Calculate radar beam range

Calculates the range (i.e. slant range) given a distance measured along the earth's surface (i.e. down range) and beam elevation.

Usage

beam_range(distance, elev, k = 4/3, lat = 35, re = 6378, rp = 6357)

Arguments

distance

Numeric. Distance from the radar as measured along sea level (down range), in m.

elev

Numeric. Beam elevation, in degrees.

k

Numeric. Standard refraction coefficient.

lat

Numeric. Geodetic latitude of the radar, in degrees.

re

Numeric. Earth equatorial radius, in km.

rp

Numeric. Earth polar radius, in km.

Value

Beam range (slant range), in m.

Details

depends on beam_height to calculate beam height.

See also

Other beam_functions: beam_distance(), beam_height(), beam_profile(), beam_profile_overlap(), beam_width(), gaussian_beam_profile()

Examples

# Slant range of the 5 degree elevation beam at a down range of 100 km
beam_range(100000, 5)
#> [1] 100508.1