Ground threat location for an aircraft
AssigneeLockheed Martin Corporation
InventorsJoseph F. Cecala, Carl R. Herman, Stephen C. Moraites
Life of this patent
Estimating the term…
Abstract
Systems and methods are provided for locating threats to an aircraft that are located on the ground. Associated bearings are determined from an aircraft for each of a plurality of detected shots from a threat at ground level. A plurality of pairs of bearings are selected, and a weight value is calculated for each selected pair of bearings. An estimated position for the threat is determined from each selected pair of bearings. An improved estimation of the position for the threat is calculated as a weighted combination of the estimated positions.
Claims20
A method for locating threats to an aircraft that are located on the ground, comprising:
- determining associated bearings from an aircraft for each of a plurality of detected shots from a threat at ground level;
- selecting a plurality of pairs of bearings;
- calculating a weight value for each selected pair of bearings;
- determining an estimated position for the threat from each selected pair of bearings;
- and
- calculating an improved estimation of the position for the threat as a weighted combination of the estimated positions.
A system for locating threats to an aircraft that are located on the ground, comprising:
- a bearing determination element configured to determine associated bearings from an aircraft for each of a plurality of detected shots from a threat at ground level;
- a position estimation element configured to determine an estimated position for the threat from each of a plurality of pairs of bearings;
- and
- a position aggregation element configured to calculate an improved estimated position for the threat from the estimated positions.
A computer readable medium storing executable instructions that can be executed by a processor to locate threats to an aircraft that are located on the ground from sensor data, the executable instructions comprising:
- a position estimation element configured to determine a plurality of estimated positions for a threat at ground level from the sensor data;
- a weight determination element configured to calculate an associated weight for each of the estimated positions;
- and
- an averaging element configured to calculate a weighted average of the estimated positions to provide an improved estimated position for the threat.
Dependencies are inferred from the claim text.