bioRad (version 0.5.1)

beam_distance: Calculate radar beam distance

Description

Calculates the distance as measured over the earth's surface (the down range) for a given beam elevation and slant range.

Usage

beam_distance(range, elev, k = 4/3, lat = 35, re = 6378, rp = 6357)

Arguments

range

numeric. Slant range in m, the length of the skywave path between target and the radar antenna.

elev

numeric. Beam elevation in degrees.

k

Standard refraction coefficient.

lat

Geodetic latitude of the radar in degrees.

re

Earth equatorial radius in km.

rp

Earth polar radius in km.

Value

numeric. Beam distance (down range) in m.

Details

depends on beam_height to calculate beam height.

Examples

# NOT RUN {
# down range of the 5 degree elevation beam at a slant range of 100 km:
beam_distance(100000, 5)
# }