Fig. 3
From: Imaging spectroscopy of solar radio burst fine structures
Centroid locations of the fundamental (F; red) and harmonic (H; blue) sources for 32.5 MHz as a function of time, determined using a two-dimensional Gaussian fit to each observed source. Darker colors correspond to later times, as shown in the color scale in the insert. Straight-line fits to the positions of each centroid are shown by the arrows. The time elapsed is measured as time after the flux peak; 11:56:57.6 UT for fundamental and 11:57:01 UT for harmonic (Fig. 4). The full solar disk shows clearly that the F source is displaced radially outwards. The error bars represent one standard deviation of uncertainty. The uncertainties of the source position were determined by the 2D Gaussian fit (see Methods)
