"A and 3B is a detailed block diagram of a digital receiving system incorporating the present invention.FIGS. 4A, 4B and 4C illustrate the method of fitting an ideal pattern to a truncated received pattern.FIGS. 5A and 5B illustrate a distorted pattern produced by surface reflections.FIG. 6 illustrates the signal format employed by pulsed elevation guidance systems.FIG. 7 illustrates the signal for" . . . .