FIELD: control of air transport motion.
SUBSTANCE: in each design of the group for measurement of the altitude relative to the ground radio waves are received radiated downwards by a lying-by aeroplane. Then, the data on fluctuations of the level of the electric field strength of such radio waves are introduced and recorded in the computer. The time of passage-by of the nearest point is determined on the basis of the time of onset of clearly defined peaks irrespective of the frequency of motion.
EFFECT: enhanced accuracy.
8 cl, 12 dwg, 12 tbl
