The Influence of Image Rotation on Accuracy of Stabilization System of AIMS Solar Telescope

Jiang Jisong; Jiang Aimin

Astronomical Research and Technology > 2020 > 17(3): 376-383.

Jiang Jisong, Jiang Aimin. The Influence of Image Rotation on Accuracy of Stabilization System of AIMS Solar Telescope[J]. Astronomical Research and Technology, 2020, 17(3): 376-383.

Citation:

Jiang Jisong, Jiang Aimin. The Influence of Image Rotation on Accuracy of Stabilization System of AIMS Solar Telescope[J]. Astronomical Research and Technology, 2020, 17(3): 376-383.

Citation:

Jiang Jisong, Jiang Aimin. The Influence of Image Rotation on Accuracy of Stabilization System of AIMS Solar Telescope[J]. Astronomical Research and Technology, 2020, 17(3): 376-383.

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The Influence of Image Rotation on Accuracy of Stabilization System of AIMS Solar Telescope

Jiang Jisong^1,2,3,
Jiang Aimin^1,2,3

1. National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100101, China;
2. Key Laboratory of Space Astronomy and Technology, Chinese Academy of Sciences, Beijing 100101, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China

More Information

Received Date: January 02, 2020
Revised Date: January 23, 2020
Available Online: November 20, 2023

Graphical Abstract

Abstract

Abstract

Aiming at the phenomenon of image rotation when the coude system of AIMS solar telescope tracks the targets, the influence of image rotation on the correction accuracy of image stabilization system is studied. Firstly, the calculation error caused by the image rotation of the covariance function in Fourier domain and the absolute difference function at different atmospheric turbulence intensity and different detection window sizes is theoretically analyzed. Then, the dynamic optical model of AIMS solar telescope is established in the optical analysis software ASAP. The imaging shift and rotation by the coude system error in the real-time tracking of the sun's motion are calculated. The maximum shift and rotation of the image within half an hour are about 0.3 mm and 200″ respectively. The results show that under the existing error distribution situation, the image rotation caused by the assembly error has little effect on the image stabilization accuracy. In addition, in order to obtain higher image stabilization accuracy, the covariance function in Fourier domain is the preferred image stabilization algorithm. And the detection window with 128×128 pixels should be selected as far as the hardware processing speed allows.
- Image rotation,
- Solar telescope,
- Axis error,
- Image stabilization system

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References (12)

References

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