JPH08226968A - Radar control transferring metho, and radar signal processor - Google Patents

Abstract

PURPOSE: To more accurately and smoothly transfer a data control from an ASR/SRR to an ASDE. CONSTITUTION: If a target tracked by a tracking processor 1 is decided to reach out of the coverage of an ASR/SRR by a coverage deciding unit 2, a landing runway is estimated by utilizing weather information and a flight plan in addition to the position and the advancing direction. The process in an interpolating calculator 5 can be accurately executed as compared with the case in which the runway is estimated only by the position and the advancing direction, and the transfer of a radar control from the ASR/SRR to an ASDE can be more accurately and smoothly executed. Not only the runway but also the landing speed and the landing position may be estimated. The altitude change which indicates an advancing angle, the estimating error obtained by a correlation processor 6 and the output of a PAR may be utilized instead of the weather information and the flight plan.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an airport surveillance radar (Airpor) for controlling a target such as an aircraft approaching an airport.
t Surveillance Radar (ASR) and secondary surveillance radar (Se
From Condary Surveillance Radar (SSR) to Airport Surface Detecting Equipment (AS)
The present invention relates to a radar transfer method for transferring radar control to DE), and further relates to a radar signal processing device for executing this method.

[0002]

2. Description of the Related Art ASR, SSR, ASDE, PAR are used as radars for controlling targets such as aircraft approaching an airport.
(Precision Approach Radar: PAR) and the like are known. As shown in FIG. 6, ASR / SSR coverage and A
Between the coverage areas of the SDE there are areas that are not covered by either ASR / SSR or ASDE. Therefore,
As targets such as aircraft enter the airport, ASR / SS
In order to transfer the radar control from R to ASDE, it is necessary to perform an interpolation calculation for the movement of the target from the time when the target leaves the ASR / SSR coverage area until it enters the ASDE coverage area.

FIG. 7 shows the configuration of a radar signal processing device used to transfer radar control from ASR / SSR to ASDE.

In this conventional example, first, ASR / S
Information such as the target position and the traveling direction detected by SR is input to the tracking processing unit 1. The tracking processing unit 1 uses the ASR
/ Track the target detected by the SSR by a known method. The coverage determination unit 2 determines whether or not the target tracked by the tracking processing unit 1 has exited the ASR / SSR coverage. If it is determined that the target is out of the ASR / SSR coverage area, that is, if the distance from the ASR / SSR antenna to the target is smaller than the minimum detection distance of the ASR / SSR, the landing runway estimation unit 3, the landing runway edge estimation using the landing runway estimation table 4 is executed. Landing runway estimation table 4 is ASR / SS
It is a table in which the position and traveling direction of the target at the time of leaving the coverage area of R, that is, the interpolation start position and traveling direction are associated with the runway at which the target is supposed to land when viewed from the position and traveling direction. The landing runway estimation unit 3 indicates that the target which has been tracked by the tracking processing unit 1 up to that point and which is determined to be out of the coverage area by the coverage area determination unit 2.
The landing runway estimation table 4 is referred to from the interpolation start position / travel direction obtained from the SR / SSR via the tracking processing unit 1, and the landing runway is estimated by this. Interpolation calculation unit 5
Is assumed to make a constant-velocity linear motion from the interpolation start position of the target determined to have left the coverage area to the landing runway end obtained by estimation, and the position of the target , Interpolation calculation of traveling direction, speed, etc. is performed. Correlation processing unit 6
Uses the information such as the target position obtained by the interpolation calculation unit 5 as the correlation distance with the output of ASDE. as a result,
When the correlation between the target detected by ASDE and the information obtained by the interpolation calculation unit 5 is obtained, the radar control is transferred from ASR / SSR to ASDE. After this, the target approaching the airport is radar controlled by ASDE.

[0005]

However, in the conventional device having such a configuration, the ASR / SS
There is a problem that it is difficult to transfer radar control from R to ASDE accurately and smoothly. In other words, the target motion is not uniquely determined by the position and traveling direction at the time when the ASR / SSR is out of the coverage area, and therefore the landing runway estimation based on these motions also contains an error. The transfer of radar control executed based on the calculation results also lacks accuracy and smoothness.

