KR20230164345A - Method for removing false target of Airport Surveillance Radar - Google Patents

Abstract

To minimize the inevitable occurrence of pulse targets when operating an air traffic control system consisting of an airport surveillance radar (PSR/SSR: Primary/Secondary surveillance radar) and a control system (ARTS-Automated radar terminal system). A pulse target removal device is disclosed. The pulse target removal device includes an input unit that receives radar track data from the airport surveillance radar, a decoding unit that decodes the radar track data, and processes delay-free tracking on the decoded track data based on a tracking algorithm to generate final track data. It is characterized by comprising a processing unit that determines whether or not to transmit the final track data according to the determination of whether or not the pulse target is included.

Description

Device and method for removing pulse target of airport surveillance radar {Method for removing false target of Airport Surveillance Radar}

The present invention relates to pulse target removal technology, and more specifically, to the pulse target (pulse target) that inevitably occurs when operating an air traffic control system consisting of an airport surveillance radar (PSR/SSR) and a control system (ARTS-Automated radar terminal system). It relates to a pulse target removal device and method to minimize the occurrence of false targets.

In particular, the present invention relates to an apparatus and method for adding and designing a pulse target removal device, a type of radar post-processing device, between an airport surveillance radar and a control system.

Airport surveillance radar consists of a primary radar (PSR-Primary surveillance radar) and a secondary radar (SSR-Secondar surveillance radar). The primary radar transmits powerful radio waves to detect aircraft and identifies the aircraft's location by receiving signals that are reflected from the aircraft fuselage.

Meanwhile, the secondary radar uses a transponder mounted on the aircraft to identify the location of the aircraft through a question-and-answer method between the radar and the aircraft. In addition to the location of the aircraft, the altitude and aircraft identification code are recorded by the radar. There are features that can be detected.

Both the primary and secondary radars detect aircraft that do not actually exist, and this is called a pulse target. Since a pulse target refers to a misidentified track output at the report level, it is different from clutter, which refers to noise or interference signals among the video signals of the primary radar.

Pulse targets can also occur in secondary radars that use the question/response function with aircraft due to the same reasons as ground reflection and back response.

The airspace control performed by the ACC (Area control center) or the approach control system performed by region consists of an airport surveillance radar and a control system (ARTS-Automated radar terminal system). If the radar operates ideally, there will be no pulse targets, but the occurrence of pulse targets to some extent is inevitable due to complex air traffic conditions, clutter caused by waves, reflected waves by cars and buildings on the ground, and seasonal temperature inversions.

In this way, the design of an appropriate suppression method for pulse targets is a very important issue when operating an air traffic control system. In general, air traffic control systems suppress pulse targets through target tracking.

A common target tracking method in air traffic control systems is 3-scan filtering, which is because 3 scans are the minimum scan unit that can calculate the speed and heading of the track. When applying 3-scan filtering, the first 2 scans are generally ignored and the 3rd scan is displayed.

1. Republic of Korea Patent No. 10-2017-0112201

The present invention was proposed to solve the problems caused by the above background technology, when operating an air traffic control system consisting of an airport surveillance radar (PSR/SSR: Primary/Secondary surveillance radar) and a control system (ARTS-Automated radar terminal system). To minimize the inevitable occurrence of false targets, The purpose is to provide a pulse target removal device and method.

In addition, the present invention can eliminate the processing delay time of the overall air traffic control system by determining whether the input track is an immediate pulse target while achieving the original function of removing the pulse target. Another purpose is to provide a pulse target removal device and method.

In order to achieve the task presented above, the present invention is designed to solve problems that inevitably occur when operating an air traffic control system consisting of an airport surveillance radar (PSR/SSR: Primary/Secondary surveillance radar) and a control system (ARTS-Automated radar terminal system). To minimize the occurrence of pulse targets A pulse target removal device is provided.

The pulse target removal device,

An input unit that receives radar track data from the airport surveillance radar;

A decoding unit that decodes the radar track data;

a processing unit that processes delay-free tracking on the decoded track data based on a tracking algorithm to generate final track data; and

It is characterized in that it includes a; a determination unit that determines whether or not to transmit the final track data according to the determination of whether or not the pulse target is present.

