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13 December 2020 Automatic data processing pipeline for 19-beam HI observation of FAST
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Abstract
In the field of radio astronomy, the 21cm absorption line of HI is an important way to explore the large-scale structure and evolution history of the universe. The working frequency of FAST's 19 beam receiver is 1.05GHz to 1.45GHz, and the main observation object is to conduct an accurate and rapid intensity mapping survey of extragalactic HI’s signal. Aiming at the 21cm spectral line of the object, we designed a parallel data processing platform to mitigate the influence of foreground, instrument, radio frequency, standing wave and other noises on the spectral data, then generate the image data of the whole sky region. At present, we divide the process into flux calibration, bandpass and baseline correction, radio frequency interference marking and data gridding work, etc. The whole project was programmed in Python, and Cython was used for some projects to speed things up.
Conference Presentation
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Zhi-yue Wang, Yu-tong Zhao, Ming-hao Jia, Guang-yu Zhang, Feng-xin Jiang, Jian Wang, Bo Zhang, and Ming Zhu "Automatic data processing pipeline for 19-beam HI observation of FAST", Proc. SPIE 11452, Software and Cyberinfrastructure for Astronomy VI, 1145212 (13 December 2020); https://doi.org/10.1117/12.2560782
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KEYWORDS
Data processing

Receivers

Detection and tracking algorithms

Electromagnetic coupling

Calibration

Data conversion

Telescopes

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