TRACKING TYPE III RADIO BURST SOURCES IN THE SOLAR CORONA BY HELIOGRAPHIC MEANS
DOI:
https://doi.org/10.18524/1810-4215.2014.27.81247Ключові слова:
Sun, radio emission, bursts, radio heliograph, UTR-2 radio telescopeАнотація
We present the preliminary results of heliographic measurements of solar type III radio bursts in the lowfrequency range (16.5-33 MHz) using the UTR-2 radio heliograph. The radio astronomy tools permit us to obtain two-dimensional spatial structures of burst sources in dependence of frequency and time. Each heliogram consists of 40 pixels (beams) as a result of the serial sweep in UV-plane wherein signals of each beam are recorded in a dynamic spectrum with both high temporal (~ 2.482 ms) and top spectral (~ 4 kHz) resolutions. The rate of output heliograph is one image per 3 seconds. Over a session in April, 2013 many type III radio and IIIb-III bursts were observed. On the heliograms the source motion direction in the upper corona is clearly detectable. The heliogram features are discussed.
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