twilight2angle

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

internal

Compute the position of the sun, and local solar time using Meeus'
formulae. Compute day and/or night length using different
twilight definitions or arbitrary sun elevation angles. This package is
part of the 'r4photobiology' suite, Aphalo, P. J. (2015)
<doi:10.19232/uv4pb.2015.1.14>. Algorithms from Meeus (1998, ISBN:0943396611).

Pedro Aphalo

SunCalcMeeus

twilight2angle: twilight argument check and conversion

Description

Usage

Arguments

Value