solar: Solar Time and Declination

In GeoLight: Analysis of Light Based Geolocator Data

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 calculted 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())

Example output

Loading required package: maps
$solarTime
[1] 224.1853

$eqnTime
[1] 7.816461

$sinSolarDec
[1] -0.007169341

$cosSolarDec
[1] 0.9999743

GeoLight documentation built on May 1, 2019, 8 p.m.