In addition, the decoding unit is characterized in that it obtains the location, altitude, and code of the detection aircraft from the radar track data output from the airport surveillance radar.

In addition, the altitude and code are information limited to secondary surveillance radar (SSR) radar, and the location is converted into a map-centered rectangular coordinate system.

In addition, in order to prevent incorrect tracking calculations, the processing unit converts the radar track data into detection time, speed, code, altitude, and It is characterized by including a tracking list management module that compares the progress direction.

In addition, the processing unit may include a new track creation module that creates a new track if the correlation score preset through the comparison is not satisfied.

In addition, the processing unit is characterized by including a separation target processing module that determines the track separation phenomenon when there is an existing update track around the new track and determines the track to be a normal track rather than a pulse target.

In addition, the processing unit is characterized in that it includes a tracking map management module that manages user-based tracking parameters in the form of a map in consideration of the actual map and the creation environment of the pulse target for each region.

In addition, the map includes a PSR blank area where primary surveillance radar (PSR) targets are deleted from the area, an SSR blank area where SSR (secondary surveillance radar) targets are deleted from the area, and a corresponding area. Non-initialization area, where existing tracked targets can pass but no new targets are created, and Termination area, which is an area where deletion of tracks that make up the tracking list is promoted in the area. It is characterized by a tracking parameter area that minimizes the occurrence of pulse targets by adjusting the speed, direction, and number of tracking scans of the track for tracking.

In addition, when an airport area is designated as the end area, the landed aircraft is immediately deleted from the member tracks constituting the tracking list after one scan.

Additionally, the tracking algorithm is characterized as GNN (Global Nearest Neighbor).

Additionally, the radar track data is characterized in that it is in Asterix format.

In addition, when preset scan filtering is applied, if preset conditions are met, it passes through the pulse target removal device.

At this time, the above condition attempts association using at least one of speed and heading according to the association score, and in the case of an SSR (Secondary surveillance radar) target, an SQ (Squawk) code and an ICAO (International Civil Aviation Organization) address are used together. It is characterized by attempting a connection using .

On the other hand, another embodiment of the present invention includes: (a) an input unit receiving radar track data from an airport surveillance radar; (b) a decoding unit decoding the radar track data; (c) a processing unit processing delay-free tracking on the decoded track data based on a tracking algorithm to generate final track data; and (d) determining whether or not to transmit the final track data according to the decision of whether or not the final track data is a pulse target. It provides a pulse target removal method of an airport surveillance radar.

According to the present invention, pulse target removal is performed in the airport surveillance radar and control system, but pulse target removal performance can be improved by adding a pulse target removal function in an independent radar post-processing system.

In addition, another effect of the present invention is that the stability of the overall air traffic control system can be improved by reducing the load on the airport surveillance radar or air traffic control system.

In addition, another effect of the present invention is that adding a radar post-processing system inevitably causes a delay in target detection, which can affect the performance of the entire air traffic control system, so a GNN (Global nearest neighbor)-based data processing system is specially designed. By designing it in such a way, it is possible to immediately determine whether the pulse target system is a pulse target.

In addition, another effect of the present invention is that it is different from existing inventions that deal with video signals and received pulses by removing the pulse target at the target detection report level without processing delay.

1 is a block diagram of the configuration of an airport operation environment according to an embodiment of the present invention.
Figure 2 is a detailed block diagram of the pulse target removal device shown in Figure 1.
FIG. 3 is a detailed block diagram of the processing unit shown in FIG. 2.
Figure 4 is a flow chart showing the process of determining whether to use a pulse target according to an embodiment of the present invention.
FIG. 5 is a flowchart showing the tracking processing steps shown in FIG. 4 in detail.
Figure 6 is a diagram schematically illustrating the track detected by one aircraft operating four scans of the radar according to an embodiment of the present invention.
Figure 7 is a diagram of separation target processing according to an embodiment of the present invention.

