“…By the distribution halfwidth we mean the quantity A study of the three-dimensional structure of pulse radiation from lasers propagating in a turbulent atmosphere was carried out in the author's laboratory [770]. The measurements were carried ou with a ruby laser (wavelength 0.69 P) which operated in the \free generation mode (the duratioL of the individual pulses was on the order of magnitude of 0.5 msec, with power of several hundreds of watts, and beam divergence 6').…”