Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1771781 | Chinese Astronomy and Astrophysics | 2015 | 14 Pages |
Abstract
The method to establish the pointing model of the 65-meter radio telescope of Shanghai Astronomical Observatory (TM65 m) is described. The single-point data are collected by means of “cross scan”, then, they are fitted with a model including both the Gaussian and nonlinear terms. It is also simulated and analyzed how the antenna beam is broadened in the scanning process because of the angular size of a source. And the orbit prediction of sources is used to improve the modelling efficiency. Finally, an eight-parameter pointing model is built after fitting all the collected single-point errors. It is verified that the model works well in the X band and other low-frequency bands, the pointing accuracy at the X band attains 12.36 arcsec.
Keywords
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Astronomy and Astrophysics
Authors
Yu Lin-feng, Wang Jin-qing, Zhao Rong-bing, Dong Jian, Zuo Xiu-ting, Gou Wei, Liu Qing-hui, Fan Qing-yuan,