Physical Sciences Inc. (PSI), in conjunction with its subcontractor, VTech Engineering Corp., developed an ultra low noise receiver module (RM) for direct detection LWIR LIDAR systems. The receiver module is compatible with emerging LWIR source technologies, e.g., optical parametric amplifier-based sources, as well as existing frequency-agile CO2 laser technology. In this paper we present RM performance attributes based on characterization experiments performed in the laboratory, as well as part of ...
Objective: Improve standoff range and chem-bio agent detection limits of direct detection LWIR differential absorption LIDAR systems * Standoff range: 2x increase for fixed chem-bio sensitivity; scales as 1/sqrt(NEP) * CB agent sensitivity: 4x increase for fixed standoff range, scales as NEP * Compatible with 200 Hz line-tuned CO2 laser.
A sensor constellation capable of determining the location and detailed concentration distribution of chemical warfare agent simulant clouds has been developed and demonstrated on government test ranges. The constellation is based on the use of standoff passive multispectral infrared imaging sensors to make column density measurements through the chemical cloud from two or more locations around its periphery. A Computed Tomography (CT) inversion method is employed to produce a three ...
The Range Test Validation System (RTVS) includes a constellation of five AIRIS-WAD standoff multispectral sensors oriented around a 1000x1000 meter truth box at a range of 2700 meters. Column density data derived from these sensors is transmitted in real-time to a command post using a wireless network. The data is used with computed tomographic methods to produce 3-D cloud concentration profiles for chemical clouds traversing the box. These concentration profiles ...
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