Design of Dual-channel Spectrum Observation System Based on LabVIEW

Subjects: Astronomy >> Astrophysical processes submitted time 2023-12-06 Cooperative journals: 《天文研究与技术》

Liu Kaijing Dong Lang Gao Guannan Zhou Jinzhi Yang Fenghui

Abstract： Solar eruptions are important manifestations of solar activity, including solar flares and coronal mass ejections (CMEs). They can potentially impact satellite communications and navigation systems, ground power grid systems, and the human living environment. Monitoring and studying solar radio bursts not only enable the prediction of space weather but also serve as a research tool in solar physics. This article introduces a dual-channel high-speed solar radio frequency spectrum observation system designed and developed based on the LabVIEW platform. It aims to monitor solar radio bursts, which are characterized by their randomness, short duration, and rapid changes. The system utilizes a high-speed signal acquisition card with a sampling rate of 1.5GS/s, providing a time resolution of up to 4ms and a frequency resolution of 45.7764 kHz. The acquired signals are processed through FFT power spectrum analysis and displayed as frequency spectra and waterfall plots. The system extracts information such as the frequency, intensity, and duration of solar radio bursts. The observed data is uploaded to a server using the FTP file transfer protocol, optimizing storage resources and facilitating data sharing. This integrated system is specifically applied to analyze signals in the frequency range from 70 MHz to 700 MHz output by the 11-meter solar radio telescope at Chengjiang Fuxian Lake Observatory.

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