GPS independent guidance sensor system for gun-launched projectiles
First Claim
1. A sensor system for measuring parameters used for guiding a gun-launched projectile, comprising:
- a plurality of RF antennas mounted to the projectile, each RF antenna being arranged to receive an RF signal of a selected polarization; and
a radar RF emitter/receiver system arranged to direct polarized RF signals toward the plurality of RF antennas mounted to the projectile, the radar RF emitter/receiver being further arranged to receive polarized RF signals backscattered from the plurality of RF antennas mounted to the projectile and process the received polarized backscattered RF signals to determine position and velocity vectors of the projectile.
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Accused Products
Abstract
A sensor system uses ground emitters to illuminate a projectile in flight with a polarized RF beam. By monitoring the polarization modulation of RF signals received from antenna elements mounted on the projectile, both angular orientation and angular rate signals can be derived and used in the inertial solution in place of the gyroscope. Depending on the spacing and positional accuracies of the RF ground emitters, position information of the projectile may also be derived, which eliminates the need for accelerometers. When RF signals of ground emitter/s are blocked from the guided projectile, the sensor deploys another plurality of RF antennas mounted on the projectile nose to determine position and velocity vectors and orientation of incoming targets.
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Citations
14 Claims
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1. A sensor system for measuring parameters used for guiding a gun-launched projectile, comprising:
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a plurality of RF antennas mounted to the projectile, each RF antenna being arranged to receive an RF signal of a selected polarization; and a radar RF emitter/receiver system arranged to direct polarized RF signals toward the plurality of RF antennas mounted to the projectile, the radar RF emitter/receiver being further arranged to receive polarized RF signals backscattered from the plurality of RF antennas mounted to the projectile and process the received polarized backscattered RF signals to determine position and velocity vectors of the projectile. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for measuring parameters used for guiding a gun-launched projectile, comprising the steps of:
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mounting a plurality of RF antennas to the fins of the projectile; arranging each RF antenna to receive an RF signal of a selected polarization; and arranging a radar RF emitter/receiver system to direct polarized RF signals toward the plurality of RF antennas; and arranging the radar RF emitter/receiver to receive polarized RF signals received by the plurality of RF antennas mounted on the projectile and process the received polarized RF signals to determine position and velocity vectors for the gun-launched projectile. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification