Calculate UVA1:UV photon ratio from spectral irradiance.

This function returns the UVA1:UV photon ratio of a light source spectrum.

Usage

UVA1_UV(spct, std = "CIE", use.cached.mult = FALSE, use.hinges = TRUE)

Arguments

spct

an object of class "source.spct".

std

select which definition of UVA1 should be used, defaults to "CIE". 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.

See also

UV, UVA and q_ratio.

Examples

UVA1_UV(sun.spct)
#> UVA1:]UV[q:q] 
#>     0.7902203 
#> attr(,"radiation.unit")
#> [1] "q:q ratio"