Raytheon Company

Arthur L Bauer, Jr

William M Pease

Peter Redes

A radar system that enhances the display of moving targets by using negative scan-to-scan correlation to determine which pixels will be displayed at the brightest level. More specifically, a bit image stores a multi-bit scan-to-scan correlated history for each pixel on a display screen, and when new video data is received on a scan, the bit image memory is modified in accordance therewith. A pixel is enhanced to the brightest level only if a return is received from a spacial location from which returns were not received on previous scans. Thus, a target that moves to a new location is displayed at the brightest level because it doesn't correlate with returns from prior scans.

Radar apparatus and method for enhancing the display of moving targets

A radar system having a raster scan memory storing scan-to-scan integrated true motion stabilized data. A scan converter generates x,y addresses along azimuth sweeps from the x,y coordinates of own-ship relative to an arbitrary true reference origin. Accordingly, as own-ship moves, the initial x,y coordinates for the azimuth sweeps are continuously being updated. For each x,y coordinate generated, the scan converter also generates a range address for reading corresponding video data stored in polar coordinates relative to own-ship. The x,y coordinates are coupled to a PROM which rolls over the x,y coordinates that are outside of the x,y address field of the memory thereby enabling the addressing of the memory for storing data derived from corresponding polar coordinate video data. Data in the memory is used to raster scan a visual display. The memory is organized into a plurality of planes wherein the data for each pixel of the display is derived from a plurality of bits that are scan-to-scan integrated. The transfer of data to the visual display is controlled such that the raster scanning can be initiated from any row and from any column of stored data.

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Auburn, NH, United States of America

Arthur L Bauer, Jr