An In-Motion Imaging Attitude Modeling Method for Optical Remote Sensing Satellite Point Target Observation Missions

Abstract

The invention discloses an optical remote sensing satellite point target observation task dynamic imaging posture modeling method, which comprises the steps of obtaining the point target observation task center point imagining time of a satellite, camera station point position, posture pointing parameters and satellite orbit coordinate parameter sequences; calculating the camera pupil entrance radiant brightness and the camera integral time of the satellite on the observation task center point imagining time; on the basis of the camera integral time, processing the relevant parameters to obtain the camera station point scanning ground velocity of the satellite on the observation task center point imagining time, and using the scanning ground velocity as the constant scanning ground velocity; on the basis of the constant scanning ground velocity, solving the observation task path camera station point geographic position parameter sequence and the corresponding imaging time; calculating the posture rolling angle parameter, the posture pitch angle parameter, the posture yaw angle parameter and the corresponding angular speed parameter of each imaging time of the observation task, and completing the dynamic imaging posture model building on the basis. The effective combination of task planning and satellite posture control can be realized to a certain degree.

Description

technical field [0001] The invention belongs to the field of satellite imaging task analysis and attitude control, in particular to an imaging attitude modeling method in motion for an optical remote sensing satellite point target observation task. Background technique [0002] High-agility attitude maneuvering capability is one of the important development directions of optical remote sensing satellites. Traditional agile optical remote-sensing satellites (hereinafter referred to as agile satellites) use agile attitude maneuvers to quickly adjust the attitude pointing before imaging to point the optical axis of the satellite camera to the observation target. After imaging, agile attitude maneuvers are also used to quickly reset the attitude or point to the next observation target. However, during the imaging process, traditional agile satellites do not perform attitude maneuvers, but still use traditional passive push-broom imaging. [0003] Optical remote sensing satellite...

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Problems solved by technology

[0010] (1) Patent "A Method for Realizing an Agile Satellite On-Orbit Mobile Imaging Task", ZL201210253812.8, Aerospace Dongfanghong Satellite Co., Ltd., proposed a satellite mobile imaging command annotation and on-board computer control method, which can be used in motion Attitude control of imaging satellites, but this result has no basis for how to convert observation task requirements into satellite control instructions and on-board computer control;

[0011] (2) Patent "A attitude adjustment method for dynamic imaging of agile satellites", ZL201310028956.8, Aerospace Dongfanghong Satellite Co., Ltd., proposed a large-width imaging method in the process of attitude adjustment using agile satellite dynamic imaging , but this result is not suitable for point target observation task planning and attitude control;

[0012] (3) Patent application "A New Imaging Method for Agile Satellite Maneuvering", 201410163903.1, Aerospace Dongfanghong Satellite Co., Ltd., proposed a method for calculating the attitude angle of agile satellite maneuvering imaging process based on the geographic location of known ground feature imaging feature points , but it does not explain how to obtain the geographic location of feature points in ground object imaging, nor does it explain the relationship between the requirements of the observation task and the determination of the location of feature points in ground feature imaging;

[0013] (4) Patent application "A Trajectory Planning Method for Attitude Maneuvering", 201410515853.9, Beijing Control Engineering Research Institute, proposed a satellite multi-axis shortest attitude maneuvering based on the initial attitude quaternion and target attitude quaternion of satellite attitude maneuvering The trajectory path planning method can be used for attitude control of imaging satellites in motion, but the focus of this achievement is on the description of the attitude control method of the satellite control mechanism, and does not involve how to calculate the parameters required for attitude control based on the requirements of the observation task;

[0014] (5) Patent application "A Method for Attitude Maneuvering Planning in Agile Satellite Imaging Process", 201510257857.6, Beijing Space Vehicle Overall Design Department, proposed an imaging based on the starting point, ending point and corresponding time and orbit parameters of agile satellite maneuvering imaging The process attitude calculation method can be used for attitude control of imaging satellites in motion, but it does not explain how to obtain parameters such as the start point, end point and corresponding time of agile satellite imaging in motion, nor how to convert the user's requirements for observation tasks into satellites attitude control parameters;

The main problems are as follows: lack of the construction of quantitative coupling relationship model between observation mission planning and satellite attitude control, and it is difficult to realize the effective combination of mission planning and satellite attitude control

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