Automatic recognition of type III solar radio bursts: Automated Radio Burst Identification System method and first observations

Abstract

[1] Because of the rapidly increasing role of technology, including complicated electronic systems, spacecraft, etc., modern society has become more vulnerable to a set of extraterrestrial influences (space weather) and requires continuous observation and forecasts of space weather. The major space weather events like solar flares and coronal mass ejections are usually accompanied by solar radio bursts, which can be used for a real-time space weather forecast. Coronal type III radio bursts are produced near the local electron plasma frequency and near its harmonic by fast electrons ejected from the solar active regions and moving through the corona and solar wind. These bursts have dynamic spectra with frequency rapidly falling with time, the typical duration of the coronal burst being about 1 --3 s. This paper presents a new method developed to detect coronal type III bursts automatically and its implementation in a new Automated Radio Burst Identification System. The central idea of the implementation is to use the Radon transform for more objective detection of the bursts as approximately straight lines in dynamic spectra. Preliminary tests of the method with the use of the spectra obtained during 13 days show that the performance of the current implementation is quite high, $84%, while no false positives are observed and 23 events not listed previously are found. Prospects for improvements are discussed. The first automatically detected coronal type III radio bursts are presented.

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“…Building on this, recent work at the University of Sydney has led to improved models of solar type II burst emissions [e.g., Knock and Cairns, 2005] and to an improved analysis of solar spectrograph data [Lobzin et al, 2008[Lobzin et al, , 2009] that offers new insights into the origins and speeds of solar wind disturbances. This research is aided by monitoring solar radio emissions associated with shock waves traveling in the solar wind, which will potentially make it possible to track events moving outward through the solar wind toward the Earth.…”

Studying Sun–Planet Connections Using the Heliophysics Integrated Observatory (HELIO)

“…This is aimed at providing more detailed information when searching for instruments that may have observed a particular event. Finally, data mining on in situ measurements is Lobzin et al (2009) offered through AMDA, while large processing capabilities and storage resources are provided by Grid-Ireland. 8 A brief description of the event and feature catalogues, as well as the data provider service is presented.…”

Comparison of the Radio Frequency Interference (RFI) in the Region of Solar Burst Type III Data at Selected CALLISTO Network

“…This is important because radio waves at the meter and decimeter waves can be used as a diagnostics of the solar processes [7]. Meanwhile, solar space weather events like coronal mass ejections and solar flares are usually accompanied by solar radio bursts, which can be used for a low-cost real-time space weather monitoring [8]. Unfortunately, the flux density of low-frequency radio bursts has rarely been observed over a large range of frequency [9].…”