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Calculation Method of Image Motion Compensation Based on Elliptical Orbit

An elliptical orbit and calculation method technology, which is applied in the aerospace field, can solve the problem that the image motion compensation model cannot compensate for the image motion of the elliptical orbit, and achieve the effect of ensuring the accuracy of the image motion compensation.

Active Publication Date: 2020-06-16
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

[0003] In order to solve the problem that the existing image motion compensation model cannot realize the compensation of the image motion of the elliptical orbit, the present invention provides an image motion compensation calculation method based on the elliptical orbit

Method used

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  • Calculation Method of Image Motion Compensation Based on Elliptical Orbit
  • Calculation Method of Image Motion Compensation Based on Elliptical Orbit
  • Calculation Method of Image Motion Compensation Based on Elliptical Orbit

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specific Embodiment approach 1

[0016] Specific implementation mode 1. Combination Figure 1 to Figure 4 To describe this embodiment,

[0017] Step 1. Based on the calculation model of the image motion velocity vector of the near-circular orbit, the image motion velocity vector model of the elliptical orbit is established, such as figure 1 Shown; O is the center of the planet, O b is the orbital center, F 1 and F 2 are the two foci of the ellipse, and B is the position of the spacecraft at a certain moment. During the imaging process, the spacecraft was kept pointing towards the center of the planet. V is the orbital velocity of the spacecraft at this moment, tangent to the orbit, and the optical axis of the camera is along BF 1 The direction points to the center of the planet, and BG is the integral direction of the TDI CCD on the focal plane;

[0018] Step 2. Calculation of elliptical orbital velocity. According to the vitality formula of ellipsoidal motion, the elliptical orbital velocity can be obt...

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Abstract

Based on the calculation method of image motion compensation of elliptical orbit, involving the field of aerospace, it solves the problem that the existing image motion compensation model cannot realize the compensation of image motion of elliptical orbit, and establishes an ellipse with the calculation model of image motion velocity vector of circular orbit and the parameters of elliptical orbit The image movement velocity vector model of the orbit, and calculate the spacecraft elliptical orbital velocity, perigee orbital velocity and apogee orbital velocity; calculate the angle between the orbital velocity and the centrifugal velocity, and obtain the orbital velocity and centrifugal velocity according to the calculated angle, Calculate the height of the elliptical orbit; convert the orbiting speed of the spacecraft to the image movement speed of the image plane through the horizontal coordinate system of the star vertical line, the planetary coordinate system, the planetary inertial coordinate system, the orbital coordinate system, the camera coordinate system and the image plane coordinate system respectively ; Obtain the image motion velocity of the scenic spot on the camera image plane, and compensate the image motion of the ellipse orbit according to the obtained image motion velocity of the image plane.

Description

technical field [0001] The invention relates to the aerospace field, in particular to a calculation method for image motion compensation based on an elliptical orbit. Background technique [0002] The existing image motion compensation model is based on the near-circular orbit of the earth, which is not fully suitable for the elliptical orbit of deep space exploration such as Mars. There is a big difference between the change law of the image motion velocity vector of the elliptical orbit and the near circular orbit: first, the addition of centrifugal velocity (velocity component of the aircraft pointing to the zenith in the orbital plane) makes the change of image motion more complicated, and must be used Real-time calculation of image motion speed, real-time image motion matching, and control of the cumulative error of image motion speed within the allowable range can ensure clear imaging. Second, when imaging at a non-sub-satellite point, the centrifugal velocity will be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D1/08
CPCB64G1/244
Inventor 闫得杰王征何云丰曹小涛王栋
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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