Search radar system
First Claim
1. A search radar system including at least first and second radar devices coupled to respective first and second radar antennas, target data processing means for processing target data produced by said radar devices, and radar display means, characterized in that:
- a. the antennas are arranged for rotation together but with mutually different orientations in azimuth;
b. each of the antennas is arranged to perform a two-dimensional scan with the same elevation angle,c. the radar devices individually produce target data representative of successive detections by the respective antennas of indentical targets;
d. the target data processing means is adapted to correlate the target data for identical targets which is produced by the radar devices and comprises means for predicting from the target data of the first radar device the position of each target for a subsequent revolution of the first antenna as well as the position of each target at the moment when the at least one second antenna will detect said target, and to predict, from the target data of the at least one second radar device, the position of each target for subsequent revolutions of the at least one second antenna, said predictions being correlated with said detections to establish which target data obtained from the different radar devices originate from identical targets, ande. the radar display means receives and displays the target data from the first and second radar devices so as to effectively double the rate at which target data is displayed for a given antenna rotation speed.
1 Assignment
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Accused Products
Abstract
A search radar system, is provided which includes at least one search radar device (1) having a primary antenna (2) and at least one secondary radar device (3) having an SSR/IFF antenna (4). The radar devices (1, 3) independently supply plot data from which signals are derived that are each suitable for presentation on a radar display. The antennas (2, 4) are oriented in opposite directions so that the said signals are derived from individual plot data representing successive detections by the respective antennas of the same target which can be individually presented. Hence, the data rate of the radar system is doubled relative to a conventional radar system having a conventional secondary radar device and a conventional antenna system.
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Citations
8 Claims
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1. A search radar system including at least first and second radar devices coupled to respective first and second radar antennas, target data processing means for processing target data produced by said radar devices, and radar display means, characterized in that:
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a. the antennas are arranged for rotation together but with mutually different orientations in azimuth; b. each of the antennas is arranged to perform a two-dimensional scan with the same elevation angle, c. the radar devices individually produce target data representative of successive detections by the respective antennas of indentical targets; d. the target data processing means is adapted to correlate the target data for identical targets which is produced by the radar devices and comprises means for predicting from the target data of the first radar device the position of each target for a subsequent revolution of the first antenna as well as the position of each target at the moment when the at least one second antenna will detect said target, and to predict, from the target data of the at least one second radar device, the position of each target for subsequent revolutions of the at least one second antenna, said predictions being correlated with said detections to establish which target data obtained from the different radar devices originate from identical targets, and e. the radar display means receives and displays the target data from the first and second radar devices so as to effectively double the rate at which target data is displayed for a given antenna rotation speed. - View Dependent Claims (2, 3, 4, 5)
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6. A search radar system comprising;
- at least a primary and a secondary radar device coupled to a respective primary and a secondary radar antenna, target data processing means coupled to said radar devices for processing target data produced by said radar devices, and radar display means responsive to the target data processing means, characterized in that;
a. the antennas are arranged for rotation together but with mutually opposite orientations in azimuth; b. the antennas are arranged so that each performs a conventional two-dimensional scan with substantially the same elevation angle; c. the radar devices individually produce data representative of successive detection by the respective antennas of identical targets; d. the target data processing means is adapted to correct the target data produced by the radar devices for the different orientations in azimuth of the respective antennas coupled to said radar devices; and e. the radar display means individually display the individually produced corrected data so as to effectively double the display update rate. - View Dependent Claims (7, 8)
- at least a primary and a secondary radar device coupled to a respective primary and a secondary radar antenna, target data processing means coupled to said radar devices for processing target data produced by said radar devices, and radar display means responsive to the target data processing means, characterized in that;
Specification