Right here we launch the spectral knowledge of photo voltaic radio bursts recorded by the Chashan Broadband Photo voltaic radio spectrograph (CBSm), positioned within the Chashan mountain (E122°.30, N36°.84) that’s the southern tip of Shandong Peninsula of China.
CBSm is supported by the Chinese language Meridian Area Climate Monitoring Venture (II) and Shandong College. It’s designed and operated by the Laboratory for ElectromAgnetic Detection of Institute of Area Sciences (LEAD, ISS), Shandong College.
CBSm observes the Solar from 90 to 600 MHz with a 12m parabolic antenna fed by a dual-polarization LPDA feed. Its receiver adopts a high-speed two-channel 14-bit ADC acquisition card, with a sampling charge of 1.25 GSPS. The CBSm receiver implements a 16k-point FFT algorithm with FPGA KU115. The default frequency and temporal resolutions are 76.294 kHz and 0.839 ms (as much as 0.21 ms), respectively. The noise coefficient of the system is lower than 1 dB, the dynamic vary is greater than 60 dB, and the sensitivity is as excessive as 1 SFU that’s estimated for integration inside 1ms and a bandwidth of 100 kHz at 300 MHz. The principle function of CBSm is to report ultra-fine spectral constructions of metric photo voltaic radio bursts.
The CBSm began its routine commentary since Nov. 2022. It has recorded many radio bursts, together with sort I bursts which will final for weeks, lots of of sort IIIs, tens of sort II and IV bursts, regardless of relatively-strong radio interference.
Under we introduced a photograph of the 12m antenna and two examples of the CBSm knowledge.
Determine 1: The Chashan Broadband Photo voltaic radio spectrograph (CBSm), positioned within the Chashan mountain (E122°.30, N36°.84) that’s the southern tip of Shandong Peninsula of China.
Determine 2: Two examples of the CBSm bursts noticed on Could 8 2023 and the identical date in 2024.
The info of the CBSm sort II bursts along with some intriguing bursts with tremendous spectral constructions could be discovered through the web site (http://47.104.87.104/SRData/CBSm/RadioBurstEvent/typeII/typeIIburst_show.html). These spectrographs are given by the information built-in over 100 ms and 610kHz for a greater signal-noise ratio. We’re working to calibrate these knowledge in each flux densities and ranges of polarization. The every day spectra knowledge could be considered on-line at http://47.104.87.104/ SRData/CBSm/dailyView/ and/or http://47.104.87.104/ SRData/CBSm/dailyFits/.
The introduction to CBSm could be discovered on-line at https://iopscience.iop.org/article/10.3847/1538-4365/ad3de7. Please contact Dr. Yao CHEN (the chief scientist of the Chashan Photo voltaic Observatory) at yaochen@sdu.edu.cn for collaborations in scientific analysis on photo voltaic radio bursts. For the high-resolution knowledge of the bursts or different inquiries, please contact Dr. Bing Wang at wbing@sdu.edu.cn.
