mag.dec {skyscapeR}

Estimates magnetic declination (difference between true and magnetic north) based on IGRF 12th gen model

Description

This function estimates the magnetic declination at a given location and moment in time, using the 12th generation International Geomagnetic Reference Field (IGRF) model. This function is a wrapper for function magneticField of package oce.

Usage

mag.dec(loc, date)

Arguments

loc

Location, can be either a skyscapeR.horizon object or, alternatively, a latitude.

date

Date for which to calculate magnetic declination in the format: 'YYYY/MM/DD'

See Also

magneticField

Examples

# Magnetic Declination for London on April 1st 2016:
loc <- c( 51.5074, -0.1278 )
mag.dec( loc, "2016/04/01" )