Raytheon Command and Control Solutions LLC

Thales-raytheon Systems Company LLC

James W Rakeman

Richard S Herbel

Thomas W Miller

David E Stephens

A system for providing remote target identification is provided that includes a radar system and an electro-optical detector. The radar system is configured to locate a remote target. The electro-optical detector is configured to detect an optical signal transmitted from the target when the target is located. The optical signal includes identifying data for the target.

System and method for providing remote target identification using radiofrequency identification

Pressure variations within a solid propellant rocket motor produce like variations in the optical radiance of the motor exhaust plume. The periodicity of the variation is related to the length L of the rocket motor or speed of sound in the rocket motor combustion chamber to length ratio a/L. The optical radiance is collected and converted to electrical signals that are sampled at or above the Nyquist rate. An array of single-pixel photo detectors is well suited to provide amplitude data at high sample rates. The sampled data from the one or more detectors is assembled to form a high fidelity time sequence. A window of sampled data is processed to form a signal frequency spectrum. The mode structure in the frequency spectrum is related to the rocket motor length or speed of sound in the rocket motor chamber to length ratio. The rocket motor length or speed of sound to length ratio is used alone or in combination with other information to either classify or identify the rocket motor.

Classification and identification of solid propellant rocket motors

A synchronization time delay due to a time synchronization protocol between a first sensing system (e.g., a radar system) and a second sensing system (e.g., an optical sensing system) is evaluated. A timing validation system generates a signal and calculates the total time delay between generation of the test signal and receipt of a detection notification communication transmitted from the second sensing system to the timing validation system, via the first sensing system. for the second sensing system to communicate its detection to the timing validation system, via the first sensing system. The synchronization time delay is extracted from the total time delay by removing contributions to the total time delay from additional sources. The calculated synchronization time delay is compared to a threshold delay and, based upon the comparison, generates a result validating or invalidating the time synchronization protocol.

Timing validation for data fusion

Methods and apparatus for locating a weapon by fusing audio and radar data. An exemplary embodiment comprises detecting a weapon firing event with an audio sensor system, detecting a projectile fired from the weapon with a radar system, calculating a state vector associated with the projectile detection, identifying a location of the weapon by backtracking the state vector to the detected time of the weapon firing event time, and communicating the location of the weapon.

Methods and apparatus for detection system having fusion of radar and audio data

A method of locating a weapon includes detecting a weapon firing event with an optical sensor, the detected weapon firing event indicative of a detected firing of the weapon and indicative of a detected time of the weapon firing event. The method also includes detecting a projectile fired from the weapon with a radar system. The method also includes calculating a state vector associated with the projectile detection. The method also includes identifying a location of the weapon by backtracking the state vector to the detected time of the weapon firing event time. The method also includes communicating the location of the weapon. A system that implements the method is also described.

Growing community of inventors

Brea, CA, United States of America

James W Rakeman