Deciview definition

Deciview means a haze index derived from calculated light extinction, such that uniform changes in haziness correspond to uniform incremental changes in perception across the entire range of conditions, from pristine to highly impaired. The deciview haze index is calculated based on an equation found in 40 CFR 51.301, as amended on July 1, 1999.
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Deciview means a measurement of visibility impairment. A deciview is a haze index derived from calculated light extinction, such that uniform changes in haziness correspond to uniform incremental changes in perception across the entire range of conditions, from pristine to highly impaired. The deciview haze index is calculated based on the following equation (for the purposes of calculating deciview, the atmospheric light extinction coefficient must be calculated from aerosol measurements):
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Deciview means a metric for visibility impairment. A deciview is a haze index derived from calculated light extinction that is designed so that uniform changes in haziness correspond to uniform incremental changes in perception across the entire range of conditions, from pristine to highly impaired. The haze index in units of deciviews is calculated as follows:
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Examples of Deciview in a sentence

  • The deciview haze index is calculated based on the following equation (for the purposes of calculating deciview, the atmospheric light extinctioncoefficient must be calculated from aerosol measurements): Deciview Haze Index = 10 lne (bext /10Mm-1) where bext= the atmospheric light extinction coefficient, expressed in inverse megameters (Mm-1).

  • The deciview haze index is calculated based on the following equation (for the purposes of calculating deciview, the atmospheric light extinction coefficient must be calculated from aerosol measurements): Deciview Haze Index = 10 ln (b /10Mm-1) where bext = the atmospheric light extinction coefficient, expressed in inverse megameters (Mm-1).

  • The deciview haze index is calculated based on the following equation (for the purposes of calculating deciview, the atmospheric light extinction coefficient must be calculated from aerosol measurements): Deciview Haze Index = 10 lne (bext /10Mm-1) where bext = the atmospheric light extinction coefficient, expressed in inverse megameters (Mm-1).

  • Change in Deciview = 10ln[(βext)future / (βext)base]- or -Change in Deciview = Deciviewbase - Deciviewfuture Visibility will be estimated for key Class I area in the Midwest for the base year and various future year scenarios.

  • First, under both hypotheses investors exit the market at year-ends and quarter-ends which drives prices down and rates up.

  • Deciview correlates to a person’s perception of a visibility change, with a change of 1 deciview being barely perceptible.

  • Deciview values are calculated from either measured or estimated light extinction values in units of inverse megameters (Mm-1).

  • Deciview = 10ln(βext/ βrayleigh) The reasonable progress test to determine the relationship between current and future year visibility is expressed in deciview units.

  • Deciview is a more useful measure for tracking progress in improving visibility than light extinction because each deciview change is an equal incremental change in visibility perceived by the human eye.

  • Natural Conditions and Base Year Deciview (dv) Values on the 20% Clearest and 20% Most Impaired Days at each VISTAS Class I Area for the Base Model Period (2009-2013)2 Class I AreaSite ID Class I Area Name IMPROVESite ID 2 Tables 3-2 and 3-3, EPA, 2017b.


More Definitions of Deciview

Deciview means a haze index derived from calculated light extinction, such that uniform changes
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Deciview means a haze index derived from calculated light extinction, such that uniform changes in haziness correspond to uniform incremental changes in perception across the entire range
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Deciview means an atmospheric haze index that expresses changes in visibility conditions as defined in 40 C.F.R. 51.301 as in effect on July 1, 2005.
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