The present invention has been made to solve such a problem, and it is possible to start interpolation of the target behavior from the exit of the ASR / SSR coverage area to the entry of the ASDE coverage area. It is an object of the present invention to make it possible to transfer radar control from ASR / SSR to ASDE more accurately and smoothly by making an estimation using auxiliary information in addition to information such as time position. Another object of the present invention is to achieve the above object while utilizing information obtained from existing facilities and systems. An object of the present invention is to make it possible to transfer radar control accurately regardless of changes in the environment.

[0007]

In order to achieve such an object, the first structure of the present invention is an ASR and / or S
From the ASR and / or the SSR to the ASDE with respect to the target entering the ASDE coverage from the SR coverage through an interpolation region that is not a coverage of any of the ASR, SSR and ASDE
In the radar control transfer method for transferring radar control, the target motion state at the time of leaving the coverage of ASR and / or SSR and entering the interpolation region is set as the motion state at the start of interpolation from ASR and / or SSR. The steps to enter,
A step of inputting auxiliary information indicating a behavior that the target can take after entering the interpolation area, and a step of estimating a target motion state after entering the interpolation area based on the motion state and auxiliary information at the start of interpolation, When a correlation is found between the target motion state obtained by the estimation and the output of ASDE, it is considered that the target has exited the interpolation area and entered the ASDE coverage area, and the radar is changed from ASR and / or SSR to ASDE. And a fourth step of transferring control.

According to the second aspect of the present invention, when estimating the target motion state after entering the interpolation area, first, the runway which is considered to land the target based on the motion state and auxiliary information at the start of interpolation. , The target landing speed and / or the target landing position is obtained, and the target motion state after entering the interpolation area is estimated based on the obtained runway, landing speed and / or landing position, and the motion state at the start of interpolation It is characterized by doing.

The radar control transfer method according to the third aspect of the present invention further includes a database for associating the motion state and auxiliary information at the start of interpolation with the runway, landing speed and / or landing position at the start of interpolation. The runway, landing speed, and / or landing position are obtained by referring to the motion state and auxiliary information, and the target motion state and A obtained by estimation are obtained.
It is characterized in that the estimation error of the target motion state is detected based on the output of the SDE, and the contents of the database are corrected and updated so that the estimation error is reduced based on the detected estimation error.

In the radar control transfer method according to the fourth aspect of the present invention, when estimating the target motion state after entering the interpolation area by the second configuration, at least the target position is determined as the motion state at the start of interpolation. , As the auxiliary information, information indicating the weather conditions of the airport and / or the runway length required by the target, respectively, is obtained, and the runway that the target is supposed to land on is calculated based on the motion state at the start of interpolation and the auxiliary information. It is characterized in that the target motion state after entering the interpolation region is estimated on the basis of the obtained runway and the motion state at the start of interpolation and assuming that the target moves in a uniform linear motion.

In the radar control transfer method according to the fifth aspect of the present invention, when estimating the target motion state after entering the interpolation area by the second configuration, at least the target position is determined as the motion state at the start of interpolation. , And the speed, as auxiliary information, information indicating the weather conditions of the airport and / or the runway length required by the target are input, and the target landing speed is calculated based on the motion state at the start of interpolation and the auxiliary information. It is characterized in that the motion state of the target after entering the interpolation region is estimated based on the landing speed and the motion state at the start of interpolation and assuming that the target moves in a uniform acceleration linear motion.

In the radar control transfer method according to the sixth structure of the present invention, the auxiliary information used in the fourth and fifth structures is used as the information indicating the weather condition of the airport as the wind direction of the airport or its vicinity and And / or including weather information indicating wind speed. In the radar control transfer method according to the seventh configuration of the present invention, the auxiliary information used in the fourth and fifth configurations is:
The information indicating the runway length required by the target includes type information indicating the type of the target.

In the radar control transfer method according to the eighth aspect of the present invention, when estimating the target motion state after entering the interpolation area by the second configuration, at least the target position is determined as the motion state at the start of interpolation. , The information indicating the approach angle of the target as auxiliary information, respectively, to obtain the runway and the landing position of the target on the runway that the target is supposed to land based on the motion state at the start of interpolation and the auxiliary information, It is characterized in that the motion state of the target after entering the interpolation region is estimated on the basis of the obtained runway and landing position and assuming that the target moves at a uniform linear velocity.

