Accession Number : ADD010699
Title : Time Encoded Spatial Display.
Descriptive Note : Patent,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Morin,R J
Report Date : 10 May 1983
Pagination or Media Count : 76
Abstract : A time compressed radar display system for presenting to the operator radar return video which has been accumulated over a relatively long period of time in a very short time span, preferably at TV frame rates. A scan converter receives the radar position data in polar coordinate format and converts it to rectangular coordinate format. Each of the rectangular cells, resulting from the scan conversion, is provided with an address. The radar video is continuously converted from analog to digital. Memory and comparison logic are used for determining and storing the highest value of video data occurring in each of the data cells, during a predetermined number (n) of revolutions of the radar scanning antenna. Logic circuitry is also provided to determine and store the number of antenna revolutions over the most recent (n) scans of the antenna, in which the video level exceeded a predetermined threshold for each of the addressable cells.
Descriptors : *Patents, *Radar equipment, *Television display systems, *Video signals, *Radar receivers, *Memory devices, Electronic scanners, Radar scanning, Time compression, Converters, Data rate, Radar antennas, Spatial filtering, Circuit analysis, Logic circuits, Comparison, Coordinates, Logic, Mass storage, Antennas, Threshold effects, Addressing, Integrators, Schematic diagrams, Coding, Formats, Decay, Cells
Subject Categories : Electrical and Electronic Equipment
Active & Passive Radar Detection & Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE