Nephoscope is an instrument for measuring the altitude, direction, and velocity of clouds. A ray of light of known velocity is emitted from Nephoscope, which will strike with the base of the clouds. ... The travel time of the receiving signal is used to get the height of the clouds.

What is the nephoscope used for?

INSTRUMENT USED TO MEASURE THE SPEED & DIRECTION OF CLOUDS, BY MEANS OF THE CLOUD IMAGE REFLECTED ON THE MIRROR SURFACE, THE MOVEMENT OF WHICH IS MEASURED AGAINST THE GRADUATED SCALE OF THE NEPHOSCOPE.

How do you make a nephoscope?

A nephoscope is simply a mirror that the user points facing North. To construct this cloud viewer, teams should cut a piece of paper that is the same size as the mirror, then they should cut a large hole in the middle of the paper.