In the radar control transfer method according to the ninth aspect of the present invention, when estimating the target motion state after entering the interpolation area by the second configuration, at least the target position is determined as the motion state at the start of interpolation. And the speed, and the information indicating the approach angle of the target as auxiliary information, respectively, and based on the motion state at the start of interpolation and the auxiliary information, the runway at which the target is expected to land and the target landing position on the runway. Seeking,
It is characterized in that the motion state of the target after entering the interpolation region is estimated on the basis of the obtained runway and landing position and assuming that the target moves in a straight line with uniform acceleration.

In the radar control transfer method according to the tenth structure of the present invention, when the auxiliary information is input in the eighth and ninth structures, the ASR and / or the SSR are removed from the coverage area and the ASR is entered before entering the interpolation area. And / or the target altitude is sequentially input from the SSR, the target altitude change rate is calculated based on the input altitude, and the calculated altitude change rate is used as information indicating the target approach angle.

A radar control transfer method according to an eleventh configuration of the present invention is to use a target motion state and AS obtained by estimation.
A feature is that an estimation error of the target motion state is detected based on the output of the DE, and the detected estimation error is input as auxiliary information.

A radar control transfer method according to a twelfth structure of the present invention is characterized in that a target motion state obtained by PAR is inputted as auxiliary information.

The radar signal processing apparatus according to the thirteenth configuration of the present invention detects that the target has exited the coverage area of ASR and / or SSR and has entered an interpolation area which is not the coverage area of ASR, SSR or ASDE. Means for inputting a target motion state when the ASR and / or SSR is out of the coverage area and enters the interpolation area from the ASR and / or SSR as a motion state at the start of interpolation, and the interpolation area is entered. A means for inputting auxiliary information indicating the behavior that the target can take later, a means for estimating the target motion state after entering the interpolation region based on the motion state and auxiliary information at the start of interpolation, and obtained by estimation. When a correlation is found between the target motion state and the output of ASDE, it is considered that the target has left the interpolation area and entered the area of ASDE, and ASR and / or SSR
Means for transferring radar control to the SDE.

[0019]

In the first and thirteenth configurations of the present invention, first, the target of the aircraft or the like exits the coverage area of ASR and / or SSR and enters the interpolation area that is not the coverage area of any of ASR, SSR and ASDE. Is detected. Further, the target motion state at that time is input from the ASR and / or SSR as the motion state at the start of interpolation. In estimating the target motion state after entering the interpolation region, in addition to the input motion state at the start of interpolation, auxiliary information indicating the behavior that the target can take after entering the interpolation region is used. If a correlation is found between the target motion state and the ASDE output obtained as a result, the target leaves the interpolation area and ASD
Since it can be considered to have entered the coverage area of E, a radar control transfer from ASR and / or SSR to ASDE is performed. As described above, in the present invention, not only the information on the motion state at the start of interpolation, such as the position of the target and the traveling direction, but also the auxiliary information indicating the behavior that the target can take after entering the interpolation region, Since the target motion state after entering the interpolation region is estimated, the target motion state can be estimated with higher accuracy than before in the interpolation region in which the target cannot be directly detected by any of ASR, SSR, and ASDE. Radar control can be transferred more smoothly and accurately.

The procedure for estimating the target motion state after entering the interpolation area can be constituted by, for example, a runway estimation procedure and an interpolation procedure. That is, in the second configuration of the present invention, first, based on the motion state and auxiliary information at the start of interpolation, the runway at which the target is expected to land, the target landing speed and / or the target landing position are estimated, and then Then, based on the estimated runway, landing speed and / or landing position, and the motion state at the start of interpolation, the target motion state after entering the interpolation area is estimated. With such a procedure, information obtained from an existing device or system can be used as auxiliary information, and the present invention can be realized relatively easily and inexpensively.

Further, in the third structure of the present invention,
The runway etc. is estimated using the database. At that time, the contents of the database are modified and updated based on the detected estimation error and so that the estimation error is reduced. Therefore, the target motion state can be estimated with higher accuracy, and thus the radar control can be transferred more smoothly and accurately.

