JPH01260386A - Primary/secondary radar target detection system - Google Patents

Abstract

PURPOSE:To prevent the disturbance caused by mixing with a true target, by implementing a target judgement to discard a secondary radar target alone not consolidated with a primary radar target within a set area as well as outside an altitude range to remove a reflection target intrinsic to a secondary radar. CONSTITUTION:A primary/secondary radar target detection circuit 10 detects a primary radar target and a secondary radar target independently and then, performs a consolidation by correlation processing to send a primary/secondary radar target 2 singly or consolidated to a target judgement circuit 22. Receiving the primary/secondary radar target 2, the target judgement circuit 22 inputs a magnetic bearing/distance data 3 from an area setting circuit 20 for which are set a magnetic bearing and distance and also an altitude data 4 indicating an altitude range from an altitude setting circuit 21 to remove a secondary radar target within the area given as well as outside the altitude range to send a delivery target data 5.

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a primary/secondary target testing system, and in particular to -
Detects the next radar target and the secondary radar target, correlates the -order radar target and the secondary radar target, and integrates the primary radar target and the secondary radar target of the same target and detects it as a single or integrated radar target. This invention relates to a primary/secondary radar target detection method.

[Conventional technology]

Conventionally, in this type of radar target detection method, secondary radar targets including targets reflected by a reflecting object obtained from a secondary radar device are detected and sent to a connecting device.

[Problem to be solved by the invention]

In the conventional primary/secondary radar target detection method, the secondary radar-specific reflective target generated by reflective objects around the airport is
- It has the disadvantage of being detected only as a single secondary radar target without being integrated with the secondary radar.

[Means to solve the problem]

The primary/secondary radar target detection method of the present invention includes an area setting means for setting an area based on an azimuth angle and a distance range in which a secondary radar reflection target from reflecting objects around the airport occurs, and an upper and lower altitude range. and target determining means for rejecting secondary radar targets that are within the area and outside the altitude range and are not integrated with the primary radar targets.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. −
When the video signal 1 is input from the secondary radar device and the secondary radar device, the negative/secondary radar target detection circuit 10 detects the primary radar target and the secondary radar target independently, and then integrates them by correlation processing. A single or integrated primary/secondary radar target 2 is sent to the target determination circuit 22.

- The target determination circuit 22 receiving the next/secondary radar target 2,
Magnetic direction/distance data 3 is input from the area setting circuit 20 in which the magnetic direction and distance are set, and the altitude setting circuit 21
From here, altitude data 4 indicating an altitude range is input, secondary radar targets within the area and outside the altitude range are removed, and sent-out target data 5 is output. Note that the target determination circuit 22
Secondary radar targets within the altitude range set in the altitude setting circuit 21 can also be removed.

〔Effect of the invention〕

As explained above, the present invention provides area setting in which the azimuth angle and distance range are set, altitude setting in which the altitude range is set, and secondary radar targets that are within the area but are not integrated with the primary radar target outside the altitude range. By performing target judgment that only rejects reflected targets and removing reflective targets specific to secondary radar, confusion caused by mixture with true targets can be significantly suppressed, and the safety of air traffic control can be greatly improved. be.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. 1...Video signal, 2...-Next/secondary radar target,
3... Magnetic direction/distance data, 4... Altitude data, 5
. . . Transmission target data, 10 . . . -Next/secondary radar target detection circuit, 20 . . . Area setting circuit, 21 Altitude setting circuit, 22 . . . Target determination circuit. Agent Patent Attorney Oto Uchihara

Claims (1)

[Claims] area setting means for setting an area based on the azimuth angle and distance range in which secondary radar reflection targets from reflecting objects around the airport occur; altitude setting means for setting upper and lower altitude ranges; 1. A primary/secondary radar target detection method comprising target determination means for rejecting primary radar targets that are out of range and secondary radar targets that are not integrated.