An acoustic sensing countermeasure device is used to sense the direction of a threat projectile or vehicle in addition to countering the threat with noise or interference signals. Countermeasure device includes an acoustic receive array comprised of segmented vertical slaves preferably mounted within a reduced diameter section around the outside housing of the countermeasure device. The staves are grouped to form directional acoustic beams across the entire horizontal plane. To ...
A sonar array uses multiple acoustically transparent layers. One layer is a planar array of acoustic sensors that is substantially acoustically transparent. Another layer is an acoustically transparent wiring assembly that provides electrical connection to each acoustic sensor. A third acoustically transparent layer is a planar array of signal processing circuits coupled to the wiring assembly for processing electrical signals generated by the acoustic sensors. Each signal processing circuit resides ...
A sonar sensor array having a multi-layer tiling arrangement for the individual elements that increases surface area available for each element while maintaining the inter-element spacing required to avoid spatial aliasing when the received signals are combined to form a sonar beam. The array comprises outer and inner arrays of transducer elements for converting an acoustic signal to an electrical response. The transducer elements of the outer array are positioned ...
This report describes work performed under contract, to provide the Image Feature Extraction System (IFES) for the Digital Interactive Complex for Image Feature Extraction and Recognition (DICIFER) System at Rome Air Development Center (RADC). The DICIFER System is being used for experimental analysis of single and multispectral reconnaissance imagery of national interest and supports the basic development programs in intelligence and reconnaissance at RADC. IFES is a collection of image ...
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