Attitude adjustment method for curve stripe imaging in agile satellite maneuver

Abstract

The present invention relates to an attitude adjustment method for curve stripe imaging in agile satellite maneuver. The method comprises the following steps that: (1) a polynomial model between the position coordinates of a curve target under an earth-fixed reference system and imaging cumulative time is established; (2) the roll angle and pitch angle of a satellite are calculated according to the polynomial model of the curve target obtained in step (1); and (3) the yaw angle of the satellite is calculated according to the polynomial model of the curve target obtained in step (1) and the roll angle and pitch angle obtained in the step (2). The method can support the one-time continuous imaging of curve targets along highways, coastlines and borderlines and can significantly improve the use efficiency of the in-orbit operation of the satellite. According to the method, the influence of the ellipticity of the earth is considered, and therefore, the target can be covered more accurately, and imaging quality is high. The method can be applied to the attitude planning of curve strip imaging in agile satellite maneuver.

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 curved strips during agile satellite maneuvers. Background technique [0002] Traditional optical remote sensing agile satellites generally rely on the orbital motion of the satellite to achieve push-broom imaging of the target area, and the imaging geographic area is parallel to the trajectory of the sub-satellite point. On the one hand, such satellites generally adopt sun-synchronous orbits, and their imaging coverage in the east-west longitude direction is relatively weak; Coverage is difficult to achieve with one or multiple strips in the same direction, or the coverage is very ineffective. With the rapid improvement of attitude maneuverability, the new agile satellite can adjust the boresight to the ground pointing for push-broom imaging through the real-time maneuver of attitude. This push-broom imagin...

AI Technical Summary

Problems solved by technology

The shortcomings of these two methods are mainly manifested in: (1) they are only suitable for the imaging of oblique strips, and for curved targets such as border lines and coastlines, it is still necessary to use multiple oblique strips to cover them; (2) they In the description of the strips and the calculation of the attitude angle,

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