Angle‐of‐arrival measurements have been performed on a troposcatter path by simultaneous reception in angle diversity using antenna beams of 19.2‐min beamwidth. The transmitting beamwidth is also 19.2 min, permitting measurement of the beam broadening due to the variable refractive index along the propagation path. The results of these measurements have indicated that the antenna beam may sometimes undergo an rms horizontal deflection as great as 17 min of arc over the half‐path length of 148 km.
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