A Nighttime Structure Model Of Atmospheric Optical Turbulence C2 N Subscript Derived From Thermosonde And High Resolution Rawinsonde Measurements

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A Nighttime Structure Model Of Atmospheric Optical Turbulence C2 N Subscript Derived From Thermosonde And High Resolution Rawinsonde Measurements

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Author : James H. Brown
language : en
Publisher:
Release Date : 1993

A Nighttime Structure Model Of Atmospheric Optical Turbulence C2 N Subscript Derived From Thermosonde And High Resolution Rawinsonde Measurements written by James H. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Atmospheric turbulence categories.

A Nighttime Structure Model Of Atmospheric Optical Turbulence C2 N Subscript Derived From Thermosonde And High Resolution Rawinsonde Measurements

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Author : James H. Brown
language : en
Publisher:
Release Date : 1993

A Nighttime Structure Model Of Atmospheric Optical Turbulence C2 N Subscript Derived From Thermosonde And High Resolution Rawinsonde Measurements written by James H. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Atmospheric turbulence categories.

A Nighttime Structure Model Of Atmospheric Optical Turbulence C2 N Subscript Derived From Thermosonde And High Resolution Rawinsonde Measurements

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Author : James H. Brown
language : en
Publisher:
Release Date : 1993

A Nighttime Structure Model Of Atmospheric Optical Turbulence C2 N Subscript Derived From Thermosonde And High Resolution Rawinsonde Measurements written by James H. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Atmospheric turbulence categories.

A Nighttime Structure Model Of Atmospheric Optical Turbulence C2n Derived From Thermosonde And High Resolution Rawinsonde Measurements

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Author : James H. Brown
language : en
Publisher:
Release Date : 1993

A Nighttime Structure Model Of Atmospheric Optical Turbulence C2n Derived From Thermosonde And High Resolution Rawinsonde Measurements written by James H. Brown and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.

A Nighttime Structure Model Of Atmospheric Optical Turbulence C2 Sub N Derived From Thermosonde And High Resolution Rawinsonde Measurements

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Author :
language : en
Publisher:
Release Date : 1993

A Nighttime Structure Model Of Atmospheric Optical Turbulence C2 Sub N Derived From Thermosonde And High Resolution Rawinsonde Measurements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with categories.

Data from fifteen thermosonde flights was used to develop a simple a simple nighttime structure model of C2 sub n. High resolution rawinsondes provide fine scale estimates of atmospheric temperature gradients and variances of wind speed. Non-linear regression applied between the thermosonde and rawinsonde measurements provides the model C2 sub n estimator. This quasi- empirical model is based upon the theoretical description given by Tatarski and upon an exponentially scaled estimate of a theoretical model of the eddy dissipation rate given by Weinstock. A discussion of previous models and a comparison with the Dewan et al. microshear model is presented. Model profiles computed for other sites and seasons are compared favorably to related thermosonde profiles.

Research Design And Development Study To Measure Atmospheric Optical Turbulence

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Author : Robert S. Hills
language : en
Publisher:
Release Date : 1982

Research Design And Development Study To Measure Atmospheric Optical Turbulence written by Robert S. Hills and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with categories.

This report describes work performed in support of the AFGL program to study atmospheric turbulence and obtain the Atmospheric Optical Structure Constant, C cub N squared. Data is obtained from a thermosonde unit and a radiosonde unit carried aloft by small weather balloons. Improvements in the thermosonde unit and modifications to the radiosonde unit are described. (Author).

The Refractive Index Structure Parameter Atmospheric Optical Turbulence Model Cn2

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Author : Arnold Tunick
language : en
Publisher:
Release Date : 1998

The Refractive Index Structure Parameter Atmospheric Optical Turbulence Model Cn2 written by Arnold Tunick and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.

The CN2 model is a semi-empirical algorithm that makes a quantitative assessment of atmospheric optical turbulence. The algorithm uses surface layer gradient assumptions applied to two levels of discrete vertical profile data to calculate the refractive index structure parameter. Model results can be obtained for unstable, stable, and near-neutral atmospheric conditions. The CN2 model has been benchmarked on data from the REBAL'92 field study. The model will shortly be added to the Electro- Optics Atmospheric Effects Library (EOSAEL). This report gives technical and user's guide information on the CN2 model.

Optical Turbulence And Rawinsonde Measurements For 17 28 September 1989 At Anderson Mesa United States Naval Observatory Flagstaff Arizona

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Author : Gail M. Tirrell Vaucher
language : en
Publisher:
Release Date : 1990*

Optical Turbulence And Rawinsonde Measurements For 17 28 September 1989 At Anderson Mesa United States Naval Observatory Flagstaff Arizona written by Gail M. Tirrell Vaucher and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990* with categories.

The Naval Postgraduate School Atmospheric Optics Group acquired atmospheric optical turbulence and navaid radiosonde (rawinsonde) data in the Flagstaff, Arizona region part of a site survey for a large-scale, ground-based, synthetic aperture system (100-300 m baseline stellar interferometer). From 17 to 25 September 1989, measurements were taken from the Lowell Observatory 31- inch telescope dome facility on Anderson Mesa, 16 km southeast of Flagstaff. Further sampling occurred 26-28 September 1989 from the United States Naval Observatory's (USNO) 61-inch telescope dome, approximately 8 km west of Flagstaff. The parameters measured consisted of transverse coherence lengths, isoplanatic angles, and various meteorological surface and upper-air variables measured from a high resolution, instrumented balloon (rawinsonde) system. This report compiles, analyses and summarizes the acquired data. A summary of the synoptic scale activities occurring simultaneously over the data acquisition sites is also presented.

Atmospheric Turbulence Characteristics Inferred From Optical Measurements At Lick Observatory

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Author : Lawrence William Bradford
language : en
Publisher:
Release Date : 1995

Atmospheric Turbulence Characteristics Inferred From Optical Measurements At Lick Observatory written by Lawrence William Bradford and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Atmospheric turbulence categories.

A Critical Assessment Of Selected Past Research On Optical Turbulence Information In Diverse Microclimates

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Author :
language : en
Publisher:
Release Date : 2002

A Critical Assessment Of Selected Past Research On Optical Turbulence Information In Diverse Microclimates written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.

Due to the increased use of laser and ground-to-satellite communications the need for reliable optical turbulence information is growing. Optical turbulence information is important because it describes an atmospheric effect that can degrade the performance of electromagnetic systems and sensors, e.g., free-space optical communications and infrared imaging. However, critical analysis of selected past research indicates that there are some areas (i.e., data and models) in which optical turbulence information is lacking. For example, line-of-sight, optical turbulence data coupled with atmospheric models in hilly terrain, coastal areas, and within built-up urban areas are few in number or non-existent. In addition, the bulk of existing atmospheric computer models that are being used to provide estimates of optical turbulence are basically one-dimensional in nature and assume uniform turbulence conditions over large areas. Therefore, current optical turbulence theory and models may be critically deficient and in error for inhomogeneous turbulence conditions, such as those that occur in urban environments or environments with changing topography and energy budgets. This paper summarizes selected past research on optical turbulence and the refractive index structure parameter (C2n) in diverse microclimates in an effort to identify deficiencies in the optical turbulence information database and to recommend improvements. The database presented here contains optical turbulence (C2n) information at different wavelengths and for different microclinate environments, e.g., in rural, hilly, desert, mountain-valley, urban, coastal, ocean, and arctic. The database includes several examples of measured and modeled values of C2n in the atmospheric surface and boundary layers.