Propagation of Visible and Infrared Radiation in Fog, Rain, and Snow PDF Download
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Author: L. W Winchester (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 103
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Book Description
Measurements of the attenuation of radiation at 0.6328, 1.06, and 8 to 12 micrometers by fog, rain, and snow are reported. Theoretical models are presented which account for the scattering properties of fog droplets, raindrops, and snow crystals at each wavelength. Attenuation by fog in the 8 to 12 micrometer band is shown to be a function of the liquid water content of the fog while attenuation at 0.6328 micrometers is a function of both liquid water content and the fog droplet size distribution. It is shown that not only must the scattering properties of rain drops and snow crystals be properly modeled, but the susceptibility of the experimental instruments to scattered radiation must also be known.
Author: L. W Winchester (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 103
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Book Description
Measurements of the attenuation of radiation at 0.6328, 1.06, and 8 to 12 micrometers by fog, rain, and snow are reported. Theoretical models are presented which account for the scattering properties of fog droplets, raindrops, and snow crystals at each wavelength. Attenuation by fog in the 8 to 12 micrometer band is shown to be a function of the liquid water content of the fog while attenuation at 0.6328 micrometers is a function of both liquid water content and the fog droplet size distribution. It is shown that not only must the scattering properties of rain drops and snow crystals be properly modeled, but the susceptibility of the experimental instruments to scattered radiation must also be known.
Author: Vladimir Evseevich Zuev
Publisher: John Wiley & Sons
ISBN:
Category : Science
Languages : en
Pages : 452
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 892
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Book Description
Author: L. W Winchester (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 59
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Book Description
An integrated model of target vehicle signatures must include a description of the effect of transmission of electromagnetic radiation through the atmosphere between the target and the threat sensor devices. A number of models published by various investigators are in use to describe this transmission phenomenon. These models predict fairly accurately the attenuation of light as it propagates through clear air, indicating that they account for the molecular absorption reasonably well. They are not as accurate when the atmosphere contains small particles such as those in rain, fog, snow, etc. In adverse atmospheric conditions, the scattering process becomes comparatively more important and must also be considered. In this report, a detailed investigation is presented for the scattering of infrared radiation by atmospheric aerosols. The theoretical analysis is compared to the measured data obtained at the Keweenaw Research Center (KRC). The analysis and the results are compared to the prediction of other available models. In addition, the implication of the present work on the ongoing TACOM/KRC modeling effort of target signature is discussed.
Author:
Publisher:
ISBN:
Category : Infrared technology
Languages : en
Pages : 330
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Book Description
Author:
Publisher:
ISBN:
Category : Infrared technology
Languages : en
Pages : 428
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Book Description
Author: Vladimir Evseevic Zuev
Publisher:
ISBN:
Category :
Languages : de
Pages : 405
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Book Description
Author: U.S. Air Force Geophysics Laboratory
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 218
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Book Description
Author: Alastair D. McAulay
Publisher: John Wiley & Sons
ISBN: 0470255609
Category : Technology & Engineering
Languages : en
Pages : 336
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Book Description
Recent advances in ultra-high-power lasers, including the free-electron laser, and impressive airborne demonstrations of laser weapons systems, such as the airborne laser, have shown the enormous potential of laser technology to revolutionize 21st century warfare. Military Laser Technology for Defense, includes only unclassified or declassified information. The book focuses on military applications that involve propagation of light through the atmosphere and provides basic relevant background technology. It describes high-power lasers and masers, including the free-electron laser. Further, Military Laser Technology for Defense addresses how laser technology can effectively mitigate six of the most pressing military threats of the 21st century: attack by missiles, terrorists, chemical and biological weapons, as well as difficulty in imaging in bad weather and threats from directed beam weapons and future nuclear weapons. The author believes that laser technology will revolutionize warfare in the 21st century.
Author: Vincent J. Falcone
Publisher:
ISBN:
Category : Atmosphere
Languages : en
Pages : 80
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Book Description
Atmospheric attenuation of millimeter and submillimeter waves is calculated for clear, fog, cloud and rain atmospheres. The frequency range considered is 1-1000 GHz. The clear atmospheres transmission spectra is calculated by a computer efficient algorithm of AFGL's HITRAN code. This new code is called FASCODE-1. The hydrometeor attenuation of fog, clouds and rain (precipitation), calculated by Mie scattering is addend to FASCODE-1. Models of fog, clouds and rain typical of mid-latitude temperate regions are used in calculations of transmission and attenuation.
