Measurement of NSRT 26m Antenna Track Unevenness and Influence on Pointing Accuracy

Wen Haoxing; Xu Qian; Wang Na

Astronomical Research and Technology > 2019 > 16(2): 158-166.

Wen Haoxing, Xu Qian, Wang Na. Measurement of NSRT 26m Antenna Track Unevenness and Influence on Pointing Accuracy[J]. Astronomical Research and Technology, 2019, 16(2): 158-166.

Citation:

Wen Haoxing, Xu Qian, Wang Na. Measurement of NSRT 26m Antenna Track Unevenness and Influence on Pointing Accuracy[J]. Astronomical Research and Technology, 2019, 16(2): 158-166.

Citation:

Wen Haoxing, Xu Qian, Wang Na. Measurement of NSRT 26m Antenna Track Unevenness and Influence on Pointing Accuracy[J]. Astronomical Research and Technology, 2019, 16(2): 158-166.

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Measurement of NSRT 26m Antenna Track Unevenness and Influence on Pointing Accuracy

Wen Haoxing^1,2,3,
Xu Qian^1,2,
Wang Na^1,2

1. XinJiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, China;
2. Key Laboratory of Radio Astronomy, Chinese Academy of Sciences, Nanjing 210008, China;
3. University of Chinese Academy of Sciences, Beijing 100049, China

More Information

Received Date: April 15, 2018
Revised Date: May 04, 2018
Available Online: November 20, 2023

Graphical Abstract

Abstract

Abstract

The track of wheel on track antenna is the important foundation which carries the whole antenna weight; its precision directly influences the operation of the antenna in azimuth direction stability, causing the shafting error and finally influences the antenna pointing accuracy. This paper introduces the reconstructed Nanshan Radio Telescope (NSRT) 26m antenna track structure and track unevenness measurement, and establishes the mathematical model of antenna pointing error caused by the track unevenness of the antenna under different azimuth and elevation angle. The cross scanning method is used to measure the pointing data of multiple standard radio sources in corresponding positions, and the pointing error is obtained through Gauss fitting method. Through analysis, we can see that the pointing error caused by track unevenness is corrected, and the antenna pointing accuracy can be improved.
- Track unevenness,
- NSRT,
- Continuous track,
- Cross scanning,
- Pointing error

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References (11)

References

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