Device for the unambiguous measurement of the roll angle of a projectile and use thereof for correcting the trajectory of a projectile

摘要

The device modulates signal back-scattered by projectile casing as a function of roll angle of projectile (1). The modulation includes a pair of local values corresponding to two angular roll positions of the projectile such that the polarization is parallel to a pair of parallel grooves provided in casing of projectile. The 180 degrees ambiguity is removed by comparing levels of local maximum value. A radar has processor to process and send a signal to the casing of projectile in a direction of incident polarization (E). A set of parallel grooves are made on the casing, with depth modulated dissymmetrically with respect to axis of symmetry of projectile such that depth of the grooves increases from one peripheral groove to another peripheral groove. An Independent claim is also included for projectile path correction.