Since the present invention can be modified in various ways and can have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

When describing each drawing, similar reference numerals are used for similar components.

Terms such as first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

For example, a first component may be referred to as a second component, and similarly, the second component may be referred to as a first component without departing from the scope of the present invention. The term “and/or” includes any of a plurality of related stated items or a combination of a plurality of related stated items.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by a person of ordinary skill in the technical field to which the present invention pertains.

Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as having an ideal or excessively formal meaning unless explicitly defined in the present application. It shouldn't be.

Hereinafter, a pulse target removal device and method for an airport surveillance radar according to an embodiment of the present invention will be described in detail with reference to the attached drawings.

Figure 1 is a block diagram of the airport operation environment 100 according to an embodiment of the present invention. Referring to FIG. 1, the airport operating environment 100 includes an airport surveillance radar 110 that generates radar track data, a pulse target removal device 120 that removes a false target from the radar track data, and a radar track data. It consists of a control system 130 that receives the final radar track data from which the pulse target has been removed from the data and performs control.

Here, PSR is a primary surveillance radar (PSR), which transmits strong radio waves to detect aircraft and identifies the location of the aircraft by receiving signals reflected from the aircraft fuselage. SSR is a secondary radar (SSR), which uses a transponder mounted on the aircraft to identify the location of the aircraft through a question-and-answer method between the radar and the aircraft. It has the feature of being able to detect altitude and aircraft identification code on radar. ARTS is Automated radar terminal system.

FIG. 2 is a detailed block diagram of the pulse target removal device 120 shown in FIG. 1. Referring to FIG. 2, the pulse target removal device 120 includes an input unit 210 that receives radar track data, an input unit 210 that receives radar track data from the airport surveillance radar 110, and decodes the radar track data. A decoding unit 220, a processing unit 230 that generates final track data by processing delay-free tracking on the decoded track data based on a tracking algorithm, and determines whether or not the final track data is delivered according to the determination of whether or not the final track data is a pulse target. It may be configured to include a decision unit 240 that makes a decision.

The input unit 210 performs the function of receiving radar track data. To elaborate, it performs the function of receiving radar track data output from the airport surveillance radar 110. To this end, the input unit 210 may be configured to include a microprocessor, communication circuit, memory, etc.

Memory is a flash memory type, hard disk type, multimedia card micro type, or card type memory (for example, SD (Secure Digital) or XD (eXtreme Digital). Memory, etc.), RAM (Random Access Memory), SRAM (Static Random Access Memory), ROM (Read Only Memory, ROM), EEPROM (Electrically Erasable Programmable Read Only Memory), PROM (Programmable Read Only Memory), magnetic memory , may include at least one type of storage medium among a magnetic disk and an optical disk. Additionally, it may operate in connection with web storage and cloud servers that perform storage functions on the Internet.

The decoding unit 220 may include a process of acquiring the location, altitude, and code of the detected aircraft from radar track data output from the airport surveillance radar 110. In this case, the aircraft's altitude and code are information limited to the SSR radar. Additionally, the decoder 220 can infer the location of the aircraft. In this case, since the aircraft location is in a polar coordinate system centered on the radar antenna, a process of converting it into a map-centered rectangular coordinate system may be further included.

The processing unit 230 includes a tracking list management module that manages the tracking list, a new track creation module that creates a new track, a tracking end processing module that processes the end of tracking, a tracking update processing module that processes tracking updates, and a separation target. It may be configured to include a separation target processing module for processing, a tracking map management module for managing the tracking map, etc. The configuration of the processing unit 230 is shown in FIG. 3 and will be described later.

The decision unit 240 performs a function of determining whether to transmit radar track data according to the determination of whether or not the radar track data is a pulse target in the previous step.

FIG. 3 is a detailed block diagram of the processing unit 230 shown in FIG. 2. Referring to FIG. 3, the processing unit 230 includes a tracking list management module 310 that manages the tracking list, a new track creation module 320 that creates a new track, and a tracking end processing module 330 that processes the end of tracking. , It may be configured to include a tracking update processing module 340 that processes tracking updates, a separation target processing module 350 that processes separation targets, and a tracking map management module 360 that manages the tracking map.

