System and method for disambiguating shooter locations
First Claim
Patent Images
1. A method for disambiguating from shockwave-only signals a trajectory of a projectile producing a shockwave wavefront, comprising:
- measuring at least an initial portion of the shockwave-only signals with a plurality of spaced acoustic sensors forming an antenna;
determining from the measured portion of the shockwave-only signals Time-Difference-Of-Arrival (TDOA) values for sensor pairs with an accuracy sufficient to determine a gradient of curvature of the shockwave wavefront across the antenna;
determining the gradient of curvature of the shockwave wavefront; and
determining from the determined gradient of curvature the disambiguated projectile trajectory.
6 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods for determining and disambiguating the location of the shooter of supersonic projectiles based on shockwave-only signals are described. Using several spaced sensors, an initial portion of the shockwave-only signals is sensed to determine Time-Differences-Of-Arrival (TDOA) for the sensor pairs. The resulting TDOAs are used to determine the gradient of curvature of the shockwave wavefront on the sensors. The gradient of curvature is then used to determine the disambiguated projectile trajectory.
-
Citations
20 Claims
-
1. A method for disambiguating from shockwave-only signals a trajectory of a projectile producing a shockwave wavefront, comprising:
-
measuring at least an initial portion of the shockwave-only signals with a plurality of spaced acoustic sensors forming an antenna; determining from the measured portion of the shockwave-only signals Time-Difference-Of-Arrival (TDOA) values for sensor pairs with an accuracy sufficient to determine a gradient of curvature of the shockwave wavefront across the antenna; determining the gradient of curvature of the shockwave wavefront; and determining from the determined gradient of curvature the disambiguated projectile trajectory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for disambiguating a trajectory of a supersonic projectile from shockwave-only signals with an antenna having a plurality of acoustic sensors, comprising:
-
detecting shockwave-only signals at the plurality of acoustic sensors; determining from a correlation between the shockwave-only signals detected at the plurality of sensors Time-Difference-Of-Arrival (TDOA) values for sensor pairs; for an expected closest distance between a projectile trajectory and the antenna, determining if a precision of the Time-Difference-Of-Arrival (TDOA) values is adequate for determining a gradient of curvature of a shockwave wavefront across the antenna; determining the gradient of curvature of the shockwave wavefront; and determining the disambiguated projectile trajectory from the gradient of curvature. - View Dependent Claims (12, 13, 14, 15, 16)
-
-
17. A system for disambiguating a trajectory of a supersonic projectile from shockwave-only signals, comprising:
-
an antenna having a plurality of acoustic sensors; and a processor configured to receive signals at the acoustic sensors and determine if the received signals are shockwave-only signals; perform a correlation between the shockwave-only signals; determine from the correlation Time-Difference-Of-Arrival (TDOA) values for sensor pairs; determine for an expected closest distance between a projectile trajectory and the antenna, if a precision of the Time-Difference-Of-Arrival (TDOA) values is adequate for determining a gradient of curvature of a shockwave wavefront across the antenna; determine the gradient of curvature of the shockwave wavefront; and determine the disambiguated projectile trajectory from the gradient of curvature. - View Dependent Claims (18, 19, 20)
-
Specification