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

A detection method for along-orbit attitude flutter of a high-resolution three-line array satellite

A high-resolution, three-line array technology, applied in the interpretation of photos and other directions, can solve problems such as the inability to detect attitude flutter, and achieve the effect of accurate calculation and wide application range

Active Publication Date: 2017-06-13
TONGJI UNIV
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tong et al. (2015c) proposed a method for flutter detection in the vertical track direction based on three-line array images. This method can effectively detect the attitude flutter effect of the three-line array sensor in the vertical track direction, but it cannot detect the attitude flutter along the track direction. vibration

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
  • A detection method for along-orbit attitude flutter of a high-resolution three-line array satellite
  • A detection method for along-orbit attitude flutter of a high-resolution three-line array satellite
  • A detection method for along-orbit attitude flutter of a high-resolution three-line array satellite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0043] The image square deviation affecting the along-track direction is mainly caused by the attitude angle Pitch. It is assumed that the attitude measurement value is an ideal orbit parameter that is not affected by flutter, and the actual attitude value is an orbit parameter affected by flutter. The attitude angle Pitch flutters Vibration detection principle such as figure 1 shown.

[0044]In the figure, under the ideal orbit not affected by flutter, the ground point G is imaged at the ideal image point in the image space of the lower, front and rear images respectively and Let the exposure times of the bottom, front and rear view sensors be t respectively 1 , t 2 and t 3 . In the actual attitude, the attitude angle Pitch changes, and the ideal image points are respectively shifted to the image point p affected by the flutter 1 ,p 2 and p 3 , then the distance between the image point affected by flutter and the ideal image point on the down, front, and rear view i...

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 relates to a method for detecting posture flutter of high resolution three linear array satellites along a rail direction, which comprises the steps: 1, three linear array image homonymy points are matched, and matched gross errors are removed; 2, projection deviation of three linear array images are obtained along the rail direction, and a flutter estimation function model is built; and 3, the posture flutter of the three linear array images along the rail direction is estimated. Compared with the prior art, the method for detecting posture flutter of the high resolution three linear array satellites along the rail direction has the advantages of advanced method, accurate calculating and wide applied range and the like.

Description

technical field [0001] The invention relates to a method for detecting satellite attitude flutter, in particular to a method for detecting attitude flutter of a high-resolution three-line array satellite in the orbital direction. Background technique [0002] The stability of the platform attitude is one of the key factors determining the geometric positioning accuracy of high-resolution satellites, and the flutter of satellite platforms is a common and complex phenomenon in the operation of high-resolution satellites, and the impact on the geometric accuracy of imaging is an unresolved problem. scientific problems. Many remote sensing satellites are affected by attitude flutter, which leads to a sharp drop in geometric positioning accuracy. Platform flutter is a common challenge faced by remote sensing satellites at home and abroad in terms of geometric positioning (Iwasaki, 2011). [0003] The most conventional method to solve attitude flutter is to install attitude senso...

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): G01C11/14
CPCG01C11/14
Inventor 童小华李凌云金雁敏刘世杰叶真谢欢陈鹏徐聿升王凤香孙文正
Owner TONGJI UNIV