The tracking list management module 310 performs the function of managing a list related to tracking (association) of a detection track. To elaborate, the trajectory of each aircraft target is tracked and compared with the tracking list.

In other words, since the track input order and the detection time on the track data are not accurately aligned according to the detection characteristics of the airport surveillance radar 110, they are not compared with tracks in the tracking list that are temporally future than the input track. Radar track data showing the detection time, speed, code, altitude, and direction of travel with the original enemy constituting the tracking list before one scan (i.e., one scan) of the radar antenna of the airport surveillance radar 110 more accurately than the input track. (i.e. input track) to prevent incorrect tracking calculations.

Here, the tracking list refers to a list of aircraft currently in flight or estimated to be in flight in the radar scan. When a new track is entered, if the track is successfully associated with the existing tracking list, the new track can be judged to be an extension of the existing track. The tracking list management module 310 must maintain only a list of tracks that are flying or estimated to fly in the current scan by deleting tracks whose flight has ended or whose detection has been lost, and holds calculation results for the heading, speed, etc. of the tracks.

The new track creation module 320 performs the function of creating a new track for a new aircraft. To elaborate, if the minimum correlation score preset through comparison between the input track and the configuration track managed by the tracking list management module 310 is not satisfied, it is determined to be a new track and a new track is created.

The management method (example) of the correlation score is as follows.

①. If a track is entered and determined to be a new track, 1 point is given, if 1 connection is successful, 2 points are given, and if additional connection is successful, 3 points are given.

②. The maximum correlation score is maintained at 3 points in a 3 scan filtering environment.

③. If the track managed by the trekking list, which is worth 3 points, fails to link the track because it is lost due to undetected or landing, -1 point is given, and the trekking list is updated with the predicted location considering the speed of the aircraft.

④. If the trekking list with a score of -1 fails to relate the track, a score of -2 is given, and the trekking list is updated to the predicted location considering the aircraft speed.

⑤. If a trekking list with a score of -2 fails to associate a track, it is deleted from the trekking list.

⑥. -Trekking list worth 2 points

⑦. Tracks that fail to connect more than three times in a row are removed from the trekking list.

⑧. For tracks with a correlation score of 1, heading cannot be investigated and only speed must be investigated to determine whether or not they are related.

⑨. In situations where the correlation score is more than 2 points or -1 or -2 points, the associated trail is found using the trail entered at the time of association and the heading and speed information of the trekking list.

⑩. When tracking a connection using heading, a connection using heading is not made for tracks with slow speeds.

When the tracking update processing module 340 processes the tracking update for the input track and the tracking list composition track with the highest correlation score according to the tracking algorithm algorithm, the new track creation module 320 determines the speed and direction of the track. Calculate and store (heading). The tracking algorithm is the GNN (Global nearest neighbor) algorithm. GNN (Global nearest neighbor) algorithm is an algorithm used for tracking (association) of detected tracks. It observes tracks for each radar scan, calculates scores for correlation between tracks, and determines the track with the highest score as the same track. am. In other words, GNN (Global nearest neighbor) is the problem of selecting the most similar among n pieces of data in response to a request. Data is expressed as points in a two-dimensional flat space.

To elaborate, the GNN algorithm is used for trekking in the following way. The GNN algorithm compares the tracking list and the input track one-to-one to determine whether it is a new or updated track, and associates the input track with the track in the tracking list that has the closest distance (distance is calculated as speed) and the closest heading value. It is used. Associating the closest tracks means that they are neighbor tracks.

The tracking end processing module 330 checks the current time and deletes old tracks (tracks created a long time ago based on a preset time) from the list to minimize the number of tracks in the tracking list. The tracking list must be kept to a minimum to reduce the amount of computation of the overall system and prevent too many past tracks from being associated during the tracking process.

