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Imaging method and device of synthetic aperture radar (SAR)

A technology of synthetic aperture radar and imaging method, which is applied in the field of radar and can solve the problems such as the inability to realize the TOPS mode and the lack of repeated observation.

Active Publication Date: 2017-06-30
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practice, due to the limitation of weight and power consumption, the SAR system only has the capability of simultaneous one-dimensional scanning. In this case, the conventional TOPS mode cannot be realized.
In addition, although the conventional TOPS mode has the ability of wide coverage in the distance direction, it does not have the ability to repeatedly observe the same area

Method used

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  • Imaging method and device of synthetic aperture radar (SAR)
  • Imaging method and device of synthetic aperture radar (SAR)
  • Imaging method and device of synthetic aperture radar (SAR)

Examples

Experimental program
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Effect test

Embodiment 1

[0028] An embodiment of the present invention provides a synthetic aperture radar imaging method, which is applied to a synthetic aperture radar imaging device, figure 1 It is a schematic diagram of the implementation flow of a synthetic aperture radar imaging method according to an embodiment of the present invention, as figure 1 As shown, the method includes the following steps:

[0029] Step S101, determining the scanning parameters for the SAR to perform azimuth beam scanning;

[0030] Here, the scanning parameters at least include: a maximum scanning angle and a scanning period.

[0031] The step S101 further includes:

[0032] Step S101a, determining initial scanning parameters for the SAR to perform azimuth beam scanning;

[0033] Step S101b, acquiring the antenna step angle of the SAR;

[0034] Here, the antenna step angle is set by the staff according to actual needs.

[0035] Step S101c, according to the initial scanning parameters and the antenna step angle, de...

Embodiment 2

[0046] Based on the foregoing embodiments, an embodiment of the present invention further provides a synthetic aperture radar imaging method, which is applied to a synthetic aperture radar imaging device, and the synthetic aperture radar imaging device may be a processor in an actual implementation process. figure 2 It is a schematic diagram of the implementation process of the second synthetic aperture radar imaging method of the present invention, as figure 2 As shown, the method includes the following steps:

[0047] Step S201, acquiring the SAR image of the target observation area to be analyzed;

[0048] Here, the SAR image may be obtained before the synthetic aperture radar used in the embodiment of the present invention, or may be obtained by using other synthetic aperture radars.

[0049] Step S202, analyzing the SAR image to determine an image area that meets preset conditions;

[0050] Here, the preset conditions may be set according to observation requirements i...

Embodiment 3

[0108] The embodiment of the present invention firstly provides a method for realizing repeated observation of the ground by synthetic aperture radar. In this method, only azimuth scanning is required, and by controlling the beam azimuth scanning speed, the same Repeated observations of the region. image 3 It is a schematic diagram of the implementation process of the implementation method of the third synthetic aperture radar to repeat the observation of the ground in the embodiment of the present invention, as image 3 As shown, the method includes the following steps:

[0109] Step S301, determine the input system parameters;

[0110] Here, the system parameters at least include: antenna size and antenna azimuth scanning capability (that is, the actual maximum scanning angle of the antenna azimuth).

[0111] Step S302, determining the input index requirement, that is, the azimuth resolution;

[0112] Step S303, according to the system parameters and the required resolut...

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PUM

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Abstract

The invention discloses an imaging method and device of an SAR. The method comprises that scanning parameters, including the maximal scanning angle and a scanning period at least, of azimuth wave beam scanning of the SAR is determined; the SAR is controlled to carry out present azimuth wave beam scanning from a preset start moment by taking the maximal scanning angle as an initial scanning angle and the scanning period as a time length; after the present azimuth wave beam scanning, the SAR is controlled to carry out next azimuth wave beam scanning till a preset end moment by taking the maximal scanning angle as an initial scanning angle and the scanning period as a time length; and echo data obtained by as azimuth wave beam scanning between the start moment and the end moment is used to carry out SAR imaging.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a synthetic aperture radar imaging method and device. Background technique [0002] Synthetic Aperture Radar (SAR) is a microwave imaging radar that can be installed on aircraft, satellites, spacecraft and other flying platforms to observe the ground all day and all weather, and has certain surface penetration capabilities. . Therefore, the SAR system has unique advantages in the application of disaster monitoring, resource exploration, marine monitoring, environmental monitoring, crop census estimation, surveying and mapping and military investigation, etc., and can play a role that other remote sensing methods are difficult to play. More and more Used in civil and defense fields. [0003] The Terrain Observation by Progressive Scans (TOPS) mode of SAR is a high-resolution wide swath imaging mode, which has the characteristics of surveying bandwidth and low revisit rate. Compa...

Claims

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Application Information

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IPC IPC(8): G01S13/90
CPCG01S13/90G01S13/9056
Inventor 郑明洁禹卫东张磊王宇
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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