Accession Number : ADD015128

Title :   Missile Orientation Monitor.

Descriptive Note : Patent,Filed 1 Jul 82, patented 13 Aug 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Taylor, Leonard S ; Kessler, Bernard V

Report Date : 13 Aug 1991

Pagination or Media Count : 7

Abstract : A monitor determines, from the ground, the orientation (roll and attitude) of a missile by observation of the character of a transmitted signal(s) therefrom. By transmitting to a ground receiver a linearly polarized signal(s), 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 signal(s) 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 signal(s) is obtained using a linearly polarized antenna array with electronic phase switching between the aforementioned equal power lobes.

Descriptors :   ANTENNA ARRAYS, CROSS POLARIZATION, ELECTRONIC SWITCHING, FRAMES, GROUND LEVEL, GUIDED MISSILES, MONITORS, ORIENTATION(DIRECTION), PHASE(ELECTRONICS), POLARIZATION, RECEIVERS, SIGNALS, SWITCHING, TRANSMITTERS

Subject Categories : Active & Passive Radar Detection & Equipment
      Spacecraft Trajectories and Reentry

Distribution Statement : APPROVED FOR PUBLIC RELEASE