The separation target processing module 350 is performed in parallel with the creation of a new track in the new track creation module 320. Although it is a new track, if there is an existing update trail around the new track, it is judged to be a trail separation phenomenon and the pulse target is It is judged to be normal flight.

The separation target processing module 350 shows the main difference between general tracking and tracking for pulse target determination. In general tracking, a time-window must be allocated to make the most reasonable tracking calculation when processing the separation target. This inevitably requires some time delay.

However, tracking for pulse target determination does not use correlation information between tracks, but only determines whether the track has a pulse target, making it possible to perform track tracking without time delay. Pulse target judgment tracking without delay is the main differentiator of the present invention.

To elaborate, the general result of tracking is to assign a tracking number to individual track data. Therefore, in order to completely confirm whether there is a connection between tracks, a processing time delay is essential to check the correlation between future tracks.

In contrast, tracking for pulse target removal only manages and maintains tracking numbers in individual track data internally in the pulse target removal device, and does not record/assign tracking numbers to track data and transmit them. Therefore, when a track with the possibility of target separation occurs, it is judged not to be a pulse target based on the possibility alone, and the corresponding track data is immediately transmitted to the control system, so there is no processing delay.

The tracking map management module 360 performs the function of managing user-based tracking parameters in the form of a map, taking into account the actual map and the creation environment of regional pulse targets.

Radar tracking is dependent on environmental factors (parameters) based on the map. For example, the runway where an aircraft lands is a place where tracking ends due to landing frequently occur. To prevent unnecessary predictions, it is advisable to set the area as the tracking end area.

Additionally, if a pulse target occurs in an area that is not important in terms of air traffic control around the airport, permanent track deletion to the PSR blank or MSSR blank area may be required. In addition, since the moving speed of the aircraft is different around the airport and the outskirts of the airport, these differences in the moving speed of the aircraft and the location of the heading must be taken into consideration to completely remove the pulse target, so tracking parameters must be managed in map form.

Accordingly, the tracking map management module 360 has a map consisting of the following features.

① PSR blank area: PSR target is deleted from the area.

② SSR Blank area: SSR target is deleted from the area.

③ Non-initialization area: New targets are suppressed in the area. Existing tracked targets can pass through, but new targets are not created. If a trail is created in the relevant area, it will be displayed on the screen only if it leaves the area.

④ Termination area: This is an area where deletion of tracks that make up the tracking list is promoted. In other words, if the airport area is designated as the termination area, the landed aircraft is immediately deleted from the member tracks that make up the tracking list after one scan, preventing incorrect tracking calculations.

⑤ Tracking Parameter Area: Minimizes the occurrence of pulse targets by adjusting the speed, direction, and number of tracking scans for tracking by area.

The decoding unit, processing unit, decision unit, and module shown in FIGS. 2 and 3 refer to units that process at least one function or operation, and may be implemented in software and/or hardware. In hardware implementation, an application specific integrated circuit (ASIC), digital signal processing (DSP), programmable logic device (PLD), field programmable gate array (FPGA), processor, microprocessor, and other devices designed to perform the above-described functions. It may be implemented as an electronic unit or a combination thereof.

In software implementation, software composition components (elements), object-oriented software composition components, class composition components and task composition components, processes, functions, properties, procedures, subroutines, segments of program code, drivers, firmware, microcode, data. , databases, data structures, tables, arrays, and variables. Software, data, etc. can be stored in memory and executed by a processor. The memory or processor may employ various means well known to those skilled in the art.

Figure 4 is a flow chart showing the process of determining whether to use a pulse target according to an embodiment of the present invention. Referring to FIG. 4, radar track data decoding is performed to extract a track from the output unit of the airport surveillance radar 110 (step S410). The format of the radar track data is the Asterix format, and the airport surveillance radar 110 can be FPS-117.

Afterwards, GNN-based delay-free tracking is processed on the decoded track data (step S420). Meanwhile, in the tracking processing step, this step can be omitted for aircraft that do not need to determine whether the aircraft squawk (SQ) code is a pulse target, such as “2000.” In other words, according to ICAO (International Civil Aviation Organization), SQ 2000 refers to an aircraft moving on the ground, so airport surveillance radar does not perform detection as necessary.

