Example DEM from zeroth-order regularization of simulated SDO/AIA from a two Gaussian model. (Left) DEM space, (middle) observable space and residuals (right) RλK used to calculate the temperature resolution. Also plotted is the solution from xrt_dem_iterative2.pro (grey histogram, left panel) and the EM loci curves (purple lines, left panel). Note that the solution here is positive without the additional constraint.
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