Satellite platform attitude maneuver method capable of achieving ultrahigh-resolution sliding spotlight mode of satellite-borne SAR

An ultra-high resolution, satellite platform technology, applied in the field of microwave remote sensing in space, can solve the problems of peak gain attenuation, increase the difficulty of engineering realization, increase the weight of the whole satellite, power consumption and development cost.

Active Publication Date: 2017-01-04
XIAN INSTITUE OF SPACE RADIO TECH
View PDF3 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these TR units and networks will greatly increase the weight, power consumption and development cost of the entire star, increasing the difficulty of engineering

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
  • Satellite platform attitude maneuver method capable of achieving ultrahigh-resolution sliding spotlight mode of satellite-borne SAR
  • Satellite platform attitude maneuver method capable of achieving ultrahigh-resolution sliding spotlight mode of satellite-borne SAR
  • Satellite platform attitude maneuver method capable of achieving ultrahigh-resolution sliding spotlight mode of satellite-borne SAR

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0083] The basic idea of ​​the present invention is: a satellite platform attitude maneuver method for realizing the ultra-high resolution sliding spotlight mode of spaceborne SAR, firstly determine the time start and end range of the entire sliding spotlight imaging according to the observation scene position and the orbit information of the satellite platform, This is also the time range for the attitude maneuver of the satellite platform; secondly, use the SAR antenna parameters, resolution indicators, and the perspective of the sub-satellite point where the center of the scene is located to determine the center rotation point during the entire attitude maneuver; finally, according to the position of the rotation center point and the platform attitude maneuver The time range determines the three-axis pointing unit vector of the satellite platform during the maneuver, so as to obtain the precise attitude maneuver mode of the satellite platform during the entire sliding spotlig...

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 discloses a satellite platform attitude maneuver method capable of achieving an ultrahigh-resolution sliding spotlight mode of satellite-borne SAR. The method comprises the following steps: firstly determining a whole sliding spotlight imaging time start-stop range according to observation scene position and satellite platform orbit information, wherein the time start-stop range is a satellite platform attitude maneuver time range; secondly determining a central rotating point of a whole attitude maneuver period by using SAR antenna parameters, resolution indexes and sub-satellite point view angle of the scene center; and finally determining a three-axis direction unit vector of a satellite platform in the maneuver period according to the rotating central point position and the platform attitude maneuver time range so as to obtain the accurate attitude maneuver mode of the satellite platform in the whole sliding spotlight imaging period and ensure that the satellite platform attitude maneuver mode reaches corresponding imaging indexes and finally required satellite-borne SAR image effect.

Description

technical field [0001] The invention relates to a satellite platform attitude maneuver method for realizing a space-borne SAR ultra-high resolution sliding beamforming mode, and belongs to the technical field of space microwave remote sensing. Background technique [0002] In order to meet the increasing reconnaissance requirements of the spaceborne SAR system, it is necessary to use the ultra-wideband transmission signal combined with the ultra-large rotation angle sliding beamforming mode to achieve ultra-high resolution in the range and azimuth directions respectively. If phase electrical scanning is used to realize ultra-wideband large-angle beam scanning, a huge number of TR modules, feeding networks, and thermal control networks are required to ensure the electrical performance of the antenna during beam scanning. However, these TR units and networks will greatly increase the weight, power consumption and development cost of the entire star, increasing the difficulty o...

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
IPC IPC(8): G01S13/90
CPCG01S13/90G01S13/9052
Inventor 李立冯帆贺荣荣高阳杨娟娟金阿鑫孙嘉张选民党红杏谭小敏
Owner XIAN INSTITUE OF SPACE RADIO TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap