oblique visual range

From Glossary of Meteorology
(Redirected from Oblique visibility)
(Also called oblique visibility, slant visibility.) The greatest distance at which a specified target can be perceived when viewed along a line of sight inclined to the horizontal.

One must distinguish upward from downward oblique visual range because of the quite different background luminance prevailing in the two cases. Furthermore, a range can only be considered with respect to some given type of target, as is also true of the ordinary (horizontal) visual range. In view of the great importance of the downward oblique visual range in air to ground visual contact and the upward oblique visual range in visual detection of aircraft, it is unfortunate that no satisfactory theory for this has yet been developed. The principal obstacle in treating this problem lies in the typically nonuniform height variation of the extinction coefficient.


Copyright 2024 American Meteorological Society (AMS). For permission to reuse any portion of this work, please contact [email protected]. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act (17 U.S. Code § 107) or that satisfies the conditions specified in Section 108 of the U.S.Copyright Act (17 USC § 108) does not require AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a website or in a searchable database, or other uses of this material, except as exempted by the above statement, require written permission or a license from AMS. Additional details are provided in the AMS Copyright Policy statement.