Attitude adjusting method in imaging along oblique strip

An adjustment method and oblique strip technology, applied in attitude control and other directions, can solve problems such as difficulty in ensuring imaging quality during maneuvering, inability to realize oblique strip imaging attitude planning, and lack of imaging drift angle compensation.

Active Publication Date: 2015-10-28
AEROSPACE DONGFANGHONG SATELLITE
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Problems solved by technology

The imaging mode in motion is described in detail by Huang Qundong in the 12th issue of "Optical Precision Engineering" in 2012, "Image Movement Velocity Calculation when Attitude to Ground Pointing is Changing Imaging". The imaging method during maneuveri

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  • Attitude adjusting method in imaging along oblique strip
  • Attitude adjusting method in imaging along oblique strip
  • Attitude adjusting method in imaging along oblique strip

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[0060] The present invention will be further described in detail below in conjunction with the drawings and specific embodiments:

[0061] Such as figure 1 As shown in the method flow chart, the present invention is aimed at imaging along the oblique strip. Based on the planning of the sliding speed of the shooting point along the oblique strip, the imaging posture maneuver model is established to realize the tracking of the shooting point and the drift angle compensation of imaging. , The three-axis attitude and attitude tracking angular velocity of the camera carrier (satellite, spacecraft, etc.) during the imaging process along the oblique strip are obtained, and the attitude adjustment of the imaging along the given oblique strip during the attitude maneuver is realized.

[0062] (1) Determine the geometric parameters of the oblique strip

[0063] Build as figure 2 In the oblique strip model shown, on the oblique strip, an arc centered on the center of the earth is formed from ...

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Abstract

The invention provides an attitude adjusting method in imaging of an oblique strip. The attitude adjusting method has high practicability in high-resolution imaging tasks for imaging sub-satellite point tracks such as roads, coast lines, border lines which are not parallel along an oblique strip. The invention aims at a problem of no dynamic attitude adjusting method in imaging along the oblique strip, and provides the attitude adjusting method in which the sliding speed of a photographing point along a preset oblique strip is set and then imaging is performed through dynamically tracking the sliding of the photographing point through the satellite attitude and finally drift angle compensation is performed, thereby realizing imaging along a preset target oblique strip. The attitude adjusting method of the invention can satisfy a requirement of satisfying different imaging tasks through changing the sliding speed of the photographing point along the oblique strip, such as quick push-broom imaging which can realize an emergency imaging task and slow push-broom imaging with prolonged exposure time for improving an imaging quality.

Description

technical field [0001] The invention relates to the technical field of spacecraft attitude adjustment, in particular to an attitude adjustment method for imaging along a slant strip, which is used for realizing the attitude maneuver adjustment of a camera carrier during imaging along a given slant strip. Background technique [0002] In traditional static imaging, since the push-broom ground speed is mainly caused by orbital motion, its imaging trajectory is considered to be a parallel subplanetary point trajectory, and a section of trajectory is called a strip, and the splicing and imaging of rectangular areas can be realized by strip splicing. However, for high-resolution imaging tasks such as roads, coastlines, and borders that are moving toward uneven subplanetary trajectories, traditional static imaging requires multiple observations to obtain a complete image because the strip must be parallel to the subplanetary trajectory. It cannot meet the needs of real-time acquis...

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Application Information

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IPC IPC(8): G05D1/08
Inventor 黄敏葛玉君杨芳黄群东王抒雁
Owner AEROSPACE DONGFANGHONG SATELLITE
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