Fig. 7

ARTEMIS/SAO high resolution (10 ms) dynamic spectra of drifting narrow-band structures. a) Spikes with different values of drift rates: positive, negative; and unmeasurable. b) Spikes with negative drifts; c) spikes with positive drifts; and d) spikes with unmeasurable drift rate. Plots in d) are spectral cuts along the lines marked in the dynamic spectrum.
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