zenith: Declination of the zenith sun for a given location

In skyscapeR: Data Analysis and Visualization for Skyscape Archaeology

Description

This function returns the declination of the sun when it is at the zenith for a given location with corrected average parallax. If this phenomena does not occur at given location (i.e. if location is outside the tropical band) the function returns a NULL value.

Usage

zenith(loc, parallax = 0.00224, altitude = 0)

Arguments

loc	This can be either the latitude of the location, or a skyscapeR.horizon object.
parallax	(Optional) Average parallax value for the sun. Defaults to 0.00224.
altitude	(Optional) Altitude of the sun. Defaults to 0 degrees.

See Also

jS, dS, eq, antizenith, spatial.equinox, parallax.corr

Examples

# Zenith sun declination for Mexico City:
zenith(19.419)

# There is no zenith sun phenomenon in London:
zenith(51.507)

skyscapeR documentation built on Oct. 30, 2021, 1:06 a.m.