An Attitude Adjustment Method for Imaging Along Curved Strips During Agile Satellite Maneuvering

Abstract

The invention relates to an attitude adjustment method for imaging along a curved strip during agile satellite maneuvering, the steps are: (1) establishing a polynomial model between the position coordinates of the curved target under the ground-fixed system and the imaging accumulation time; (2) ) based on the curve target polynomial model obtained in step (1) to calculate the roll angle and pitch angle of the satellite; (3) based on the curve target polynomial model obtained in step (1) and the roll angle and pitch angle obtained in step (2), calculate the satellite yaw angle, this method can support one-time continuous imaging of curved targets along roads, coastlines, borders, etc., and can significantly improve the efficiency of satellite in-orbit use; in addition, this method takes into account the influence of the earth's ellipticity, and the coverage target is more accurate , the imaging quality is higher, and it can be used for attitude planning of imaging along curved strips in agile satellite maneuvers.

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 inefficient. 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, it is necessary to assume that the earth is an ideal sphere, which is inconsistent with the actual situation. When the camera field of view is small, there will be cases where the target cannot be covered

Therefore, there is a lack of an effective attitude adjustment method for imaging along curved strips during agile satellite maneuvers

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