An Analysis System for Synthetic Aperture Radar Detection Capability

Abstract

The present invention discloses a synthetic aperture radar (SAR) detection capability analysis system, belonging to the field of SAR imaging technology. This system addresses the existing problem of being unable to fully analyze and visualize the detection capability of SAR. The system includes a grid point coordinate matrix acquisition unit, a slant angle matrix and slant range matrix acquisition unit, an antenna-to-grid point actual transmission gain matrix and an antenna-to-grid point actual reception gain matrix acquisition unit, a range resolution acquisition unit, an azimuth resolution acquisition unit, a ground reflection coefficient acquisition unit, a threshold comparison unit, and a graphical display unit. The system can be used to analyze the detection capability of SAR.

Description

Technical Field

[0001] The present invention belongs to the technical field of synthetic aperture radar, and in particular relates to an analysis system for the detection capability of synthetic aperture radar. Background Art

[0002] As the requirements for high-precision detection gradually increase, it is necessary to examine the coupling of various radar parameters and the capability boundaries before the radar performs detection.

[0003] However, for synthetic aperture radar, its detection parameters are numerous and the coupling relationships are complex. It is currently impossible to fully analyze and visualize the detection capabilities of synthetic aperture radar. Summary of the Invention

[0004] In view of the above analysis, the present invention aims to provide a synthetic aperture radar detection capability analysis system to solve the problem in the prior art that the detection capability of the synthetic aperture radar cannot be fully analyzed and visualized.

[0005] The purpose of the present invention is mainly achieved through the following technical solutions:

[0006] The present invention provides an analysis system for the detection capability of a synthetic aperture radar, comprising a grid point coordinate matrix acquisition unit, a slant angle matrix and a slant range matrix acquisition unit, an actual transmission gain matrix from an antenna to a grid point, and an actual reception gain matrix from an antenna to a grid point, an acquisition unit for a distance resolution acquisition unit, an azimuth resolution acquisition unit, a ground reflection coefficient acquisition unit, a threshold comparison unit, and an image display unit; the slant angle matrix and the slant range matrix are used to receive a grid point coordinate matrix and calculate the slant angle matrix and the slant range matrix corresponding to the grid points within the beam coverage range; the ground reflection coefficient matrix acquisition unit is used to receive the actual transmission gain matrix from the antenna to the grid point, the actual reception gain matrix from the antenna to the grid point, and the ground reflection coefficient matrix acquisition unit. The gain matrix, the slant angle matrix and the slant range matrix are received and the ground reflection coefficient matrix of the grid points at different distance resolutions is calculated; the range resolution acquisition unit is used to receive the slant range matrix and calculate the range resolution matrix of the grid points; the azimuth resolution acquisition unit is used to receive the slant angle matrix and the slant range matrix and calculate the azimuth resolution matrix of the grid points; the threshold comparison unit is used to receive the range resolution matrix, the azimuth resolution matrix and the ground reflection coefficient matrix respectively and compare them with the threshold range stored in the threshold comparison unit, obtain multiple grid points that simultaneously meet the range resolution, azimuth resolution and ground reflection coefficient, and send them to the graphical display unit to display a two-dimensional analysis diagram of the synthetic aperture radar detection capability.

[0007] Furthermore, the size of the grid points is 500-1000 m.

[0008] Furthermore, system loss includes waveform loss or transmission loss.

[0009] Furthermore, a distortion rate acquisition unit is also included.

[0010] Furthermore, the threshold comparison unit receives the distortion rate and compares the distortion rates corresponding to multiple grid points that simultaneously meet the distance resolution, azimuth resolution and ground reflection coefficient with the threshold stored in the threshold comparison unit, and obtains multiple grid points that simultaneously meet the distance resolution, azimuth resolution, ground reflection coefficient and distortion rate and sends them to the graphical display unit to display a two-dimensional analysis graph.

[0011] Furthermore, it also includes a memory for storing a grid point coordinate matrix acquisition unit, a slant angle matrix and a slant range matrix acquisition unit, an antenna to grid point actual transmission gain matrix and an antenna to grid point actual reception gain matrix acquisition unit, a distance resolution acquisition unit, an azimuth resolution acquisition unit, a ground reflection coefficient acquisition unit, a threshold comparison unit, and a graphical display unit.

[0012] Furthermore, the memory is a chip.

[0013] Furthermore, it also includes a shell, and the memory is arranged in the shell.

[0014] Furthermore, a buffer is included, and the memory is connected to the shell through the buffer.