As examples of information that can be used as auxiliary information, information indicating the weather conditions at the airport, information indicating the runway length required by the target, information indicating the approach angle of the target, estimation error of the target motion state, PAR There is a target motion state and the like obtained by.

First, in the fourth or fifth configuration of the present invention, information indicating the weather conditions at the airport and information indicating the runway length required by the target are used as auxiliary information. The information indicating the weather conditions at the airport indicates which runway is preferable to land in view of the weather conditions, and the information indicating the runway length required by the target is the runway of various lengths. It shows which of the runways can be used for target landing.By using this information together with the target position and speed at the start of interpolation, You can know which runway the target is likely to land on, and what the target landing speed will be. Therefore, by using these pieces of information as auxiliary information, the target motion state after entering the interpolation region can be interpolated with high accuracy by a relatively simple estimation calculation related to constant velocity linear motion or constant acceleration linear motion. It can be estimated. Further, in the sixth or the seventh configuration of the present invention, the weather information indicating the wind direction and the wind speed at the airport or the vicinity thereof and the type information indicating the type of the target (when the target is an aircraft, the flight plan) are It is used as information indicating weather conditions and information indicating the runway length required by the target. Since these pieces of information are pieces of information that have been conventionally used in radar control of airports, no new device is required for acquisition.

Next, in the eighth or ninth aspect of the present invention, information indicating the target approach angle is used as auxiliary information. By using the information indicating the approach angle of the target together with the position and speed of the target at the start of interpolation, which runway is likely to land on the basis of the position and speed of the target at the start of interpolation. Also, you can know where on the runway you are likely to land.
Therefore, by using this information as auxiliary information, the target motion state after entering the interpolation region can be interpolated with higher accuracy by a relatively simple estimation calculation related to constant velocity linear motion or uniform acceleration linear motion. It can be estimated. Furthermore, in the 10th structure of this invention, ASR and / or SSR are carried out.
Since the target altitude is sequentially input and the target altitude change rate is calculated based on the input altitude, information on the approach angle is obtained, so that a new device is not required for acquisition.

Further, in the eleventh configuration of the present invention, an estimation error of the target motion state is obtained based on the target motion state obtained by the estimation and the output of ASDE, and the obtained estimation error is used as auxiliary information. Used. By using this information, it is possible to correct the following estimation process so that the estimation error that has occurred in the estimation so far can be eliminated, so the information indicating the weather conditions at the airport, the target Even if information or the like indicating the required runway length cannot be obtained, the target motion state after entering the interpolation area can be interpolated and estimated with higher accuracy. Further, since the information of the estimation error is the information obtained by the correlation judgment with the ASDE output, for example, no new device is required for acquisition.

In the twelfth configuration of the present invention, the target motion state obtained by PAR is used as auxiliary information. By using this information, AS
The target can be tracked in a region that does not belong to any coverage area of R, SSR, and ASDE.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. It should be noted that the same components as those of the conventional example shown in FIGS.

Example 1. First Embodiment FIG. 1 shows the configuration of a radar signal processing device according to a first embodiment of the present invention. In this embodiment, as the landing runway estimation table, the landing runway estimation table 7 that associates the interpolation start position / travel direction, weather information and flight plan with the landing runway is used. The landing runway estimation unit 8 uses the interpolation start position and the traveling direction obtained via the coverage area determination unit 2 as well as the weather information and the flight plan provided by existing equipment (not shown) or manually to estimate the landing runway. By referring to Table 7, the position of the runway end at which the target is about to land is estimated.

The weather information used in this embodiment is information such as wind direction and wind speed at the airport and its surroundings. In general, when an aircraft is about to land, the runway is selected so that the aircraft receives the headwind and can land. Therefore, on the landing runway estimation table 7, the headwind is received when certain weather information is given. Correspondence between the meteorological information and the landing runway information is performed so that the landing runways can be obtained as a reference result. The flight plan is information indicating the model of the aircraft, and represents the landing runway length required by the aircraft of the model. That is,
An aircraft of a certain type cannot land on a runway shorter than the landing runway length required by the aircraft of that type. Therefore, if a flight plan is given on the landing runway estimation table 7, The flight plan and the landing runway information are associated with each other so that a runway having a length longer than the landing runway length required by the aircraft of the flight plan is obtained as a reference result.

