Unlock instant, AI-driven research and patent intelligence for your innovation.

Calculation method of step-scan influence parameter of sliding bunch sar

A sliding beamforming and step-scanning technology, which is applied in the intersection of aerospace and microwave remote sensing, can solve the problem of parameter calculation method for the position and amplitude of paired echoes that have not yet been found.

Active Publication Date: 2019-06-25
NAT UNIV OF DEFENSE TECH
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The paired echo effect caused by the sliding spotlight SAR step scan, the calculation method of the paired echo position and amplitude parameters of the azimuth imaging results caused by this effect has not yet been found

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Calculation method of step-scan influence parameter of sliding bunch sar
  • Calculation method of step-scan influence parameter of sliding bunch sar
  • Calculation method of step-scan influence parameter of sliding bunch sar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The method provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0021] figure 1 It is a flowchart for calculating the influence of the paired echo effect caused by the step scan of the sliding spotlight SAR antenna provided by the present invention. Taking sliding spotlight SAR system parameters as input, the first step is to determine whether the ratio of the frequency position of the first pair of echoes to the width of the main lobe meets the condition, if so, the effect of the paired echo can be ignored, if not If it is satisfied, it is necessary to consider the influence of the paired echo on the imaging result; the second step: calculate the position and amplitude of the double peak of the paired echo.

[0022] figure 2 Schematic diagram of the working geometry of the sliding spotlight SAR. Among them, O is a virtual point, T is any target point in the observation scene, and the thick arrow represents the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a sliding spotlight SAR step scan influence parameter calculating method. The technical solution is characterized in that known systematic parameters of a sliding spotlight SAR include the antenna beam step control time, the wavelength, the antenna azimuth dimension, the platform moving speed, the shortest slant distance from an equivalent antenna phase center to a scene center and the scanning speed of antenna beams, and whether the ratio of the position of maximum paired echoes to the width of main lobes meets an inequation is judged; if yes, it can be determined that the influence of step scan on imaging results is small and negligible. The method can be applied to step scan influence analysis and systematic parameter optimization design of sliding spotlight SARs.

Description

Technical field [0001] The invention belongs to the cross-technology field combining aerospace and microwave remote sensing, and particularly relates to a parameter calculation method for the position and amplitude of the paired echoes of the azimuth imaging result during stepping scanning of a sliding spotlight SAR (Synthetic Aperture Radar) . Background technique [0002] With the increasing development of space technology and microwave detection technology, SAR system, as an important means of space detection, is playing an increasingly important role. At present, the working mode of the SAR system is further expanded and the resolution is further improved. Sliding bunching is a new system SAR working mode obtained by changing the azimuth scanning method. Compared with the traditional strip SAR working mode and spotlight SAR working mode, the sliding spotlight SAR has technical advantages that can compromise the resolution and the azimuth mapping band width, but it also face...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/40
CPCG01S7/4021G01S13/90
Inventor 何志华易天柱何峰董臻吴曼青张永胜黄海风余安喜孙造宇金光虎张启雷
Owner NAT UNIV OF DEFENSE TECH