Passive method to measure strength of turbulence

Title: Passive method to measure strength of turbulence

Abstract

Disclosed is a method to passively measure and calculate the strength of turbulence via the index of refraction structure constant C.sub.n.sup.2 from video imagery gathered by an imaging device, such as a video camera. Processing may occur with any type computing device utilizing a processor executing machine executable code stored on memory. This method significantly simplifies instrumentation requirements, reduces cost, and provides rapid data output. This method combines an angle of arrival methodology, which provides scale factors, with a new spatial/temporal frequency domain method. As part of the development process, video imagery from high speed cameras was collected and analyzed. The data was decimated to video rates such that statistics could be computed and used to confirm that this passive method accurately characterizes the atmospheric turbulence. C.sub.n.sup.2 accuracy from this method compared well with scintillometer data through two full orders of magnitude and more capability is expected beyond this verification.

Inventors:: O'Neill, Mary Morabito; Terry, David

Issue Date:: 2019-08-20

Research Org.:: Nevada National Security Site/Mission Support and Test Services LLC

Sponsoring Org.:: USDOE

OSTI Identifier:: 1568761

Patent Number(s):: 10,389,940

Application Number:: 15/201,306

Assignee:: Mission Support and Test Services, LLC (Las Vegas, NV)

DOE Contract Number:: AC52-06NA25946

Resource Type:: Patent

Resource Relation:: Patent File Date: 07/01/2016

Country of Publication:: United States

Language:: English

Citation Formats


                    O'Neill, Mary Morabito, and Terry, David. Passive method to measure strength of turbulence.  United States: N. p., 2019. 
        Web.

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                    O'Neill, Mary Morabito, & Terry, David. Passive method to measure strength of turbulence.  United States.

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                    O'Neill, Mary Morabito, and Terry, David. Tue .  
        "Passive method to measure strength of turbulence".  United States.  https://www.osti.gov/servlets/purl/1568761.

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@article{osti_1568761,

  title        = {Passive method to measure strength of turbulence},

  author       = {O'Neill, Mary Morabito and Terry, David},

  abstractNote = {Disclosed is a method to passively measure and calculate the strength of turbulence via the index of refraction structure constant C.sub.n.sup.2 from video imagery gathered by an imaging device, such as a video camera. Processing may occur with any type computing device utilizing a processor executing machine executable code stored on memory. This method significantly simplifies instrumentation requirements, reduces cost, and provides rapid data output. This method combines an angle of arrival methodology, which provides scale factors, with a new spatial/temporal frequency domain method. As part of the development process, video imagery from high speed cameras was collected and analyzed. The data was decimated to video rates such that statistics could be computed and used to confirm that this passive method accurately characterizes the atmospheric turbulence. C.sub.n.sup.2 accuracy from this method compared well with scintillometer data through two full orders of magnitude and more capability is expected beyond this verification.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {2019},

  month        = {8}

}

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Works referenced in this record:

Method for path-averaged cross-wind measurement
patent, March 2010

Shapira, Joseph
US Patent Document 7,685,873
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=7685873

Scintillometer for the measurment of the structure function constant and the inner scale of atmospheric refractive index fluctuations
patent, April 1994

Thierman, Volker
US Patent Document 5,303,024
URL: http://patft.uspto.gov/netacgi/nph-Parser?patentnumber=5303024

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Title: Passive method to measure strength of turbulence

Abstract

Citation Formats

Method for path-averaged cross-wind measurement patent, March 2010

Scintillometer for the measurment of the structure function constant and the inner scale of atmospheric refractive index fluctuations patent, April 1994

Method for path-averaged cross-wind measurement
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patent, April 1994