Therefore, in this embodiment, with respect to the target determined to be out of the ASR / SSR coverage by the coverage determination unit 2, the landing gliding is performed using the interpolation start position / direction, the weather information and the flight plan. The landing runway estimation unit 8 refers to the road estimation table 7, and based on the landing runway end obtained as a result, the interpolation calculation unit 5 performs interpolation calculation assuming a uniform linear motion. Therefore, by supplying the output of the interpolation calculation unit 5 to the correlation processing unit 6, more accurate and smoother radar control transfer can be realized as compared with the conventional example.

Embodiment 2 FIG. Second Embodiment FIG. 2 shows the configuration of a radar signal processing device according to a second embodiment of the present invention. In this embodiment, a landing speed estimation table 9 is provided instead of the landing runway estimation table 7, and a landing speed estimation unit 10 is provided instead of the landing runway estimation unit 8. The landing speed estimation table 9 includes the target position and speed (interpolation start position / speed) at the time of leaving the ASR / SSR coverage area,
It is a table that associates weather information and flight plans with estimated values of target landing speeds. The landing speed estimation unit 10
In addition to the interpolation start position / velocity obtained through the coverage area determination unit 2 and the like, weather information, flight plan, and other information provided from an external device or manually are used to refer to the landing velocity estimation table 9 to determine the target. Get an estimate of the landing speed of.
The interpolation calculation unit 5 performs interpolation calculation assuming a uniform acceleration linear motion, with the interpolation start position / speed as an initial value and the estimated landing speed value obtained by the landing speed estimation unit 10 as a final value. As a result, information such as the target position after the ASR / SSR coverage area is removed can be obtained. The correlation processing unit 6 uses the information obtained by the interpolation calculation unit 5 for the correlation processing with the output of ASDE. Therefore, also in this embodiment, similarly to the first embodiment, the radar control can be transferred from ASR / SSR to ASDE more accurately and smoothly than in the conventional case.

Example 3. FIG. 3 shows the configuration of a radar signal processing device according to a third embodiment of the present invention. In this embodiment, the landing runway estimation unit 3 or 8 uses the landing runway estimation table 4 or 7 for the target determined to be outside the ASR / SSR coverage area by the coverage area determination unit 2. Is being estimated. On the other hand, ASR / S
A change in altitude obtained through the tracking processing unit 1 with respect to the target detected by SR is calculated by the altitude change calculation unit 11. The altitude change obtained as a result of the calculation represents the target approach angle to the airport. Landing runway estimation unit 3
Or, the landing position estimation unit 12 provided at the latter stage of 8
The landing position estimation table 13 based on the altitude change obtained by the altitude change calculation unit 11 in addition to the interpolation start position / speed obtained via the coverage determination unit 2 and the landing runway estimation unit 3 or 8.
Then, the position on the landing runway estimated by the landing runway estimation unit 3 or 8 at which the target will land is estimated, and the result is supplied to the interpolation calculation unit 5. Therefore, on the landing position estimation table 13, the interpolation start position / speed and the altitude change are associated with the estimated value of the landing position. The interpolation calculation unit 5 executes interpolation calculation related to constant velocity linear motion or equivalent velocity linear motion with the interpolation start position / speed as an initial value and the estimated value of landing position / speed as a final value, and the result is subjected to correlation processing. Supply to the part 6.

Therefore, according to this embodiment, for example, the interpolation calculation can be performed with higher accuracy than that of the first embodiment and the like, so that the ASR / SSR to AS can be more accurately and smoothly performed.
The transfer of radar control to the DE can be realized. That is, not only is the landing runway estimated, but the position on the runway at which the target is landing is estimated, so that interpolation calculation with higher accuracy than in the first embodiment and the like can be realized.

Embodiment 4 FIG. Fourth Embodiment FIG. 4 shows the configuration of a radar signal processing device according to a fourth embodiment of the present invention. In this embodiment, in addition to combining Embodiments 1 to 3, the estimation database updating unit 14 uses the estimation error obtained by the correlation processing unit 6 so that the landing runway estimation table 4 or 7, the landing position estimation table 13, and In this embodiment, the contents of the landing speed estimation table 9 are updated.

