Nephoscope

Nephoscope is instrument for measuring the altitude, direction, and velocity of clouds. It Uses Radio Waves that bounce back and forth.

http://img.tfd.com/wn/27/63027-nephoscope.gif

There are several types of nephoscope: the comb nephoscope developed by Besson;
the mirror nephoscope developed by Finemann;
the grid nephoscope, a variation on the comb modified by the Norwegians.

The nephoscope is used as a grid to measure the clouds.It is also used to find the movements of clouds.

Translation of "Nephoscope"

Russian: Нефоскоп.