[0015] Furthermore, the memory is detachably connected to the housing via a buffer.

[0016] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0017] The synthetic aperture radar detection capability analysis system provided by the present invention comprehensively calculates and screens indicators such as range resolution, azimuth resolution, and ground reflection coefficient, which were previously calculated separately, to meet the needs of synthetic aperture radar detection capability analysis. It presents the radar capability boundary in multiple dimensions through two-dimensional images, maps the position, three-dimensional velocity, and three-dimensional posture of the carrier to multiple dimensions such as the synthetic aperture radar's effective range, slant angle, and off-axis angle, and presents the distribution characteristics of the resolution within the ground beam coverage range. This realizes the fine visualization of the coupling relationship between various synthetic aperture radar detection parameters and the detection boundary, providing systematic support for radar solution design.

[0018] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are only for the purpose of illustrating particular embodiments and are not to be considered limiting of the present invention. Like reference symbols denote like parts throughout the drawings.

[0020] Figure 1 A schematic diagram of the connection between the memory and the housing in the synthetic aperture radar detection capability analysis system provided in the first embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the connection between the first arc rod and the connecting rod in the synthetic aperture radar detection capability analysis system provided in Example 1 of the present invention.

[0022] Reference numerals:

[0023] 1-housing; 2-memory; 3-first arc-shaped rod; 4-second arc-shaped rod; 5-connecting tube; 6-outer ring; 7-first inner ring; 8-second inner ring; 9-baffle. DETAILED DESCRIPTION

[0024] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used to explain the principles of the present invention together with the embodiments of the present invention.

[0025] Example 1

[0026] This embodiment provides a synthetic aperture radar detection capability analysis system, including a grid point coordinate matrix acquisition unit, a slant angle matrix and slant range matrix acquisition unit, an antenna to grid point actual transmission gain matrix and an antenna to grid point actual reception gain matrix acquisition unit, a range resolution acquisition unit, an azimuth resolution acquisition unit, a ground reflection coefficient acquisition unit, a threshold comparison unit, and a graphical display unit.

[0027] The grid point coordinate matrix acquisition unit is used to determine the ground beam coverage range by using the flight parameters of the carrier and the antenna installation angle and scanning range of the synthetic aperture radar, draw a grid within the beam coverage range, and obtain the grid point coordinate matrix within the beam coverage range. For example, the size of the grid point is 500 to 1000 meters.

[0028] The slant angle matrix and slant range matrix acquisition unit is used to calculate the slant angle matrix and slant range matrix corresponding to the grid points within the beam coverage range according to the flight parameters of the carrier and the grid point coordinate matrix;

[0029] The actual transmission gain matrix from the antenna to the grid point and the actual reception gain matrix from the antenna to the grid point are obtained by the unit for calculating the actual transmission gain matrix from the antenna to the grid point and the actual reception gain matrix from the antenna to the grid point according to the off-axis angle. It should be noted that the off-axis angle refers to the angle between the carrier target pointing and the antenna pointing;

[0030] The ground reflection coefficient matrix acquisition unit is used to receive the actual transmission gain matrix from the antenna to the grid point, the actual receiving gain matrix from the antenna to the grid point, the slant angle matrix and the slant range matrix, and calculate the synthetic aperture radar equation based on the actual transmission gain matrix from the antenna to the grid point, the actual receiving gain matrix from the antenna to the grid point, the slant angle matrix, the slant range matrix, the system loss of the synthetic aperture radar (it should be noted that the system loss of the synthetic aperture radar is a fixed value, and each model of synthetic aperture radar has a fixed system loss, generally including waveform loss or transmission loss, etc.) and the average power to obtain the ground reflection coefficient matrix of the grid point at different distance resolutions;

[0031] The range resolution acquisition unit is used to receive the slant range matrix and obtain the range resolution matrix of the grid points according to the bandwidth of the synthetic aperture radar, the height of the carrier and the slant range matrix;

[0032] The azimuth resolution acquisition unit is used to receive the squint angle matrix and the slant range matrix, and obtain the azimuth resolution matrix of the grid points according to the sum speed of the carrier (which can be obtained by calculating the three-dimensional speed of the carrier), wavelength, synthetic aperture time, squint angle matrix and slant range matrix;

[0033] The threshold comparison unit is used to receive the range resolution matrix, the azimuth resolution matrix and the ground reflection coefficient matrix respectively, and compare them with the threshold range stored in the threshold comparison unit, obtain multiple grid points that simultaneously meet the range resolution, azimuth resolution and ground reflection coefficient, and send them to the graphical display unit to display a two-dimensional analysis chart of the synthetic aperture radar detection capability.