Afterwards, it is determined whether or not to transmit the radar track data according to the determination of whether or not the radar track data is a pulse target in the previous step (step S430).

FIG. 5 is a flowchart showing the tracking processing step (S420) shown in FIG. 4 in detail. Referring to FIG. 5, the tracking list management module 310 manages a list related to tracking (association) of the detection track (step S510). To elaborate, the trajectory of each aircraft target is tracked and compared with the tracking list.

If it is determined to be a new track according to the comparison result, the new track creation module 320 creates a new track for the new aircraft (step S520). To elaborate, if the minimum correlation score preset through comparison between the input track and the configuration track managed by the tracking list management module 310 is not satisfied, it is determined to be a new track and a new track is created.

Afterwards, the tracking end processing module 330 checks the current time, deletes old tracks (tracks created a long time ago based on a preset time) from the list, minimizes the number of tracks in the tracking list, and processes tracking updates. Module 340 performs tracking update (steps S530 and S540).

Afterwards, if the separation target processing module 350 is a new track, but there is an existing update track around the new track, this is judged to be a track separation phenomenon and determined to be a normal track rather than a pulse target (step S550).

Thereafter, the tracking map management module 360 performs a function of managing user-based tracking parameters in the form of a map by considering the actual map and the creation environment of the pulse target for each region (step S560).

Figure 6 is a diagram schematically illustrating the track detected by one aircraft operating four scans of the radar according to an embodiment of the present invention. Referring to FIG. 6, from t1 to t4 each means one radar scan. Here, t means time and t4 means it was detected on the 4th scan by the airport surveillance radar.

The aircraft is first detected at t1, and is located at t2 in the next scan.

At t2, the speed of the aircraft is first calculated.

At t3, this is the stage where the aircraft's speed and heading (heading) are first calculated. 3 When applying scan filtering, from t3 onwards, if the conditions are met, it passes through the pulse target removal device.

In detail, the association method used in the present invention is as follows. For tracks with a correlation score of 1, correlation is attempted using only speed. Tracks with a correlation score of 2 or more are attempted to be correlated using heading and speed together. In the case of secondary radar (SSR: Secondary surveillance radar) targets, association is attempted using the SQ (Squawk) code and ICAO address together.

Among the features of the present invention, the absence of delay means that a determination as to whether or not the pulse target is a pulse target is made immediately as soon as the t1, t2, t3, and t4 tracks are input. In a general tracking system, time delay occurs because it has a time-window for a certain period of time.

Figure 7 is a diagram of separation target processing according to an embodiment of the present invention. Referring to FIG. 7, t1 means time1 and means a track detected for each radar scan. In the case of general tracking in the association step between t2 and t3, it is necessary to evaluate and decide whether t2->t3 or t2->t3’ is optimal.

Therefore, for tracking calculations, a delay is required during the time-window waiting for the optimal track that may be input in the future at the time of t3 data reception.

Meanwhile, in tracking for pulse target determination, both t3 and t3' must be recognized as separate targets and determined not to be pulse targets, so there is no need to check whether t3' is input at time t3. Therefore, when t3 target is input, it is possible to immediately determine whether it is a pulse target.

Additionally, the steps of the method or algorithm described in relation to the embodiments disclosed herein are implemented in the form of program instructions that can be executed through various computer means such as a microprocessor, processor, CPU (Central Processing Unit), etc., and are computer readable. Can be recorded on any available medium. The computer-readable medium may include program (instruction) codes, data files, data structures, etc., singly or in combination.

The program (instruction) code recorded on the medium may be specially designed and constructed for the present invention, or may be known and usable by those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical media such as CD-ROM, DVD, Blu-ray, and ROM (Read Only Memory). ), RAM (Random Access Memory), flash memory, etc. may include specially configured semiconductor memory elements to store and execute program (instruction) codes.

