Definitions for "Heliostat"
Keywords:  mirror, sunlight, solar, sun, byers
An instrument consisting of a mirror moved by clockwork, by which a sunbeam is made apparently stationary, by being steadily directed to one spot during the whole of its diurnal period; also, a geodetic heliotrope.
A clock-driven instrument mounting which automatically and continuously points in the direction of the sun. It is used with a pyrheliometer when continuous direct solar radiation measurements are required.
a mechanical device which turns to point continuously at the sun