Patent ID: 6483455
Filing Date: 2002-11-19
Classification: F41G,G01S

Abstract:
A device for measurement of angle of roll of a projectile, comprising:a radar equipped with means of processing and sending a signal to a casing of the projectile in at least one direction of incident polarization; and a set of parallel grooves made on the casing having depths modulated dissymmetrically with respect to an axis of symmetry of the projectile; the axis of symmetry of the projectile not passing through a point of an antenna of the radar where the antenna beam is generated; and wherein the processing means is configured for analyzing, in reception, a signal back-scattered by the casing of the projectile, the signal being modulated as a function of the angle of roll of the projectile, the modulation having two maximum local values corresponding to two angular roll positions of the projectile such that the polarization is parallel to the grooves, the processing means removing a 180Â° ambiguity by comparing levels of the local maximum values.