Here, examples of program (instruction) code include not only machine language code such as that created by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

100: Airport operating environment
110: Airport surveillance radar 120: Pulse target removal device
130: Control system
210: input unit 220: decoding unit
230: processing unit 240: decision unit
310: Tracking list management module 320: New track creation module
330: Tracking end processing module 340: Tracking update processing module
350: Separation target processing module 360: Tracking map management module

Claims (14)

An input unit 210 that receives radar track data from the airport surveillance radar 110;
A decoding unit 220 that decodes the radar track data;
A processing unit 230 that processes delay-free tracking on the decoded track data based on a tracking algorithm to generate final track data; and
A decision unit 240 that determines whether to transmit the final track data according to the determination of whether it is a pulse target or not;
Pulse target removal device for airport surveillance radar, comprising:
According to claim 1,
The decoding unit 220 is a pulse target removal device for an airport surveillance radar, characterized in that the location, altitude, and code of the detected aircraft are obtained from the radar track data output from the airport surveillance radar 110.
According to claim 2,
The altitude and code are information limited to secondary surveillance radar (SSR) radar, and the location is converted to a map-centered rectangular coordinate system. Pulse target removal device for airport surveillance radar.
According to claim 1,
In order to prevent incorrect tracking calculations, the processing unit 230 combines the radar track data with the detection time, speed, and code of the original target constituting the tracking list corresponding to one scan before the radar antenna of the airport surveillance radar 110. A pulse target removal device for an airport surveillance radar, comprising a tracking list management module 310 that compares , altitude, and direction of travel.
According to claim 4,
The processing unit 230 includes a new track creation module 320 that generates a new track if the correlation score preset through the comparison is not satisfied.
According to claim 4,
The processing unit 230 includes a separation target processing module 350 that determines a track separation phenomenon when there is an existing updated track around the new track and determines the track to be a normal track rather than a pulse target. Radar pulse target removal device.
According to claim 4,
The processing unit 230 is a tracking map management module 360 that manages user-based tracking parameters in the form of a map in consideration of the actual map and regional pulse target generation environment. Pulse target removal device.
According to claim 7,
The map is a PSR blank area where primary surveillance radar (PSR) targets are deleted from the area, an SSR blank area where SSR (secondary surveillance radar) targets are deleted from the area, and an existing SSR blank area in the area. Tracked targets can pass through but no new targets are created in the non-initialization area, the termination area is an area where deletion of tracks that make up the tracking list is promoted, and tracking by area. A pulse target removal device for an airport surveillance radar, characterized in that it consists of a tracking parameter area that minimizes the occurrence of pulse targets by adjusting the speed, direction, and number of tracking scans of the wake. According to claim 8,
A pulse target removal device for an airport surveillance radar, characterized in that when the airport area is designated as the end area, the landed aircraft is immediately deleted from the member tracks constituting the tracking list after one scan.
According to claim 1,
A pulse target removal device for an airport surveillance radar, wherein the tracking algorithm is GNN (Global Nearest Neighbor).
According to claim 1,
A pulse target removal device for an airport surveillance radar, wherein the radar track data is in Asterix format.
According to claim 1,
A pulse target removal device for an airport surveillance radar, characterized in that it passes through the pulse target removal device when preset conditions are met when applying preset scan filtering.
According to claim 12,
The above condition attempts association using at least one of speed and heading according to the association score, and in the case of an SSR (Secondary surveillance radar) target, an SQ (Squawk) code and an ICAO (International Civil Aviation Organization) address are used together. Pulse target removal device for airport surveillance radar, characterized in that it attempts correlation.
(a) the input unit 210 receiving radar track data from the airport surveillance radar 110;
(b) decoding the radar track data by the decoding unit 220;
(c) the processing unit 230 processing delay-free tracking on the decoded track data based on a tracking algorithm to generate final track data; and
(d) the decision unit 240 determining whether to transmit the final track data according to the determination of whether or not the final track data is a pulse target;
A pulse target removal method for an airport surveillance radar, comprising: