Fig. 6.
Left column: original SAO dynamic spectrum and 1D Nançay EW images (scans) as a function of time for Interval 1. Middle: corresponding filtered images; in the top row the dynamic spectrum has been filtered in both time and frequency, in the others in time only. Right: average NRH images with the same orientation as the 1D images (west limb up). Dashed horizontal lines in the spectra mark the NRH frequencies.
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