UVAlw_UV: Calculate UVAlw:UV photon ratio from spectral irradiance.

In photobiologyPlants: Plant Photobiology Related Functions and Data

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 nondimensional 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 defintions, even if not standarddised, while UVAlw and UVAsw are ad-hoc definitions used for specific optical filters.

See Also

link[photobiologyWavebands]{UVA}, link[photobiologyWavebands]{UV}.

Examples

UVA_UV(sun.spct)

photobiologyPlants documentation built on May 31, 2023, 6:08 p.m.