Добрый день. Есть кто-то, хорошо разбирающийся в радарах начала ВМВ?
Конкретно американский CXAM-1. Высотометров не было, высоту цели можно было определить только косвенными методами. Есть описание так называемого "метода увядающего графика"? (fade chart):

Null areas existed in the electro-magnetic lobes of the waves when projected to specific areas. Thus contacts would disappear at certain ranges, depending on the target's altitude, and reappear later. Careful calibration and tests determined that only those aircraft flying at the same height faded at the same distance. For an individual radar set, these fade areas, once plotted, remained constant. The method was none too accurate, but it was the best at hand. The radars in use at the time had what were known as "A" scopes. They did not offer a visual display of the situation. Instead, the information to be intelligible had to be manually entered on a 360- degree polar plot. The flight path of a particular contact first became recognizable on the grid as a series of dots which resolved themselves when connected into a course line. Such plotting took precious time.

Кто-то может объяснить что это за "нулевые области затухания"? Антенна конечно дипольная, но там ведь и длина волны 1,5 м. т.е. речь не о падении мощности отраженного сигнала при прохождении "между волнами". Так что это тогда?