Method for determining influence of system error on SAR imaging
A system error and error technology, applied in the field of synthetic aperture radar, can solve problems such as lack of accuracy and effectiveness, difficulty in meeting system design and performance prediction, and achieve the effects of reducing complexity, avoiding dependence, and simplifying the processing flow
Active Publication Date: 2020-12-18
AEROSPACE INFORMATION RES INST CAS +1
View PDF4 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
On the basis of the independent analysis results of each system error, the comprehensive influence of various system errors is extended according to the orthogonal synthesis, which lacks accuracy and effectiveness, and often fails to meet the requirements of system design and performance estimation.
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0021] The technical solution of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. After reading the present invention, those skilled in the art Modifications to various equivalent forms of the present invention fall within the scope defined by the appended claims of the present invention.
[0022] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention.
[0023] refer to figure 1 As shown, a method for determining the influence of sy...
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
Login to View More Abstract
The invention discloses a method for determining the influence of a system error on SAR imaging. The method comprises the steps: under the condition that system errors are not added, calculating the instantaneous slant distance and Doppler parameters of a satellite and a first ground target point; under the condition of adding the system error, calculating the instantaneous slant distance and Doppler parameters of the satellite and the first ground target point; calculating the distance gradient and Doppler gradient of the first ground target point in the ground plane according to the instantaneous slant distance and Doppler parameters of the satellite and the first ground target point after the system error is added; determining a second ground target point according to the distance gradient and the Doppler gradient; under the condition of adding the system error, calculating the instantaneous slant distance and Doppler parameters of the satellite and the second ground target point; and calculating an azimuth secondary phase error, an azimuth tertiary phase error and a position error. According to the method provided by the invention, the complexity of system error analysis can bereduced, and the accuracy of the system error analysis is improved.
Description
technical field [0001] The invention relates to the technical field of synthetic aperture radar (SAR), in particular to a method for determining the influence of system errors on SAR imaging. Background technique [0002] From SAR signal generation to SAR image generation, there are many links such as radar, antenna, and space environment. Every error source in the link will affect the quality of SAR image. Therefore, SAR system error analysis is an important part of system design. [0003] The existing system error analysis process involves the complete chain of echo simulation, imaging processing and index test. Due to the directionality of errors from different sources, different errors may superimpose or weaken each other. Usually, it is necessary to traverse various combinations of system errors to obtain a complete system error situation. The systematic error is not deterministic and invariable, and is generally distributed randomly according to certain statistical ch...
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
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40
CPCG01S7/40
Inventor 黄丽佳吕守业辛煜张彪胡玉新韩冰仇晓兰仲利华
Owner AEROSPACE INFORMATION RES INST CAS