Definitions of classes, methods, operators and functions for use
in photobiology and radiation meteorology and climatology. Calculation of
effective (weighted) and not-weighted irradiances/doses, fluence rates,
transmittance, reflectance, absorptance, absorbance and diverse ratios and
other derived quantities from spectral data. Local maxima and minima: peaks,
valleys and spikes. Conversion between energy-and photon-based units.
Wavelength interpolation. Astronomical calculations related solar angles and
day length. Colours and vision. This package is part of the 'r4photobiology'
suite, Aphalo, P. J. (2015) <doi:10.19232/uv4pb.2015.1.14>.

Photobiological Calculations

package-ubuntu-20.04-r-4.0.5#cran#photobiology-0.10.10

<p>twilight argument check and conversion
</p>

<p>numeric Solar elevation angle at sunrise or sunset
</p>

package-ubuntu-20.04-r-4.0.5#cran#photobiology-0.10.10#docs#twilight2angle

twilight2angle

Description

Usage

Value

photobiology

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