solalt: Calculates the solar altitude

In ilyamaclean/microctools: Various worker functions for microclimc package

Calculates the solar altitude

Description

solalt is used to calculate the solar altitude at any given location from the local time.

Usage

solalt(localtime, lat, long, jd, merid = round(long/15, 0) * 15, dst = 0)

Arguments

localtime	local time (decimal hour, 24 hour clock).
lat	latitude of the location for which the solar altitude is required (decimal degrees, -ve south of the equator).
long	longitude of the location for which the solar altitude is required (decimal degrees, -ve west of Greenwich meridian).
jd	Julian day expressed as an integer as returned by jday().
merid	optional value representing the longitude (decimal degrees) of the local time zone meridian (0 for GMT). Default is round(long / 15, 0) * 15
dst	optional value representing the time difference from the timezone meridian (hours, e.g. +1 for BST if merid = 0).

Value

solar altitude (decimal º).

Examples

# solar altitude at noon on 21 June 2010, Porthleven, Cornwall
jd <- jday (2010, 6, 21) # Julian day
solalt(12, 50.08, -5.31, jd)

ilyamaclean/microctools documentation built on Jan. 25, 2023, 5:29 a.m.