solar: Solar Time and Declination

In SWotherspoon/SGAT: Solar/Satellite Geolocation for Animal Tracking

Solar Time and Declination

Description

Calculate solar time, the equation of time and solar declination

Usage

solar(tm)

Arguments

tm	a vector of POSIXct times.

Details

The solar time, the equation of time and the sine and cosine of the solar declination are calculated for the times specified by tm using the same methods as www.esrl.noaa.gov/gmd/grad/solcalc/.

Value

A list containing the following vectors.

solarTime	the solar time (degrees)
eqnTime	the equation of time (minutes of time)
sinSolarDec	sine of the solar declination
cosSolarDec	cosine of the solar declination

See Also

zenith

Examples

## Current solar time
solar(Sys.time())

SWotherspoon/SGAT documentation built on June 1, 2022, 10:49 p.m.