[0034] It should be noted that the carrier refers to the substrate used to carry the synthetic aperture radar, such as aircraft, satellites and other aircraft; the flight parameters of the carrier include the coordinates, pitch attitude, yaw attitude, roll attitude and three-dimensional speed of the carrier in the navigation coordinate system.

[0035] According to the two-dimensional analysis diagram obtained by the above system, the beam coverage range can be divided into multiple areas, and the resolution distribution characteristics within the ground beam coverage range at different oblique angles can be obtained, for example, resolving 1 meter × 1 meter × sigma (ground reflection coefficient) = -12, 3 meters × 3 meters × sigma (ground reflection coefficient) = -12 and 5 meters × 5 meters × sigma (ground reflection coefficient) = -12. In practical applications, for example, the grid points of the circular marks are grid points that meet the distance resolution and azimuth resolution of 1 meter × 1 meter × sigma (ground reflection coefficient) = -12, the grid points of the cross-shaped marks are grid points that meet the distance resolution and azimuth resolution of 3 meters × 3 meters × sigma (ground reflection coefficient) = -12, and the grid points of the triangular marks are grid points that meet the distance resolution and azimuth resolution of 5 meters × 5 meters × sigma (ground reflection coefficient) = -12. When the carrier needs to perform image detection with a distance resolution and azimuth resolution of 1 meter × 1 meter × sigma (ground reflection coefficient) = -12, the various parameters of the carrier and the radar can be controlled to be consistent with the various parameters corresponding to the grid points of the circular marks, so that image detection with a distance resolution and azimuth resolution of 1 meter × 1 meter × sigma (ground reflection coefficient) = -12 can be achieved, thereby guiding radar image detection.

[0036] During implementation, the ground beam coverage range is determined using the flight parameters of the carrier and the antenna installation angle and scanning range of the SAR. A grid is drawn within the beam coverage range to obtain the grid point coordinate matrix within the beam coverage range. The slant angle matrix and slant range matrix corresponding to the grid points within the beam coverage range are calculated based on the flight parameters of the carrier and the grid point coordinate matrix. The actual transmission gain matrix from the antenna to the grid point and the actual reception gain matrix from the antenna to the grid point are calculated based on the off-axis angle. It should be noted that the off-axis angle refers to the angle between the carrier target pointing and the antenna pointing. The actual transmission gain matrix from the antenna to the grid point, the actual reception gain matrix from the antenna to the grid point, the slant angle matrix, the slant range matrix, and the system loss of the SAR (it should be noted that the system loss of the SAR is a fixed value, and each model of SAR has a fixed value) are calculated. The SAR equation is calculated based on the given system loss (usually including waveform loss or transmission loss, etc.) and average power to obtain the ground reflection coefficient matrix of the grid points at different range resolutions; the range resolution matrix of the grid points is obtained based on the SAR bandwidth, carrier height and slant range matrix; the azimuth resolution matrix of the grid points is obtained based on the carrier's velocity (which can be obtained by calculating the carrier's three-dimensional velocity), wavelength, synthetic aperture time, squint angle matrix and slant range matrix; the range resolution in the range resolution matrix of the grid points, the azimuth resolution in the azimuth resolution matrix and the ground reflection coefficient in the ground reflection coefficient matrix are screened according to the threshold range to obtain multiple grid points that simultaneously meet the range resolution, azimuth resolution and ground reflection coefficient requirements, and graphically display them to obtain a two-dimensional analysis diagram.

[0037] Compared with the existing technology, the synthetic aperture radar detection capability analysis system provided in this embodiment comprehensively calculates and filters indicators such as range resolution, azimuth resolution, and ground reflection coefficient, which were previously calculated separately, to meet the needs of synthetic aperture radar detection capability analysis. It presents the radar capability boundaries in multiple dimensions through two-dimensional images, maps the vehicle's position, three-dimensional velocity, and three-dimensional posture to multiple dimensions such as the synthetic aperture radar's effective range, slant angle, and off-axis angle, and presents the distribution characteristics of the resolution within the ground beam coverage range. This achieves a detailed visualization of the coupling relationship between various synthetic aperture radar detection parameters and the detection boundaries, providing systematic support for radar solution design.