In this embodiment, the area determination unit 2
With respect to the target determined to be out of the SR / SSR coverage area, the landing runway is estimated by the method of the conventional example or the first embodiment,
Using the result and the output of the altitude change calculator 11, the landing position is estimated by the method of the third embodiment, and the landing speed is estimated by the method of the second embodiment. Next, when the interpolation calculation unit 5 performs interpolation calculation based on the results of these estimations, the result is supplied to the correlation processing unit 6.
The estimation database updating unit 14 uses the position deviation and the speed deviation obtained by the correlation processing, that is, the error of the output of the interpolation calculation unit 5 with respect to the output of ASDE, and updates the contents of each estimation table so that the error is suppressed. To do.

By providing such a learning function,
In this embodiment, it is possible to perform interpolation calculation with higher accuracy than in the above-described conventional example and in each of the above-described embodiments, and therefore, the ASR / SRR can be performed more accurately and smoothly.
It becomes possible to carry out the transfer of the radar control from the SR to the SRDE. When using the conventional configuration for the landing runway estimation unit and the landing runway table, it is not necessary to supply weather information and flight plans to the landing runway estimation unit, and the landing runway estimation table It is not necessary to include this information in.

Example 5. FIG. 5 shows the configuration of a radar signal processing device according to the fifth embodiment of the present invention. In this embodiment, the correlation processing unit 15 executes the correlation processing between the target tracked by the tracking processing unit 1 and the target detected by the PAR. Correlation processing unit 1
When it is determined that there is a correlation by 5, the tracking processing is executed by the tracking processing unit 16 based on the output of PAR. The correlation processing unit 6 executes the correlation processing with the target detected by the ASDE for the target tracked by the tracking processing unit 16, and if the correlation is detected as a result, the radar control is transferred to the ASDE. . Therefore, also in this embodiment, ASR / SSR to ASDE are the same as in the above-described embodiments.
The radar control can be transferred accurately and smoothly to.

[0038]

As described above, according to the first and thirteenth configurations of the present invention, the target is ASR and / or SSR.
ASR and / or SSR is set as the target motion state at the time of entering the interpolation region after leaving the coverage area of
On the other hand, input auxiliary information indicating the behavior that the target can take after entering the interpolation area, and use the motion state and auxiliary information at the start of interpolation as the target motion state after entering the interpolation area. Since it was estimated by using ASR, SSR
The target motion state can be estimated with higher accuracy than before even in the interpolation area where the target cannot be detected directly by either ASDE or ASDE. Therefore, the radar control can be transferred from ASR and / or SSR to ASDE more accurately and smoothly. become.

According to the second aspect of the present invention, first, based on the motion state and auxiliary information at the start of interpolation, the runway at which the target is expected to land, the target landing speed and / or the target landing position are determined. Based on the estimated runway, landing speed and / or landing position, and the motion state at the start of interpolation, the target motion state after entering the interpolation area is estimated. The information obtained from the system can be used as auxiliary information, and the present invention can be realized relatively easily and inexpensively.

According to the third configuration of the present invention, in addition, the runway and the like are estimated using the database, and the contents of the database are corrected based on the detected estimation error and so that the estimation error is reduced. Since it is updated, the target motion state can be estimated with higher accuracy.
And / or the radar control can be transferred more accurately and smoothly from SSR to ASDE.

First, according to the fourth or fifth aspect of the present invention, the information indicating the weather conditions at the airport or the information indicating the runway length required by the target is used as auxiliary information, and these information are started to be interpolated. The runway and landing speed are estimated in combination with the target position and speed at the time, and interpolation estimation for constant velocity linear motion or constant acceleration linear motion is performed. The target motion state after entering the area can be interpolated and estimated with high accuracy. Furthermore, according to the sixth or seventh configuration of the present invention, since the weather information indicating the wind direction and the wind speed at the airport or its vicinity and the type information indicating the target type are used, the auxiliary information can be obtained. It is not necessary to provide a new device, and the present invention can be implemented with a small facility load.

