UVAsw_UV: Calculate UVAsw:UV photon ratio from spectral irradiance.

In photobiologyPlants: Plant Photobiology Related Functions and Data

Calculate UVAsw:UV photon ratio from spectral irradiance.

Description

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

Usage

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

Arguments

spct	an object of class "source.spct".
std	select which definition of UVAsw 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

UVAsw_UV(sun.spct)

photobiologyPlants documentation built on April 3, 2025, 10:44 p.m.