[0038] Specifically, in the above-mentioned grid point coordinate matrix acquisition unit, the grid point coordinate matrix adopts the following formula:

[0039] T x =[x1,x2,…,x M ]

[0040] T z =[z1,z2,…,z N ]

[0041] Among them, x1, xM 、z1、z N are the coordinates of the intersection of the maximum coverage range of the beam and the two-dimensional coordinate axis of the ground, T x 、T z is the two-dimensional coordinate matrix of the grid points, x is an integer from 1 to M, and z is an integer from 1 to N.

[0042] In the above-mentioned slant angle matrix and slant distance matrix acquisition unit, the slant angle matrix θ( and the slant distance matrix R are calculated using the following formula:

[0043] θ v =arctan(v z / v x )

[0044] θ p =arctan(T z -P z ) / (T x -P z )

[0045] θ=θ p -θ v

[0046]

[0047] Among them, θ (is the slant angle matrix, R is the slant distance matrix, v x is the north velocity of the carrier in the navigation coordinate system, v z is the east speed of the carrier in the navigation coordinate system, (P x ,P y ,P z ) is the coordinate of the carrier in the navigation coordinate system, T x 、T z is the two-dimensional coordinate matrix of the grid points, x is an integer from 1 to M, and z is an integer from 1 to N.

[0048] In the above-mentioned actual transmission gain matrix from antenna to grid point and actual receiving gain matrix from antenna to grid point obtaining unit, the actual transmission gain matrix from antenna to grid point G tT And the actual receiving gain matrix G from the antenna to the grid point rT The calculation is based on the following formula:

[0049]

[0050]

[0051] Among them, G t is the antenna transmission gain, G r G is the antenna receiving gain. Each model of GAR has a fixed G t and Gr , both are known values, G tT is the actual transmission gain matrix from the antenna to the grid point, G rT is the actual receiving gain matrix from the antenna to the grid point, is the off-axis angle matrix.

[0052] In the above ground reflection coefficient matrix acquisition unit, the ground reflection coefficient matrix is ​​calculated using the following formula:

[0053]

[0054] Where σ is the ground reflection coefficient matrix, R is the slant range matrix, K = 1.38 × 10 -23 is the Boltzmann constant, T0 is the noise temperature, F n is the noise coefficient, L is the system loss, v is the sum velocity of the carrier in the northeast plane in the navigation coordinate system, θ (is the oblique viewing angle matrix, P av is the average power, G tT is the actual transmission gain matrix from the antenna to the grid point, G rT is the actual receiving gain matrix from the antenna to the grid point, SNR is the image signal-to-noise ratio, λ is the wavelength, D r is the range resolution (in this formula, is the specified value), and k=1.4 is the azimuth broadening factor.

[0055] In the above distance resolution acquisition unit, the distance resolution matrix D r The calculation is based on the following formula:

[0056]

[0057]

[0058] Among them, D r is the distance resolution matrix, R is the slant range matrix, B r is the bandwidth of synthetic aperture radar, (P x ,P y ,P z ) is the coordinate of the carrier in the navigation coordinate system, k is the azimuth broadening factor, c is the speed of light, and β is the ground-grabbing angle.

[0059] In the above-mentioned azimuth resolution acquisition unit, the azimuth resolution matrix D a The calculation is based on the following formula:

[0060]

[0061] Among them, D ais the azimuth resolution matrix, k is the azimuth broadening factor, λ is the wavelength, R is the slant range matrix, v is the sum velocity of the carrier in the northeast plane in the navigation coordinate system, θ (is the slant angle matrix, T a is the synthetic aperture time.

[0062] It is worth noting that, in practical applications, the velocity error and height error of the carrier will also affect the detection capability of the synthetic aperture radar. Therefore, the above-mentioned synthetic aperture radar detection capability analysis system also includes a distortion rate acquisition unit;

[0063] The threshold comparison unit receives the distortion rate and compares the distortion rates corresponding to multiple grid points that simultaneously meet the distance resolution, azimuth resolution and ground reflection coefficient with the threshold stored in the threshold comparison unit, obtains multiple grid points that simultaneously meet the distance resolution, azimuth resolution, ground reflection coefficient and distortion rate and sends them to the graphical display unit to display a two-dimensional analysis graph.

[0064] It can be understood that in order to realize the storage of the above-mentioned units, the above-mentioned synthetic aperture radar detection capability analysis system also includes a memory 2 for storing a grid point coordinate matrix acquisition unit, a slant angle matrix and a slant range matrix acquisition unit, an antenna to grid point actual transmission gain matrix and an antenna to grid point actual reception gain matrix acquisition unit, a distance resolution acquisition unit, an azimuth resolution acquisition unit, a ground reflection coefficient acquisition unit, a threshold comparison unit and a graphical display unit. Exemplarily, the memory 2 can be a chip.

