Haze-free and Cloud-free Lines-of-sight Through the Atmosphere PDF Download
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Author: Iver A. Lund
Publisher:
ISBN:
Category : Haze
Languages : en
Pages : 28
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Book Description
Clear and cloud-free line-of-sight probabilities have been derived from analysis of: (1) Whole-sky photographs, (2) visual sky cover observations, (3) jointly observed sky cover and sunshine, (4) satellite observations and (5) in-flight observations. The most accurate probabilities of cloud-free lines-of- sight through the entire atmosphere can be obtained from a model derived from several thousand whole-sky photographs and visual sky cover observations. The most accurate probabilities of both cloud-free and haze-free conditions through the entire atmosphere, or protions of the atmosphere, or portions of the atmosphere, can be obtained from the in-flight observations.
Author: Iver A. Lund
Publisher:
ISBN:
Category : Haze
Languages : en
Pages : 28
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Book Description
Clear and cloud-free line-of-sight probabilities have been derived from analysis of: (1) Whole-sky photographs, (2) visual sky cover observations, (3) jointly observed sky cover and sunshine, (4) satellite observations and (5) in-flight observations. The most accurate probabilities of cloud-free lines-of- sight through the entire atmosphere can be obtained from a model derived from several thousand whole-sky photographs and visual sky cover observations. The most accurate probabilities of both cloud-free and haze-free conditions through the entire atmosphere, or protions of the atmosphere, or portions of the atmosphere, can be obtained from the in-flight observations.
Author: Eugene A. Bertoni
Publisher:
ISBN:
Category : Aeronautics in meteorology
Languages : en
Pages : 346
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Book Description
Author: Eugene A. Bertoni
Publisher:
ISBN:
Category : Aeronautics in meteorology
Languages : en
Pages : 26
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Book Description
Author: Iver A. Lund
Publisher:
ISBN:
Category : Atmospheric models
Languages : en
Pages : 22
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Book Description
For a period of more than 6 years, aircrews made observations of the presence, or absence, of clouds on lines-of-sight between the aircraft and the surface of the earth. These observations were used to estimate the probability of a cloud-free line-of-sight (CFLOS) from a given altitude at a given angle. The probabilities obtained from observations in the vicinity of six stations in the United States were compared with probabilities estimated from routine sky-cover observations taken by weather observers at these stations. A model was used to transform sky-cover observations to CFLOS probabilities. The estimates obtained from the model were generally higher than those obtained from the aircrews' observations. If it is assumed that probabilities obtained from the samples of aircrew observations are better estimates of the true probabilities than estimates inferred from frequency distributions of sky cover categories, the CFLOS probabilities obtained from the CFLOS model are biased. The CFLOS model will yield CFLOS probabilities for any hour of the day, season of the year, and altitude at any geographical location where routine observations of sky cover, altitude and amount are taken. When the model probabilities are increased to correct for bias, they provide good estimates of true probabilities of a CFLOS. (Author).
Author: U.S. Air Force Geophysics Laboratory
Publisher:
ISBN:
Category : Geophysics
Languages : en
Pages : 1066
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Book Description
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1104
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Book Description
Author:
Publisher:
ISBN:
Category : Geophysics
Languages : en
Pages : 198
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Book Description
Author: Air Force Cambridge Research Laboratories (U.S.)
Publisher:
ISBN:
Category : Geophysics
Languages : en
Pages : 228
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Book Description
Author:
Publisher:
ISBN:
Category : Meteorology
Languages : en
Pages : 68
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Book Description
Author: Thad Godish
Publisher: CRC Press
ISBN: 156670586X
Category : Nature
Languages : en
Pages : 519
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Book Description
Ozone-destroying chemicals, greenhouse gases, and dangerous airborne substances that were once thought to be benign are the most urgent issues facing air pollution control experts. Students need a thorough, updated reference that explores these current trends while also covering the fundamental concepts of this emerging discipline. A new revision of a bestseller, Air Quality, Fourth Edition provides a comprehensive overview air quality issues, including a better understanding of atmospheric chemistry, the effects of pollution on public health and the environment, and the technology and regulatory practices used to achieve air quality goals. New sections cover toxicological principles and risk assessment. The book also contains revised discussions on public policy concerns, with a focus on air quality standards for ozone depletion and global warming, and the health effects of particulate air pollutants. This edition continues to serve as a very readable text for advanced level undergraduate and early graduate study in environmental science, environmental management, and in programs related to the study of public health, industrial hygiene, and pollution control.
