Accession Number : ADA311175

Title :   Error Analysis for Bullet Tracker Concept.

Descriptive Note : Final rept. Jan-Jun 95,

Corporate Author : INSTITUTE FOR DEFENSE ANALYSES ALEXANDRIA VA

Personal Author(s) : Nicoll, Jeffrey ; Sparrow, David

PDF Url : ADA311175

Report Date : AUG 1995

Pagination or Media Count : 45

Abstract : It has been proposed that a single staring infrared focal plane array sensor be used to measure the track of a sniper bullet and used to deduce the location of the shooter. This involves deducing the three dimensional track from the two dimensional information provided on the focal plane. This would be impossible in the absence of gravity or other forces since an infinite number of straight line, constant velocity three dimensional trajectories correspond to the same two dimensional track: a slowly moving object at short range leaves the same track as a more distant object moving more rapidly in a parallel direction. However, in the presence of gravity, the trajectory is curved and this curvature can be used, in principle, to distinguish the tracks. The proposed system has been partly demonstrated in simulation but no complete error analysis was done. This paper provides that error analysis and therefore gives bounds on the sensor performance required to reach any specified degree of performance.

Descriptors :   *PROJECTILE TRAJECTORIES, *INFRARED TRACKING, SMALL ARMS AMMUNITION, SNIPERS, ERROR ANALYSIS, GRAVITY, PERTURBATIONS, PARALLEL ORIENTATION, FOCAL PLANES, TRAJECTORIES.

Subject Categories : Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE