JP2002243852A - Radar system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that the conventional radar displays single polarized ISAR (high resolution image process) images on an operating indicator and hence cannot express but information of the range, Doppler and echo intensity only to result in a low discrimination accuracy for the target discrimination by imaging the target of an original purpose of ISAR. SOLUTION: An antenna control/polarization switch 70 changes over vertically/horizontally polarized waves every transmission of radar pulses and they are transmitted and received. A vertically and horizontally polarized ISAR images 98V, 98H are obtained and displayed in cascade on one screen. Owing to this screen, the relation of the echo intensity distribution in the range direction to a Doppler frequency can be seen at a glance to improve the discrimination accuracy of a target by the ISAR.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION The present invention provides a high-resolution radar
The present invention relates to an apparatus and a screen display method thereof.

[0002]

2. Description of the Related Art As one of conventional radar devices, there is a high-resolution radar for capturing details of an object as an image. Inverse Synthetic Aperture Rada is a typical high-resolution radar.
r: ISAR). ISAR will be described. FIG. 12 is a basic configuration diagram of a conventional ISAR.
In the figure, 4 is a receiver that generates a transmission seed signal, 1 is a transmitter that amplifies the output of the receiver 4 and generates a transmission signal, and 2 is a device that supplies the output of the transmitter 1 to the antenna 3 and outputs the signal from the antenna 3 A circulator that supplies a reception signal to the receiver 4. Reference numeral 5 denotes an ISAR processing unit 5d for performing high-resolution processing (ISAR processing) based on the output of the receiver 4, a tracking processing unit 5b for tracking a target, a beam control unit 5a for calculating an antenna beam direction, and a display processing for processing display data. Part 5
c is a signal processor. Reference numeral 6 denotes an operation display which displays a target high-resolution image based on the output of the signal processor 5 and is operated by an operator. Reference numeral 7 denotes an antenna controller which controls an antenna beam azimuth by an angle signal output from the signal processor 5. is there. Here, the polarization of a series of transmission and reception signals is a single polarization.

Next, the operation will be described. The transmission seed signal generated by the receiver 4 is amplified by the transmitter 1 and is amplified by a high-frequency signal (RF
Signal). The RF signal is radiated from the antenna 3 to the free space via the circulator 2. Then, the emitted signal is reflected from a target (not shown). The reflected echo received by the antenna 3 is input to the receiver 4 via the circulator 2. Reflected echo is receiver 4
After the pulse compression is performed in order to increase the resolution in the range direction (distance direction from the antenna 3), the A / D converted digital radar video is obtained. The radar video is quantized and stored in a range cell divided according to the distance from the radar.

On the other hand, the ISAR achieves high resolution in a cross range direction (a direction orthogonal to the range direction) by performing synthesis on an aperture surface. A target image signal is generated by the ISAR processing unit 5d by increasing the resolution in the cross range direction by the ISAR processing and increasing the resolution in the range direction by the above-described pulse compression. The display processing unit 5c converts the image signal into a display signal and outputs the display signal to the operation display unit 6. The tracking processing unit 5b detects a target from the radar video, performs tracking calculation processing using a tracking filter, and calculates the azimuth of the target AZ (azimuth angle) and EL (elevation angle). In the beam controller 5a, the tracking processor 5b
AZ and EL target azimuth calculated by the above and antenna controller 7
A beam control signal is generated based on the angle signal from.

Next, the positional relationship between the target and the radar and the form of the image will be described with reference to an example in which the target is a ship. FIG.
As shown in, the start time of the distance R ₀ of the synthetic aperture to synthetic aperture end R _E, if the ship target approaches the radar,
The near range of the radar is the bow, the far range is the stern, and the ISAR images 98,.
15b) A range profile 99 as shown in the figure is generated and displayed on the operation display unit 6. Here, in the two-dimensional display 98 of the ISAR image, the range information after the ISAR processing is displayed in the horizontal direction, and the Doppler information is displayed in the vertical direction.
In the two-dimensional display 99 of the range profile,
The range information of the radar reception signal is displayed in the horizontal direction, and the intensity information is displayed in the vertical direction. An optical image corresponding to the display form of the range profile and the ISAR image (the bow and stern direction) is as shown in FIG. 15C.

Here, the contents of the ISAR processing will be described with reference to the flowchart of FIG. The ISAR processing unit 5d tracks the target of the radar video data based on the distance / amplitude information of the data on the time axis, and calculates the moving amount of each pulse hit in the range cell unit as the distance compensation amount. With this amount of distance compensation, the distance deviation due to the movement of the target is distance compensated for the radar video in units of range cells. As a result, it is possible to treat the target as if it were stationary.
Next, autofocus is performed on the frequency axis based on the time / frequency information, a target Doppler frequency based on the tracking speed, and a phase amount obtained by integrating the Doppler frequency are calculated as a phase compensation amount.
Based on the amount of phase compensation, the Doppler shift due to the movement of the target is compensated for the radar video data by complex multiplication. The FFT is performed on the compensated radar video data to discriminate the target fluctuation (roll, pitch, yaw frequency) components. Then, the amplitude of the signal is detected and an image signal is generated /
Output.

The image processing unit 5d converts and outputs the image signal to a display signal that matches the resolution of the operation display unit 6, the display luminance dynamic range, the operation information, and the like. For an ISAR image, range information is displayed in the horizontal direction, Doppler information is displayed in the vertical direction, and reflection intensity is displayed as luminance. Further, the antenna controller 7 generates an antenna drive signal from the beam control signal from the signal processor 5 and the angle signal from the antenna 3 to control the antenna.

[0008]

The conventional radar apparatus is constructed as described above, and can express only information of the range, Doppler and reflection intensity, and identifies the target by imaging the target, which is the original purpose of the ISAR. However, there is a problem that the identification accuracy is low when performing the method.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has as its object to provide a radar apparatus with improved identification accuracy and an image display method with improved identification angle.

[0010]

SUMMARY OF THE INVENTION A radar apparatus according to the present invention includes a transmitter for generating a transmission signal, radiating the transmission signal by arbitrarily controlling its polarization plane, and transmitting the transmission signal from a radiated target. An antenna for receiving the reflected signal of the wavefront, a receiver for processing the reflected signal and generating a video signal corresponding to the polarization plane, a tracking processing unit for tracking the target based on the received signal and outputting tracking information, and based on the tracking information A signal processing unit that calculates a target direction, a signal processor that performs a synthetic aperture process using tracking information on each of the video signals corresponding to the polarization plane, and generates a radar image signal corresponding to the polarization plane, a polarization plane And an operation display for displaying a radar image signal corresponding to the above on a single display surface, and a polarization switch for controlling the angle of the polarization plane of the transmission signal and the reception signal.

[0011] The polarization plane is two orthogonal polarization planes.

The plane of polarization is a vertically polarized wave and a horizontally polarized wave.

The radar image signal generated by the signal processor includes a radar image based on the amplitude of the received signal and a range profile obtained by integrating amplitude values for the synthetic aperture time.

The vertically polarized radar image and the horizontally polarized radar image displayed on the operation display are arranged vertically one above the other on one screen.

The vertically polarized radar image and the horizontally polarized radar image displayed on the operation display are displayed horizontally on a single screen.

The vertically polarized radar image and the horizontally polarized radar image displayed on the operation display are superimposed on one screen.

The vertical polarization range profile and the horizontal polarization range profile displayed on the operation display are displayed in a vertical line on one screen.

The vertical polarization range profile and the horizontal polarization range profile displayed on the operation display are displayed horizontally on one screen.

The vertical polarization range profile and the horizontal polarization range profile displayed on the operation display are superimposed on one screen.

The vertically polarized radar image and range profile, and the horizontally polarized radar image and range profile are displayed in tandem on one screen.

Also, the vertically polarized radar image and the range profile are displayed in tandem on one screen, and the horizontally polarized radar image and the range profile are displayed in tandem on one screen. And the horizontally polarized radar image are displayed horizontally.

Also, the vertically polarized radar image and the range profile are displayed in tandem on one screen, and the horizontally polarized radar image and the range profile are displayed in tandem on one screen. The horizontal polarization radar image and the vertical polarization range profile and the horizontal polarization range profile are superimposed on each other.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Hereinafter, the configuration of the radar apparatus according to Embodiment 1 of the present invention will be described with reference to FIG. In the figure, 4 is a receiver for generating a transmission seed signal, 1 is a transmitter for amplifying the output of the receiver 4 to generate a transmission signal, and 2 is supplying the output of the transmitter 1 to the antenna 30 and Is a circulator that supplies a reception signal from the receiver 4 to the receiver 4. Here, the antenna 30 transmits,
It has a function that can arbitrarily switch the polarization plane of the received radio wave.

Reference numeral 5 denotes an ISAR for a vertically polarized reception signal that performs high resolution processing (ISAR processing) based on the output of the receiver 4.
Processing unit 5eV, ISAR processing unit 5e for horizontal polarization reception signal
H, a signal processor including a tracking processing unit 5b for tracking a target, a beam control unit 5a for calculating an antenna beam direction, and a display processing unit 5c for processing display data. Reference numeral 6 denotes a target high-resolution image based on the output of the signal processor 5, and an operation display operated by an operator. Reference numeral 70 denotes an antenna beam direction and transmission / reception based on an angle signal and a polarization switching signal output from the signal processor 5. An antenna control / polarization switch for controlling the plane of polarization of radio waves.

Next, the operation will be described. The transmission seed signal generated by the receiver 4 is amplified by the transmitter 1 and a high-frequency signal (R
F signal). The RF signal is radiated from the antenna 3 to free space via the circulator 2 by the polarization controlled by the antenna control / polarization switch 7. Then, the emitted signal is reflected from a target (not shown).
The reflected echo received by the antenna 3 is input to the receiver 4 via the circulator 2. The reflected echo is pulse-compressed at the receiver 4 after the receiver 4 has been subjected to pulse compression in order to increase the resolution in the range direction (distance direction from the antenna 3).
A / D converted digital radar video is obtained. The radar video is quantized and stored in a range cell divided according to the distance from the radar. Here, it is assumed that the transmission and reception polarization planes are switched at an arbitrary cycle (for example, for each transmission pulse) during transmission.

On the other hand, the ISAR achieves high resolution in the cross range direction (direction orthogonal to the range direction) by performing synthesis on the aperture surface. By increasing the resolution in the cross-range direction by the ISAR process and increasing the resolution in the range direction by the above-described pulse compression, the ISAR processing unit 5eV receives a plurality of arbitrary pulses and collects a vertically polarized reception signal. The ISAR processing unit 5eH generates a target ISAR image signal with respect to the horizontally polarized reception signal obtained by receiving and combining a plurality of arbitrary pulses. The display processing unit 5cHV converts the image signal into a display signal and outputs it to the operation display unit 6. The tracking processing unit 5b detects the target from the radar video, performs tracking calculation processing using a tracking filter, and calculates the azimuths of the target AZ and EL. The beam control unit 5a generates a beam control signal from the target directions of AZ and EL calculated by the tracking processing unit 5b and an angle signal from the antenna controller, and further generates a polarization switching signal for switching the polarization at an arbitrary cycle. Generate

Next, the positional relationship between the target and the radar and the form of the image will be described. As shown in FIG. 14 described conventional example for from the start time of the distance R ₀ of the synthetic aperture to synthetic aperture end R _E, when the target (using a diagram of the ship as an example) approaches the radar, radar near The range is the bow and the far range is the stern. An ISAR image as shown in FIG. 15 a) is generated and displayed on the operation display unit 6. Here, in the ISAR image, the range information after the ISAR processing is displayed in the horizontal direction, and the Doppler information is displayed in the vertical direction. The optical image corresponding to the display mode of the ISAR image (the bow and stern direction) is as shown in FIG.

Here, the contents of the ISAR process will be described with reference to the flowchart of FIG. The ISAR processing units 5eV and 5eH track the target with respect to the radar video data on the time axis based on the distance / amplitude information of the data, and calculate the amount of movement in units of range cells for each pulse hit as the distance compensation amount (step S31). . Based on the distance compensation amount, the deviation of the distance due to the movement of the target is distance compensated for the radar video in units of range cells (step S32). As a result, the target can be treated as if it were stationary. Next, autofocus is performed on the frequency axis based on the time / frequency information (step S33), and the target Doppler frequency and the Doppler frequency are integrated based on the tracking speed to calculate a phase amount as a phase compensation amount. .

Based on the phase compensation amount, the Doppler shift due to the movement of the target is compensated for the radar video data by complex multiplication (step S34). FFT is performed on the compensated radar video data to discriminate the target fluctuation (roll, pitch, yaw frequency) components (step S3).
5). Then, the signal amplitude is detected, and an ISAR image signal is generated and output (step S36). Further, an image signal of a range profile is generated by integrating the amplitude values in the same range direction for one synthetic aperture time. Display processing unit 5cHV
In this example, the two images are arranged so that the actual lengths of the two image signals are aligned with each other so as to be displayed side by side, and converted and output into a display signal that matches the resolution of the operation display unit 6, the display luminance dynamic range, the operation information, and the like. In the operation display unit 6, as shown in FIG.
For example, an ISAR image 98V based on vertical polarization is arranged on the upper side, and an ISAR image 98H based on horizontal polarization is arranged on the lower side. At this time, the ISAR image displays range information in the horizontal direction, Doppler information in the vertical direction, and reflection intensity as luminance. With this display mode, the relationship between the reflection intensity distribution in the range direction and the Doppler frequency becomes clear. Further, the antenna control / polarization switch 70 generates an antenna drive signal from the beam control signal and the polarization switch signal from the signal processor 5 and the angle signal from the antenna 30, and controls the antenna 30 and the polarization plane. . In the above description, the polarization plane may be switched every transmission pulse or every plural pulses. Further, the number of pulses of vertical / horizontal polarization transmitted within a unit time may be changed according to the situation. An ISAR image is a radar image referred to in the present invention.

Embodiment 2 FIG. Another display method of the ISAR image 98V based on the vertical polarization and the ISAR image 98H based on the horizontal polarization will be described. The display processing unit 5cHV adjusts the height position of the image signals of both polarizations on the screen at the Doppler frequency of 0, adjusts the position in the vertical direction, and generates an image signal for displaying both images in a row. As a result, as shown in FIG.
The ISAR image 98H due to horizontal polarization is displayed in a row, and the relationship between the reflection intensity distributions in the Doppler direction becomes extremely clear when the relationship is ignored.

Embodiment 3 Another display method of the ISAR image 98V based on the vertical polarization and the ISAR image 98H based on the horizontal polarization will be described. The display processing unit 5cHV adjusts the actual lengths of the image signals of both polarizations, arranges both images so as to be superimposed, and generates an image signal. as a result,
As shown in FIG. 5 (in FIG. 5, the two screens are slightly shifted for convenience of explanation, but in the above-mentioned purpose, the two images are exactly overlapped). The ISAR image 98H due to the polarization is superimposed and displayed, and the relationship between the reflection intensity distribution in the range direction and the Doppler frequency can be recognized very clearly when looking at the screen.

Embodiment 4 FIG. Another display method of the range profile 99V based on the vertical polarization and the range profile 99H based on the horizontal polarization will be described. The high resolution processing is performed in each of the ISAR processing units 5eV and 5eH, and the generated range profiles are arranged in a 5cHV display processing unit so that the actual lengths of the two range profiles are matched, and the range signals are arranged in a column display. Generate. As a result, as shown in FIG. 6, a range profile 99V based on vertical polarization and a range profile 99H based on horizontal polarization are displayed in tandem, and the relationship between the reflection intensity distributions in the range direction can be recognized very clearly when looking at the screen.

Embodiment 5 FIG. Range profile 99V by vertical polarization and range profile 9 by horizontal polarization
Another display method of 9H will be described. In the display processing unit 5cHV, the height positions on the screen of the reflection intensity 0 of the two polarization range profiles are adjusted in the vertical direction in the display processing unit 5cHV. Position adjustment is performed to generate an image signal for displaying both images in a row. As a result, FIG.
As shown in the figure, the range profile by vertical polarization 99V
Then, the range profile 99H by horizontal polarization is displayed in a row, and the relationship between the reflection intensity distributions in the range direction becomes clear.

Embodiment 6 FIG. Another method of displaying the ISAR image 98V based on the vertical polarization and the ISAR image 98H based on the horizontal polarization and the respective range profiles will be described. An image signal in which both the ISAR image and the range profile that are each subjected to high-resolution processing in the ISAR processing units 5eV and 5eH are arranged in the display processing unit 5cHV so as to match the actual length on the screen and to be superimposed. Generate As a result, as shown in FIG. 9 (in FIG. 9, the two are shifted for convenience of explanation), the ISAR image 98V by vertical polarization and the range profile 99V,
In addition, the ISAR image 98H and the range profile 99H due to the horizontal polarization are displayed in tandem, and the relationship between the reflection intensity distributions in the range direction becomes clear.

Embodiment 7 FIG. Another method of displaying an ISAR image and a range profile based on vertical polarization and horizontal polarization will be described. The ISAR images and the range profile generated and processed by the ISAR processing units 5eV and 5eH, respectively, are combined in the display processing unit 5cHV. Generate the arranged image signal. As a result, as shown in FIG.
Then, the ISAR image 98H and the range profile 99H due to the horizontal polarization are displayed in tandem, and the relationship between the reflection intensity distribution in the range direction and the Doppler frequency becomes clear.

Embodiment 8 FIG. Another method of displaying an ISAR image and a range profile using vertically polarized waves and horizontally polarized waves will be described. The ISAR image and the range profile that are respectively subjected to high resolution processing by the ISAR processing units 5eV and 5eH are displayed on the screen of the Doppler frequency 0 and the reflection intensity 0 of the ISAR image and the range profile of both polarizations by the display processing unit 5cHV. Are adjusted in the vertical direction, and an image signal for displaying both images in a row is generated. As a result, as shown in FIG. 10, the ISAR image 98V and the range profile 99V by the vertical polarization and the ISAR image 98 by the horizontal polarization
H and the range profile 99H are displayed in a row, and the relationship between the reflection intensity distribution in the Doppler direction and the reflection intensity in the range direction becomes clear.

Embodiment 9 Another method of displaying an ISAR image and a range profile using vertically polarized waves and horizontally polarized waves will be described. The ISAR image processing unit 5eV and 5eH perform high-resolution processing, respectively, and generate an image signal in which the generated ISAR image and the range profile are arranged in the display processing unit 5cHV so as to match the actual length and superimpose the two images. . As a result, as shown in FIG.
Then, for the sake of explanation, both images are slightly shifted.)
The ISAR image 98V and the range profile 99V due to the vertical polarization and the ISAR image 98H and the range profile 99H due to the horizontal polarization are displayed in tandem, and the relationship between the reflection intensity distribution in the range direction and the Doppler frequency becomes clear.

[0038]

As described above, the radar apparatus according to the present invention includes the antenna capable of controlling the polarization plane of the transmission / reception radio wave,
Since the synthetic aperture processing is performed for each polarization plane and the obtained image for each polarization plane is displayed on one screen, the relationship between the reflection intensity distribution in the range direction and the Doppler frequency becomes clear,
The accuracy of target identification is improved.

Since the two planes of polarization are two planes orthogonal to each other, the characteristics of the received signal on both planes of polarization are clearly obtained, and the accuracy of target identification is improved.

Further, since the two polarization planes are a vertical polarization plane and a horizontal polarization plane, the characteristics of both are clearly obtained, and the accuracy of identifying the target is improved.

Further, since the radar image signal has a range profile with the radar image, the relationship between the reflection intensity distribution in the range direction and the Doppler frequency becomes clear, and the accuracy of target identification is improved.

Further, by displaying the radar images of both polarizations in tandem, the relationship between the reflection intensity distribution in the range direction and the Doppler frequency becomes clear, and the accuracy of target identification is improved.

Further, the relationship between the reflection intensity distributions in the Doppler direction is clarified by the row display of the radar images of both polarizations.
The accuracy of target identification is improved.

Further, by superimposing and displaying radar images of both polarizations, the relationship between the reflection intensity distribution in the range direction and the Doppler frequency becomes clear, and the accuracy of target identification is improved.

In addition, the relationship between the reflection intensity distributions in the range direction is clarified by displaying the range profiles of the two polarizations in tandem, and the accuracy of target identification is improved.

Further, the relationship between the reflection intensity distributions in the range direction is clarified by the horizontal display of the range profiles of both polarizations, and the accuracy of target identification is improved.

Further, by superimposing and displaying the range profiles of the two polarizations, the relationship between the reflection intensity distributions in the range direction becomes clear, and the accuracy of target identification is improved.

Further, the relationship between the reflection intensity distribution in the range direction and the Doppler frequency is clarified by displaying the radar images of both polarizations and the tandem display of the range profile, and the identification accuracy of the target is improved.

Further, the relationship between the reflection intensity distribution in the Doppler direction and the Doppler frequency becomes clear by displaying the radar image and the range profile of both polarizations in a row, and the accuracy of identifying the target is improved.

Further, the relationship between the reflection intensity distribution in the range direction and the Doppler frequency is clarified by the superimposed display of the radar image and the range profile of both polarizations, and the identification accuracy of the target is improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a radar device according to the present invention.

FIG. 2 is an explanatory diagram of an image display of a radar image of the radar device of FIG. 1;

FIG. 3 is a flowchart showing an operation flow of a part of the configuration of the radar apparatus of FIG. 1;

FIG. 4 is an explanatory diagram of an image display according to the second embodiment.

