Development Of Extinction Imagers For The Determination Of Atmospheric Optical Extinction

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Development Of Extinction Imagers For The Determination Of Atmospheric Optical Extinction

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Author : Atmospheric Optics Group
language : en
Publisher:
Release Date : 2014

Development Of Extinction Imagers For The Determination Of Atmospheric Optical Extinction written by Atmospheric Optics Group and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Light absorption categories.

The primary goals of this project for JTO and ONR (Grant N00014-07-1-1060) were to further develop Extinction Imagers for use in the ocean environment, and to extend the capabilities into the Short Wave IR (SWIR). Extinction Imaging is a method for determining the effective extinction coefficient over an extended path using a sensor at one end of the path. It uses calibrated imagers to acquire the relative radiance of a dark target near the other the end of the path and the horizon sky in the direction of the dark target. It is completely passive and thus covert, and the hardware is robust and relatively inexpensive. It uses rigorous equations, which determine the extinction coefficient from the measured apparent contrast of the radiance of the dark target with respect to the horizon sky. The project was very successful. We found that the ocean surface could readily be used as a dark target in red and SWIR wavelengths. Both the red and the SWIR measurement results were excellent for daytime. Comparisons with standard instruments, as well as uncertainty analysis, indicated that extinction imagers provide better measurements of the atmospheric extinction losses over extended paths than other methods of which we are aware. Our secondary goals were to address the night regime, and to address slanted paths above the horizontal. Regarding night, we found that the visible sensor acquired excellent data, but the ocean surface was not a good dark target in our wavelengths. Recommendations on the handling of night are given in the report. Regarding the lines of sight above the horizon, we developed a slant path algorithm that determines beam transmittance. It performed very well. Recommendations are made regarding integration of these techniques for military applications

Earth Resources

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Author :
language : en
Publisher:
Release Date : 1976

Earth Resources written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Astronautics in earth sciences categories.

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1995

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Technical Abstract Bulletin

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Author :
language : en
Publisher:
Release Date : 1967

Technical Abstract Bulletin written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Science categories.

Fourth International Microgravity Combustion Workshop

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Author :
language : en
Publisher:
Release Date : 1997

Fourth International Microgravity Combustion Workshop written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Combustion categories.

Government Wide Index To Federal Research Development Reports

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Author :
language : en
Publisher:
Release Date : 1966

Government Wide Index To Federal Research Development Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Government publications categories.

Propagation And Imaging Through The Atmosphere

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Author :
language : en
Publisher:
Release Date : 1998

Propagation And Imaging Through The Atmosphere written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with Aerosols categories.

Fundamentals Of Electro Optic Systems Design

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Author : Sherman Karp
language : en
Publisher: Cambridge University Press
Release Date : 2013

Fundamentals Of Electro Optic Systems Design written by Sherman Karp and has been published by Cambridge University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Science categories.

Presents practical electro-optical applications in the context of the fundamental principles of communication theory, thermodynamics, information theory and propagation theory. Combining systems issues with fundamentals of communications, this is an essential reference for all practising engineers and academic researchers in optical engineering.

Nasa Technical Memorandum

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Author :
language : en
Publisher:
Release Date : 1992

Nasa Technical Memorandum written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992 with Aeronautics categories.

Urban Air Pollution Monitoring By Ground Based Stations And Satellite Data

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Author : Mikalai Filonchyk
language : en
Publisher: Springer
Release Date : 2018-05-11

Urban Air Pollution Monitoring By Ground Based Stations And Satellite Data written by Mikalai Filonchyk and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-05-11 with Science categories.

This book examines air pollution of a big city using multi-year and multi-season data from ground-based air monitoring stations and satellite sounding data, which provides more clear and detailed information on the main sources of air pollution, the long-term trend of pollution, the influence of meteorological parameters on pollution levels, and trajectories of polluted air masses. For example, the book shows that particulate matter from local sources is transported from deserts to create air quality challenges. It also analyzes the effects of desert and semi-desert landscapes on high concentrations of pollutants.