[0065] In order to effectively protect the memory 2, the above-mentioned synthetic aperture radar detection capability analysis system also includes a shell 1. The memory 2 is arranged in the shell 1. The shell 1 can effectively protect the memory 2 and extend its service life.

[0066] In practical applications, considering that the memory 2 is an electronic device, when the carrier is an aircraft, the memory 2 will inevitably be subjected to a certain impact when the carrier lands. The above-mentioned synthetic aperture radar detection capability analysis system also includes a buffer, and the memory 2 is detachably connected to the housing 1 through the buffer. Figure 1 .

[0067] By way of example, the buffer member comprises a first curved rod 3, a connecting tube 5, and a second curved rod 4. One end of the first curved rod 3 is slidably connected to one end of the second curved rod 4 via the connecting tube 5. The other ends of the first curved rod 3 and the second curved rod 4 are connected to the housing 1, and the reservoir 2 is disposed on the connecting tube 5. Thus, on the one hand, because both the first curved rod 3 and the second curved rod 4 are curved, when the reservoir 2 is impacted, the first curved rod 3 and the second curved rod 4 can undergo a certain degree of elastic deformation, thereby providing a buffering effect. On the other hand, one end of the first curved rod 3 is slidably connected to one end of the second curved rod 4 via the connecting tube 5. During the elastic deformation of the first curved rod 3 and the second curved rod 4, the ends of the two rods approach each other, increasing their elastic deformation and thus further buffering the impact.

[0068] Considering that any material has a deformation limit, in order to avoid the first curved rod 3 and the second curved rod 4 from being damaged due to excessive deformation, it is necessary to appropriately limit the relative sliding displacement between the first curved rod 3 and the second curved rod 4. One end of the connecting tube 5 is sleeved on the outer wall of the first curved rod 3, and the other end of the connecting tube 5 is sleeved on the outer wall of the second curved tube. Limiting members are provided between the connecting tube 5 and the first curved rod 3 and between the connecting tube 5 and the second curved rod 4. Figure 2 .

[0069] Exemplarily, the limiting member includes an outer ring 6 provided on the outer walls of the first arc rod 3 and the second arc rod 4 and an inner ring provided on the inner wall of the connecting tube 5. The outer ring 6 is a rigid ring and the inner ring is an elastic ring. The inner diameter of the inner ring is smaller than the outer diameter of the outer ring 6. As the inner diameters of the multiple inner rings gradually decrease as they approach the midpoint of the connecting tube 5.

[0070] Taking the inner ring and outer ring 6 between the connecting tube 5 and the first arc rod 3 as an example, the number of outer ring 6 is 1, and the number of inner rings is 2, namely the first inner ring 7 and the second inner ring 8. A baffle 9 is provided on the side of the second inner ring 8 away from the first inner ring 7. When not impacted, the outer ring 6 is located on the side of the first inner ring 7 away from the second inner ring 8 and does not contact the first inner ring 7; when the elastic deformation of the first arc rod 3 is too large, the outer ring 6 squeezes the first inner ring 7 and enters between the first inner ring 7 and the second inner ring 8, and collides with the second inner ring 8, absorbing part of the impact force, and the second inner ring 8 can limit the sliding displacement between the first arc member and the connecting tube 5 to a certain extent, preventing the outer ring 6 from further sliding displacement; when the first arc rod 3 is close to the maximum elastic deformation, the outer ring 6 squeezes the second inner ring 8 and abuts against the baffle 9, thereby preventing the outer ring 6 from further sliding displacement, thereby avoiding damage to the outer ring 6.

[0071] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with this technical field within the technical scope disclosed by the present invention should be covered by the scope of protection of the present invention.

