Agile satellite dynamic imaging posture adjustment method

Abstract

The invention discloses an agile satellite dynamic imaging posture adjustment method which can achieve wide-width imaging in a posture adjusting process. Firstly, a rolling angle of a satellite is adjusted to achieve push-scan imaging in the east-west direction; then, a pitch angle and pitch angular speed of the satellite are adjusted to compensate transport velocity of rail motion on the earth surface; and finally, a yaw angle of the satellite is adjusted to control a drift angle. The posture adjustment method can be applied to dynamic imaging technique for the satellite to open optical effective load to image in a triaxial attitude maneuver process. The covering power of the satellite in the east-west longitude direction in one-loop transit is improved through real-time posture adjustment. The covering width in the east-west longitude direction can reach more than 350km.

Description

technical field [0001] The invention relates to an attitude adjustment method for agile satellite dynamic imaging. Background technique [0002] The dynamic imaging of agile satellites means that the satellite turns on the optical payload and performs imaging during the three-axis attitude maneuver, and adjusts the optical axis to the ground in real time during the imaging process to achieve complex imaging tasks. Due to the combined effect of three-axis attitude maneuvering and orbital motion, the execution efficiency of satellite imaging has been greatly improved. Therefore, dynamic imaging technology will surely become an important direction for the development of aerospace military satellites in the future. [0003] The current satellite strip imaging generally adopts the ground-oriented push-broom imaging mode. The push-broom imaging direction is consistent with the orbiting direction, and the formed strips are basically parallel to the orbit direction. The imaging wid...

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Problems solved by technology

[0005] (1) In the imaging mode mentioned in the article, the imaging width of the spaceborne remote sensor is small, usually a small circular or rectangular area, which cannot effectively cover a wide range of area targets, and the imaging task is single;

[0006] (2) The attitude compensation technology in this paper is based on the ground-oriented push-broom imaging method. In addition to the drift angle control, the attitude compensation technology of the satellite has a nominal value of pitch and roll angular velocity of zero, which cannot realize imaging during the three-axis attitude maneuvering process.

[0007] (3) In the ground-oriented push-broom imaging method, due to the limitation of the imaging width of the optical remote sensor, a multi-strip splicing imaging method is used for large-scale area imaging, and the imaging width is limited

[0009] Based on the above analysis, the attitude adjustment method of the ground-oriented push-broom imaging method cannot meet the requirements of dynamic imaging

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