An evolving combat arena poses an ever-growing hostile fire threat for various ground and airborne targets. Protecting both static posts and moving military platforms against these threats require high performance and affordable solutions, favoring uncooled sensing alert technologies. By analyzing accumulated target and clutter data using new algorithmic and hardware building blocks we establish improved hostile fire indication system configurations. The paper will review new system demonstrations harnessing uncooled IR sensors technology alongside empirical field testing results.
A passive IR approach for stationary system is introduced providing protection to high value infrastructure
and strategic areas by detecting and warnings against fire shot from rifles, carbines, sub-machines and various
other small arms - SWAD.
SWAD provides protected surroundings in which it remotely detects small arms fire. By analyzing their
patterns, including duration and intensity, SWAD classifies the type of weapon being used.
Following the demand for affordable, various range and light-weight protection against ATGM's, Elisra develops a cost-effective
passive IR system for ground vehicles. The system is based on wide FOV uncooled bolometric sensors with full
azimuth coverage and a lightweight processing & control unit.
The system design is based on the harsh environmental conditions. The basic algorithm discriminates the target from its
clutter and predicts the time to impact (TTI) and the target aiming direction with relation to vehicle. The current detector
format is 320*240 pixels and frame rate is 60 Hz, Spectral response is on Far Infrared (8-14&mgr;). The digital video output
has 14bit resolution & wide dynamic range. Future goal is to enhance detection performance by using large format
uncooled detector (640X480) with improved sensitivity and higher frame rates (up to 120HZ).
Novel methods for radiometric calibration of InSb FPA camera were developed and tested. An advanced weighting function method is used in order to transform a pixel gray level (14 bit digitized and corrected by the nonuniformity correction -- NUC electronics) into the integral radiance (over the camera spectral bandwidth) on the target plane. The study can be applied for various InSb FPA cameras with controlled integration times, high stability of their NUC-electronics and large dynamic range of its data acquisition board.
Novel methods for radiometric calibration of InSb FPA camera were developed and tested. An advanced weighting function method is used in order to transform a pixel gray level (14 bit digitized and corrected by the non uniformity correction - - NUC electronics) into the integral radiance (over the camera spectral bandwidth) on the target plane. The study can be applied for various InSb FPA cameras with controlled integration times, high stability of their NUC-electronics and large dynamic range of its data acquisition board.
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