FIG. 5 is an explanatory diagram of an image display according to a third embodiment.

FIG. 6 is an explanatory diagram of an image display according to the fourth embodiment.

FIG. 7 is an explanatory diagram of an image display according to the fifth embodiment.

FIG. 8 is an explanatory diagram of an image display according to a sixth embodiment.

FIG. 9 is an explanatory diagram of an image display according to the seventh embodiment.

FIG. 10 is an explanatory diagram of an image display according to the eighth embodiment.

FIG. 11 is an explanatory diagram of an image display according to the ninth embodiment.

FIG. 12 is a configuration diagram of a conventional radar device.

FIG. 13 is an explanatory diagram of a conventional radar image display.

FIG. 14 is an explanatory diagram of a positional relationship between a target and radar.

FIG. 15 is an explanatory diagram of a target radar image.

FIG. 16 is a flowchart illustrating a partial processing flow of the configuration in FIG. 12;

[Explanation of symbols]

1 transmitter, 2 circulator, 3 antenna,
4 receiver, 5 signal processor, 5a beam controller, 5b tracking processor, 5c display processor (vertical /
Horizontal polarization), 5eV ISAR processing unit (vertical polarization),
5eH ISAR processing unit (horizontal polarization), 6 operation display, 7 antenna control / polarization switch.

Claims (13)

[Claims] 1. A transmitter for generating a transmission signal, radiating the transmission signal by switching its polarization plane according to a command, and receiving a reflection signal of the polarization plane from a target from which the transmission signal is radiated. An antenna, a receiver that processes the reflected signal to generate a video signal corresponding to the polarization plane, a tracking processing unit that tracks the target based on the received signal and outputs tracking information, a target direction based on the tracking information A signal processing unit for calculating a video signal corresponding to each of the switched polarization planes, performing a synthetic aperture process using the target direction information, and generating a radar image corresponding to each of the switched polarization planes. A signal processor that generates a signal; an operation display that displays a radar image signal corresponding to the switched polarization plane on one display surface; No. radar apparatus characterized by comprising a polarization switch for controlling the angle of the polarization plane of the received signal. 2. The radar apparatus according to claim 1, wherein the plane of polarization is two orthogonal planes. 3. The radar apparatus according to claim 2, wherein the polarization is vertical polarization and horizontal polarization, and the polarization switch switches the polarization plane every transmission pulse. 4. The radar image signal generated by the signal processor according to claim 3, wherein the radar image signal includes a radar image based on the amplitude of the received signal and a range profile obtained by integrating amplitude values for a synthetic aperture time. Radar equipment. 5. The radar apparatus according to claim 3, wherein the vertically polarized radar image and the horizontally polarized radar image displayed on the operation display are arranged vertically one above the other on one screen. Radar equipment. 6. The radar according to claim 3, wherein the vertically-polarized radar image and the horizontally-polarized radar image displayed on the operation display are horizontally displayed on one screen. apparatus. 7. The radar apparatus according to claim 3, wherein the vertically polarized radar image and the horizontally polarized radar image displayed on the operation display are superimposed and displayed on one screen. . 8. The radar apparatus according to claim 4, wherein the vertical polarization range profile and the horizontal polarization range profile displayed on the operation display are displayed in tandem on one screen. 9. The radar apparatus according to claim 4, wherein the vertical polarization range profile and the horizontal polarization range profile displayed on the operation display are displayed in a row on one screen. . 10. The range profile of the vertical polarization and the range profile of the horizontal polarization displayed on the operation display are:
5. The radar apparatus according to claim 4, wherein the radar apparatuses are superimposed on one screen. 11. The radar apparatus according to claim 4, wherein the vertically polarized radar image and the range profile and the horizontally polarized radar image and the range profile are displayed in tandem on one screen. 12. A vertically polarized radar image and a range profile are displayed in tandem on one screen, and a horizontally polarized radar image and a range profile are displayed in tandem on one screen. The radar apparatus according to claim 4, wherein the radar image of the wave and the radar image of the horizontal polarization are displayed in a row. 13. A vertically polarized radar image and a range profile are displayed vertically on one screen, and a horizontally polarized radar image and a range profile are displayed vertically on one screen. 5. The radar apparatus according to claim 4, wherein the radar image of the horizontal polarization and the range image of the vertical polarization and the range profile of the horizontal polarization are superimposed on each other.