beam_width: Calculate radar beam width
Description
Calculates the width of a radar beam as a function of range and beam angle.
Usage
beam_width(range, beam_angle = 1)
Arguments
range
numeric. Range (distance from the radar antenna) in km.
beam_angle
numeric. Beam opening angle in degrees, typically the
the angle between the half-power (-3 dB) points of the main lobe
Value
numeric. Beam width in m.