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A sliding spotlight synthetic aperture radar and its realization method and device

A synthetic aperture radar, sliding beamforming technology, applied in measurement devices, radio wave reflection/re-radiation, utilization of re-radiation, etc., can solve problems such as high resolution, imaging distance limitation, and inability to reach

Active Publication Date: 2016-04-06
中科卫星山东科技集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] High resolution is an important indicator of SAR. The traditional strip working mode of SAR cannot achieve high resolution due to the limitation of the minimum area of ​​the antenna.
The spotlight mode can achieve high resolution through azimuth scanning, but the imaging distance in azimuth is greatly limited

Method used

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  • A sliding spotlight synthetic aperture radar and its realization method and device
  • A sliding spotlight synthetic aperture radar and its realization method and device
  • A sliding spotlight synthetic aperture radar and its realization method and device

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Embodiment Construction

[0091] In order to understand the characteristics and technical content of the present invention in more detail, the implementation of the present invention will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the present invention.

[0092] figure 1 It is a schematic flow chart of the implementation method of the sliding beam spotting SAR according to the embodiment of the present invention, such as figure 1 As shown, the method includes the following steps:

[0093] Step 101: Based on the system parameters of the sliding beam spotting SAR, calculate the maximum scanning angle and antenna size of the sliding beam spotting SAR.

[0094] Specifically, the working principle of spaceborne sliding spotlight SAR is as follows image 3 As shown, the antenna beam always points to the virtual center O, and the closest slant distance from the satellite to the virtua...

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Abstract

The disclosure discloses a sliding spotlight SAR and a method and device for implementing the same. The method includes that: a maximal scanning angle and an antenna size of a sliding spotlight SAR are calculated based on system parameters of the sliding spotlight SAR; a number of antenna sub-arrays of the sliding spotlight SAR meeting a first condition is determined; a PRF meeting a second and third conditions is determined; information on a beam position of the sliding spotlight SAR is acquired based on the PRF; a key parameter of the sliding spotlight SAR is calculated based on the beam position; and it is determined that the number of antenna sub-arrays meets the first condition and that the PRF meets the second and the third conditions when it is determined that the key parameter meets a preset index. With a technical solution herein, each key parameter of the sliding spotlight SAR can be effectively designed to achieve a high solution and a large azimuthal swath of the sliding spotlight SAR.

Description

technical field [0001] The present invention relates to a sliding beamforming technology in Synthetic Aperture Radar (SAR, Synthetic ApertureRadar), in particular to a sliding beamforming SAR and its implementation method and device. Background technique [0002] High resolution is an important indicator of SAR. The traditional strip working mode of SAR cannot achieve high resolution due to the limitation of the minimum area of ​​the antenna. The spotlight mode can achieve high resolution through azimuth scanning, but the imaging distance in azimuth is greatly limited. The sliding spotlight mode is a combination of the above two working modes. By sliding forward while scanning to achieve high resolution while receiving azimuth width, it is of great significance to the development and application of SAR. [0003] The main design difficulties of sliding spotlight SAR and ordinary SAR lie in the design of antennas with large scanning angles, wave position design and calculatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90
CPCG01S13/12G01S13/90G01S13/9052
Inventor 郭磊王宇邓云凯罗秀莲王伟
Owner 中科卫星山东科技集团有限公司