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Comments on Air to Air Visibility at High Altitude

Comments on Air to Air Visibility at High Altitude by PDF

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Page : 14 pages
File Size : 18,24 MB
Release : 1954
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Aviators flying at high altitude report difficulty in sighting other aircraft. The factors causing this poor air-to air visibility are discussed, particularly the phenomenon of 'empty field' myopia. It is concluded that the correction of the myopia may moderately improve air-to-air vision. An experiment for quantitatively determining the improvement is proposed, and some practical methods of correcting the empty field myopia are suggested.

Estimates of Visibility from High Altitude Aircraft

John D. Coakley
Estimates of Visibility from High Altitude Aircraft by John D. Coakley PDF

Author : John D. Coakley
Publisher :
Page : 60 pages
File Size : 24,46 MB
Release : 1948
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The distance at which an object becomes visible depends upon such factors as brightness contrast, target size, brightness level, and atmospheric attenuation. Numerical values are selected to represent the influence of these variables under the conditions of high altitude flight. Visibility is examined under the following conditions: (a) Altitude of observer--sea level, 50,000, 100,000, and 200,000 feet. (b) Altitude of target--from sea level to approximately 300,000 feet (60 miles). (c) Background brightness conditions--from 1 to 32 footlamberts. (d) Contrast ratio between target and background--for values of 1, 5, 10, and 100. The computation of visibility is based on visual acuity data corrected for the effect of atmospheric attenuation at various altitudes. A round object with a diameter of 10 feet may be used as a representative target. (Author).

Research Review

Research Review by PDF

Author :
Publisher :
Page : 28 pages
File Size : 17,63 MB
Release : 1969-05
Category : Research
ISBN :

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Research Review

United States. Air Force. Office of Aerospace Research
Research Review by United States. Air Force. Office of Aerospace Research PDF

Author : United States. Air Force. Office of Aerospace Research
Publisher :
Page : 336 pages
File Size : 19,5 MB
Release : 1967
Category : Aeronautics
ISBN :

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Instrument Pilot Examination Guide

United States. Civil Aeronautics Administration
Instrument Pilot Examination Guide by United States. Civil Aeronautics Administration PDF

Author : United States. Civil Aeronautics Administration
Publisher :
Page : 52 pages
File Size : 30,37 MB
Release : 1957
Category : Instrument flying
ISBN :

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