Missile Orientation Monitor.
Patent,Filed 1 Jul 82, patented 13 Aug 91,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A monitor determines, from the ground, the orientation roll and attitude of a missile by observation of the character of a transmitted signals therefrom. By transmitting to a ground receiver a linearly polarized signals, the missile identifies a given plane fixed with respect to its body frame. This plane is identified at the ground receiver by comparing the ratio of the signals received in any two cross-polarized directions. To resolve the attendant 180 deg ambiguity, the monitor employs an antenna array disposed on the missile that is switchable, back and forth, between two equal power lobes. The monitor operates with a single transmitter, and the simple lobe structure of the transmitted signals is obtained using a linearly polarized antenna array with electronic phase switching between the aforementioned equal power lobes.
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