Calculates the range (i.e. slant range) given a distance measured along the earth's surface (i.e. down range) and beam elevation.
beam_range(distance, elev, k = 4/3, lat = 35, re = 6378, rp = 6357)Numeric. Distance from the radar as measured along sea level (down range), in m.
Numeric. Beam elevation, in degrees.
Numeric. Standard refraction coefficient.
Numeric. Geodetic latitude of the radar, in degrees.
Numeric. Earth equatorial radius, in km.
Numeric. Earth polar radius, in km.
Beam range (slant range), in m.
depends on beam_height to calculate beam height.
Other beam_functions:
beam_distance(),
beam_height(),
beam_profile(),
beam_profile_overlap(),
beam_width(),
gaussian_beam_profile()
# Slant range of the 5 degree elevation beam at a down range of 100 km
beam_range(100000, 5)
#> [1] 100508.1