Next, according to the eighth or ninth aspect of the present invention, information indicating the target approach angle is used as auxiliary information, and this information is used together with the target position and speed at the start of interpolation. Since the runway and landing position are estimated and interpolation estimation related to constant velocity linear motion or constant acceleration linear motion is performed, the target motion state after entering the interpolation area can be calculated by a relatively simple interpolation estimation calculation. Interpolation can be estimated with higher accuracy. Further, according to the tenth configuration of the present invention, the target altitude is sequentially input from the ASR and / or SSR, and the target altitude change rate is obtained based on the input altitude, so that the information on the approach angle is obtained. Therefore, it is not necessary to provide a new device for acquiring the auxiliary information, and the present invention can be implemented with a small facility load.

Further, according to the eleventh structure of the present invention,
Since the estimation error of the target motion state is calculated based on the target motion state and the output of ASDE obtained by the estimation, and the estimation error is canceled by using the obtained estimation error as auxiliary information, the weather conditions of the airport Even if the information indicating the target information, the information indicating the runway length required by the target, or the like cannot be obtained, the motion state of the target after entering the interpolation region can be estimated with higher accuracy. Further, since the information of the estimation error is the information obtained by the correlation judgment with the ASDE output, for example, no new device is required for acquisition.

According to the twelfth structure of the present invention,
Since the target motion status obtained by PAR is used as auxiliary information, ASR, SSR and ASDE are used.
The target can be tracked even in a region that does not belong to any of the coverage areas, and the transfer of radar control from ASR and / or SSR to ASDE can be performed with high accuracy.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a radar signal processing device according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a radar signal processing device according to a second embodiment of the invention.

FIG. 3 is a block diagram showing a configuration of a radar signal processing device according to a third embodiment of the invention.

FIG. 4 is a block diagram showing a configuration of a radar signal processing device according to a fourth embodiment of the invention.

FIG. 5 is a block diagram showing a configuration of a radar signal processing device according to a fifth embodiment of the invention.

FIG. 6 is a conceptual diagram showing a relationship between an ASR / SSR coverage area and an ASDE coverage area.

FIG. 7 is a block diagram showing a configuration of a radar signal processing device according to a conventional example.

[Explanation of symbols]

1,16 Tracking processing unit, 2 Coverage determination unit, 3,8 Landing runway estimation unit, 4,7 Landing runway estimation table, 5 Interpolation calculation unit, 6,15 Correlation processing unit, 9 Landing speed estimation table, 10 Landing speed estimation unit, 11 altitude change calculation unit, 12 landing position estimation unit, 13 landing position estimation table, 14 estimation database updating unit.

Claims (13)