Claims

1. A synthetic aperture radar detection capability analysis system, characterized in that: It includes a grid point coordinate matrix acquisition unit, a slant angle matrix and slant range matrix acquisition unit, an antenna to grid point actual transmission gain matrix and an antenna to grid point actual reception gain matrix acquisition unit, a range resolution acquisition unit, an azimuth resolution acquisition unit, a ground reflection coefficient matrix acquisition unit, a threshold comparison unit and a graphical display unit; The slant angle matrix and slant range matrix acquisition unit is used to receive the grid point coordinate matrix and calculate the slant angle matrix and slant range matrix corresponding to the grid points within the beam coverage range; the ground reflection coefficient matrix acquisition unit is used to receive the actual transmission gain matrix from the antenna to the grid point, the actual receiving gain matrix from the antenna to the grid point, the slant angle matrix and the slant range matrix and calculate the ground reflection coefficient matrix of the grid point at different distance resolutions; the distance resolution acquisition unit is used to receive the slant range matrix and calculate the distance resolution matrix of the grid point; the azimuth resolution acquisition unit is used to receive the slant angle matrix and the slant range matrix and calculate the azimuth resolution matrix of the grid point; The threshold comparison unit is used to receive the range resolution matrix, the azimuth resolution matrix and the ground reflection coefficient matrix respectively and compare them with the threshold range stored in the threshold comparison unit, obtain multiple grid points that simultaneously meet the range resolution, azimuth resolution and ground reflection coefficient, and send them to the graphic display unit to display a two-dimensional analysis diagram of the synthetic aperture radar detection capability; In the slant angle matrix and slant distance matrix acquisition unit, the slant angle matrix θ and the slant distance matrix R are calculated using the following formula: θ v =arctan(v z / v x ) θ=θ p -θ v In the ground reflection coefficient matrix acquisition unit, the ground reflection coefficient matrix is ​​calculated using the following formula: In the distance resolution acquisition unit, the distance resolution matrix D r The calculation is based on the following formula: In the azimuth resolution acquisition unit, the azimuth resolution matrix D a The calculation is based on the following formula: In the above formula, θ is the slant angle matrix, R is the slant distance matrix, and v x is the north velocity of the carrier in the navigation coordinate system, v z is the east speed of the carrier in the navigation coordinate system, (P x ,P y ,P z ) is the coordinate of the carrier in the navigation coordinate system, T x 、T z is the two-dimensional coordinate matrix of the grid points, x is an integer from 1 to M, z is an integer from 1 to N, σ is the ground reflection coefficient matrix, K = 1.38 × 10 -23 is the Boltzmann constant, T0 is the noise temperature, F n is the noise coefficient, L is the system loss, v is the velocity of the carrier in the northeast plane in the navigation coordinate system, P av is the average power, G tT is the actual transmission gain matrix from the antenna to the grid point, G rT is the actual receiving gain matrix from the antenna to the grid point, SNR is the detection signal-to-noise ratio, λ is the wavelength, D r is the range resolution, k=1.4 is the azimuth broadening factor, B r is the bandwidth of SAR, c is the speed of light, β is the grazing angle, D a is the azimuth resolution matrix, T a is the synthetic aperture time.

2. The synthetic aperture radar detection capability analysis system according to claim 1, characterized in that: The size of the grid points is 500-1000m.

3. The synthetic aperture radar detection capability analysis system according to claim 1, characterized in that: The system loss includes waveform loss or transmission loss.

4. The synthetic aperture radar detection capability analysis system according to claim 1, characterized in that: It also includes a distortion rate acquisition unit.

5. The synthetic aperture radar detection capability analysis system according to claim 4, characterized in that: The threshold comparison unit receives the distortion rate and compares the distortion rates corresponding to multiple grid points that simultaneously meet the distance resolution, azimuth resolution and ground reflection coefficient with the threshold stored in the threshold comparison unit, obtains multiple grid points that simultaneously meet the distance resolution, azimuth resolution, ground reflection coefficient and distortion rate and sends them to the graphical display unit to display a two-dimensional analysis graph.

6. The synthetic aperture radar detection capability analysis system according to any one of claims 1 to 5, characterized in that: It also includes a memory for storing a grid point coordinate matrix acquisition unit, a slant angle matrix and a slant range matrix acquisition unit, an actual transmission gain matrix from the antenna to the grid point and an actual receiving gain matrix from the antenna to the grid point, a distance resolution acquisition unit, an azimuth resolution acquisition unit, a ground reflection coefficient acquisition unit, a threshold comparison unit, and a graphical display unit.

7. The synthetic aperture radar detection capability analysis system according to claim 6, characterized in that: The memory is a chip.

8. The synthetic aperture radar detection capability analysis system according to claim 7, characterized in that: It also includes a shell, and the memory is arranged in the shell.

9. The synthetic aperture radar detection capability analysis system according to claim 8, characterized in that: A buffer is also included, and the storage is connected to the housing via the buffer.

10. The synthetic aperture radar detection capability analysis system according to claim 9, characterized in that: The memory is detachably connected to the housing via a buffer.

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