the shorter horizontal path. The speckle cell area for the slant path is approximately the vacuum-path value; for the 3 km horizontal path it is at most 3 times the vacuum-path value.

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17 p.

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INIS; OSTI as DE95011750

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  • 2. chemical analysis by laser interrogation of proliferation effluents (CALIOPE) meeting, Albuquerque, NM (United States), 28-30 Mar 1995

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  • Other: DE95011750
  • Report No.: UCRL-JC--119948
  • Report No.: CONF-9503149--1
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 80382
  • Archival Resource Key: ark:/67531/metadc738512

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  • March 17, 1995

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  • Oct. 19, 2015, 7:39 p.m.

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  • Feb. 16, 2016, 7:49 p.m.

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Morris, J.R. Impact of atmospheric turbulence on Van Cittert-Zernike speckle cell area estimates, article, March 17, 1995; California. (digital.library.unt.edu/ark:/67531/metadc738512/: accessed November 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.