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A SAR image scaler placement method and system in a complex urban environment
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A complex environment, scaler technology, applied in the field of radar detection
Active Publication Date: 2022-07-19
AEROSPACE INFORMATION RES INST CAS
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[0011] The purpose of the present invention is to provide a SAR image scaler placement method and system in a complex urban environment, so as to solve the technical problems existing in the prior art
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Embodiment 1
[0067] This embodiment provides a method for placing a SAR image scaler in a complex urban environment, including: selection of the position of the corner reflector and setting of the attitude of the corner reflector;
[0068] The method for selecting the position of the corner reflector includes: according to the beam angle of the SAR sensor, calculating the front overlap area and the rear shadow area of the objects around the place where the corner reflector is to be placed, as well as the strong impact caused by similar corner-reflecting components in the building shape structure. Scatter the area of influence; avoid these areas of influence and choose the placement of the corner reflector;
[0069] The method for setting the attitude of the corner reflector includes: calculating the azimuth, pitch and roll angles of different types of corner reflectors according to the track azimuth of the sensor platform and the beam viewing angle of the SAR sensor, and according to th...
Embodiment 2
[0106] According to the method described in Embodiment 1, this embodiment applies the solution described in Embodiment 1 according to the specific background and application scenario, such as figure 1 As shown, a SAR image scaler placement method in a complex urban environment is provided, including:
[0107] The selection of the position of the corner reflector and the setting of the attitude of the corner reflector;
[0108] The method for selecting the position of the corner reflector includes: according to the beam angle of view φ of the SAR sensor, calculating the front overlap area and the rear shadow area of the objects around the place where the corner reflector is to be placed, as well as similar corner-reverse components in the building shape structure. The area of influence caused by strong scattering; avoid these areas of influence, and select the placement position of the corner reflector;
[0109] The method for setting the attitude of the corner reflector inc...
Embodiment 3
[0157] According to the above solution, the present invention also provides a SAR image scaler placement system in a complex urban environment,
[0158] It includes: a selection module for the position of the corner reflector and a setting module for the attitude of the corner reflector.
[0159] The selection module for the position of the corner reflector: According to the beam angle φ of the SAR sensor, calculate the front overlapping area and the rear shadow area of the objects around the place where the corner reflector is to be placed, and the similar corner reflection components in the building shape structure. Areas of influence of strong scattering; avoid these areas of influence and make the choice of where to place the corner reflector.
[0160] The attitude setting module of the corner reflector: according to the track azimuth of the sensor platform and the beam angle φ of the SAR sensor, calculate the azimuth, pitch and roll angles of different types of corner r...
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Abstract
The invention provides a method and system for placing a SAR image scaler in a complex urban environment. The method includes: selection of the position of the corner reflector and setting of the attitude of the corner reflector; the method of selecting the position of the corner reflector includes: according to the beam angle of view φ of the SAR sensor, calculating the location around the place where the corner reflector is to be placed. The overlapping area in front of the object, the shadow area in the rear, and the strong scattering influence area caused by similar corner-reverse components in the building shape structure; avoid these influence areas, and select the placement position of the corner reflector; the attitude of the corner reflector The setting method includes: calculating the azimuth angle, pitch angle and roll angle of different types of angular reflectors according to the track azimuth of the sensor platform and the beam angle of the SAR sensor, and setting the angle according to the inclinometer and single-station GPS measurement equipment. The pose of the reflector. The azimuth setting and angle of the SAR image are stabilized, and the quality of the SAR image is improved.
Description
technical field [0001] The invention relates to the technical field of radar detection, in particular to a method and system for placing a SAR image scaler in a complex urban environment. Background technique [0002] Synthetic Aperture Radar (SAR) can be mounted on a satellite platform or an airborne platform, and emit coherent electromagnetic waves of different polarizations laterally on the flight path, irradiate the ground and receive and record the intensity of these electromagnetic waves reflected back to the receiving antenna. and phase, after imaging processing to generate a SAR image. SAR images contain three types of information including intensity, polarization, and phase. After calibration, a qualified SAR image product is generated [0003] At present, it is necessary to place the calibrator on the ground to realize the calibration of the measurement quantities such as the intensity, phase, and polarization of the SAR image, so as to correct the systematic err...
Claims
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Application Information
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