UVAlw_UV {photobiologyPlants}

Calculate UVAlw:UV photon ratio from spectral irradiance.

Description

This function returns the UVA:UV photon ratio of a light source spectrum.

Usage

UVAlw_UV(spct, std = "plants", use.cached.mult = FALSE, use.hinges = TRUE)

Arguments

spct

an object of class "source.spct".

std

select which definition of UVAlw should be used, defaults to "plants". For UV "ISO" is always used.

use.cached.mult

logical indicating whether multiplier values should be cached between calls.

use.hinges

logical indicating whether to use hinges to reduce interpolation errors.

Value

a single numeric dimensionless value giving the UVA:UV photon ratio, with name attribute set to the name of the wavebands, with "(q:q)" appended.

Note

Whenever possible use UVA1 instead of UVAlw and UVA2 instead of UVAsw as UVA1 and UVA2 are frequently used definitions, even if not standardised, while UVAlw and UVAsw are ad-hoc definitions used in some publications for specific optical filters.

See Also

UVA, UV and q_ratio.

Examples

UVA_UV(sun.spct)