Optics and Precision Engineering, Volume. 30, Issue 2, 185(2022)
Influence of attitude and orbit control error of Mars orbiter on image quality of high-resolution camera
The Mars orbiter orbits around Mars in a large elliptical orbit. Its high-resolution camera acts as one of the payloads of the Mars orbiter, and captures images of Mars from its orbit. The imaging quality of the camera is not only related to its own parameters, but also to the attitude and orbit control error. To realize high-resolution photography of Mars, the relationship between attitude and orbit control error and camera imaging quality is investigated in this study. First, the influence model of attitude and orbit control of the platform and image motion calculation of the high-resolution camera was analyzed. Then, the platform for the experiment and verification was built using a collimator and dynamic target simulator. The parameters of the orbit and satellite platform were simulated using ground simulation software, and the parameters were injected into the dynamic target simulator and high-resolution camera. The dynamic target simulator can generate the dynamic target, which is used as the shooting target by the camera, and the velocity of the target varies with the attitude and orbit parameters. The camera performs image motion calculation on real-time and imaged according to the image motion compensation parameters. The experimental results indicate that the dynamic MTF of the camera can be reduced by less than 10% when the orbit accuracy is less than 1 km and velocity accuracy is less than 1 m/s. High-precision attitude and orbit control can guarantee the imaging quality of the high-resolution camera.
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Qi JI, Dong WANG, Dejie YAN, Fanlu WU, Hongyuan WANG. Influence of attitude and orbit control error of Mars orbiter on image quality of high-resolution camera[J]. Optics and Precision Engineering, 2022, 30(2): 185
Received: Sep. 25, 2020
Accepted: --
Published Online: Mar. 4, 2022
The Author Email: WANG Dong (wangd@ciomp.ac.cn)