Periodogram Analysis on Solar Activities Based on El Campo Solar Radar Observation Data

Solar radar can transmit radar waves toward the Sun actively at a specific waveband and receive the reflected waves. By analyzing the echoes, we can obtain the information of motion, magnetic field, and other properties of the solar atmosphere. The El Campo solar radar has done regular observations...

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Bibliographic Details
Published in:Chinese astronomy and astrophysics 2016-10, Vol.40 (4), p.524-539
Main Authors: Lin, Ye, Zhi-ning, Qu, Min, Wang, Guan-nan, Gao, Jun, Lin, Zhi-chun, Duan
Format: Article
Language:English
Subjects:
Algorithms
Astronomy
Magnetic fields
method: Lomb–Scargle periodogram algorithm
Radar
Radar cross sections
Solar activity
Solar atmosphere
Solar corona
Sun: activity
Sun: coronal mass ejection
techniques: radar astronomy
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Summary:Solar radar can transmit radar waves toward the Sun actively at a specific waveband and receive the reflected waves. By analyzing the echoes, we can obtain the information of motion, magnetic field, and other properties of the solar atmosphere. The El Campo solar radar has done regular observations on the solar corona for 8 years from 1961 to 1969, to trace the variation of solar activities. We have made a periodicity analysis on the obtained data with the Lomb-Scargle periodogram algorithm, and found that there are the 200 day and 540 day periods existed in the variation of the measured solar radar cross section. In addition, we have selected the larger radar cross sections (≥ 20σ⊙) to compare with the Dst indexes. Finally, we have summarized the El Campo solar radar experiment and give a prospect for the future development of the solar radar observation.
ISSN:0275-1062
1879-128X
DOI:10.1016/j.chinastron.2016.10.009