[Claims] 1. From the coverage area of an airport surveillance radar and / or a secondary surveillance radar set around an airport, the airport surveillance radar,
Regarding the target to enter the coverage area of the airport surveillance radar covering the runway through an interpolation area that is neither the coverage of the secondary surveillance radar nor the airport surveillance radar, the airport surveillance radar and / or the secondary surveillance radar In the radar control transfer method that transfers radar control to the surface monitoring radar, the target motion state when exiting the coverage area of the airport surveillance radar and / or the secondary surveillance radar and entering the interpolation area is the motion state at the start of interpolation. As the first step of inputting from the airport surveillance radar and / or the secondary surveillance radar, the second step of inputting auxiliary information indicating the behavior that the target can take after entering the interpolation area, and the movement at the start of interpolation The third step of estimating the target motion state after entering the interpolation area based on the state and auxiliary information, and the target motion state obtained by the estimation and the output of the airport surface surveillance radar. If a correlation is found between the two, it is considered that the target has exited the interpolation area and entered the coverage area of the airport surveillance radar, and the radar control is transferred from the airport surveillance radar and / or the secondary surveillance radar to the airport surveillance radar. And a fourth step of performing a radar control transfer method. 2. The radar control transfer method according to claim 1, wherein the third step is based on the motion state and auxiliary information at the start of interpolation, the runway at which the target seems to land, the target landing speed, and / or the target landing speed. A step of obtaining a target landing position, and a step of estimating a target motion state after entering the interpolation area based on the obtained runway, landing speed and / or landing position and a motion state at the start of interpolation A radar control transfer method characterized by the above. 3. The radar control transfer method according to claim 2, wherein a database associating the motion state and auxiliary information at the start of interpolation with the runway, landing speed and / or landing position is stored in the database. By referring to the information, the runway, landing speed and / or landing position are obtained, and the target motion state estimation error is detected based on the target motion state obtained by the estimation and the output of the airport surface monitoring radar, A radar control transfer method comprising modifying and updating the contents of the database so that the estimation error is reduced based on the detected estimation error. 4. The radar control transfer method according to claim 2, wherein at least a target position is set as a motion state at the start of interpolation,
Input the information indicating the weather conditions of the airport and / or the runway length required by the target as auxiliary information, and calculate the runway at which the target is expected to land based on the motion state at the start of interpolation and the auxiliary information. A radar control transfer method characterized by estimating the motion state of a target after entering the interpolation region, based on the runway and the motion state at the start of interpolation and assuming that the target moves at a constant linear velocity. 5. The radar control transfer method according to claim 2, wherein at least the position and speed of the target are shown as the motion state at the start of interpolation, and the weather conditions of the airport and / or the runway length required by the target are shown as auxiliary information. Input the respective information, calculate the target landing speed based on the motion state at the start of interpolation and auxiliary information, and based on the obtained landing speed and the motion state at the start of interpolation and assuming that the target is a uniform acceleration linear motion, A radar control transfer method characterized by estimating a target motion state after entering an interpolation area. 6. The radar control transfer method according to claim 4, wherein the auxiliary information includes meteorological information indicating a wind direction and / or a wind speed at or around the airport, as information indicating weather conditions at the airport. Radar control transfer method. 7. The radar control transfer method according to claim 4 or 5, wherein the auxiliary information includes type information indicating a target type as information indicating a runway length required by the target. Transfer method. 8. The radar control transfer method according to claim 2, wherein at least a target position is set as a motion state at the start of interpolation,
The information indicating the approach angle of the target was input as auxiliary information, and the runway at which the target would land and the landing position of the target on the runway were calculated based on the motion state at the start of interpolation and the auxiliary information. A radar control transfer method characterized by estimating a motion state of a target after entering an interpolation region, based on a runway and a landing position and assuming that the target moves at a uniform linear velocity. 9. The radar control transfer method according to claim 2, wherein at least a target position and velocity are used as a motion state at the start of interpolation, and information indicating a target approach angle is used as auxiliary information.
The runway at which the target is supposed to land and the target landing position on the runway are calculated based on the motion state and auxiliary information at the start of interpolation, and based on the calculated runway and landing position and the target has uniform acceleration. A radar control transfer method, characterized in that a target motion state after entering an interpolation region is estimated on the assumption that the object moves linearly. 10. The radar control transfer method according to claim 8 or 9, wherein the airport surveillance radar and / or the secondary surveillance radar is removed from the airport surveillance radar and / or the secondary surveillance radar before entering the interpolation area. The radar control transfer method is characterized in that the target altitude is sequentially input from, the target altitude change rate is calculated based on the input altitude, and the calculated altitude change rate is used as information indicating the target approach angle. 11. The radar control transfer method according to claim 1, further comprising a fifth step of detecting an estimation error of the target motion state based on the target motion state obtained by the estimation and the output of the airport surface monitoring radar. Then, the radar control transfer method is characterized in that the detected estimation error is input as auxiliary information. 12. The radar control transfer method according to claim 1, wherein the target motion state obtained by the precision approach radar is input as auxiliary information. 13. An interpolation area where the target is out of the coverage area of the airport surveillance radar and / or the secondary surveillance radar set around the airport and is not the coverage area of any of the airport surveillance radar, the secondary surveillance radar and the airport surface surveillance radar. The means for detecting entry into the airport surveillance radar and / or the secondary surveillance radar is set as the motion state at the start of interpolation, which is the target motion state when leaving the coverage area and entering the interpolation area. Or a means to input from the secondary surveillance radar, a means to input auxiliary information indicating the behavior that the target can take after entering the interpolation area, and a method to enter the interpolation area based on the motion state and auxiliary information at the start of interpolation If a correlation is found between the means for estimating the target's motion state and the target's motion state obtained by the estimation and the output of the airport surface surveillance radar, the target exits the interpolation area and the airport surface surveillance radar's Considered to have entered the band, the radar signal processing apparatus, characterized in that it comprises from airport surveillance radar and / or secondary surveillance radar to airport surface surveillance radar and means for transferring the radar control, the.