Mr. Yiqiu Zhang Profile

Yiqiu Zhang

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Proceedings Article | 26 July 2024 Paper

Test method for the impact of micro-vibration on coastal zone imager

Jun Zheng, Xiaohong Zhang, Bei Chu, Yiqiu Zhang

Proceedings Volume 13189, 131890B (2024) https://doi.org/10.1117/12.3032193

KEYWORDS: Imaging systems, Satellites, Modulation transfer functions, Image analysis, Image quality, Image resolution, Design, Vibration isolation, Image processing, Target acquisition

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The new generation of ocean color observation satellites in China has many moving mechanism components, and the impact of micro-vibration generated by the satellite on the imaging quality of the high-resolution new generation coastal zone imager cannot be ignored. This article provides a testing method for the impact of micro-vibration on the imaging quality of coastal zone imager. Through imaging based on resolution target, the uniform illumination of integrating sphere radiation source is on the black and white stripe resolution plate, and the imaging of resolution plate is on the measured device through optical system. The image acquisition equipment collects black and white stripe image signals output from the coastal zone imager. According to various mechanism components on the whole satellite, this article divides into multiple working modes, and image data corresponding to each working mode is collected separately. Then, image centroid calculation analysis, MTF test image calculation analysis, and pixel DN value calculation analysis are carried out respectively. It is concluded that the refrigerator micro-vibration has the greatest impact on the imaging quality of coastal zone imager. Through image data calculation analysis and comparison under two different scenarios of satellite installation vibration reduction device and installation process support, the effectiveness of satellite vibration reduction and isolation system design is verified. The research example proves the feasibility of this testing method, providing a basis for improving the imaging quality of satellite, and the research results can provide reference for vibration isolation and suppression design of satellite.

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