Comparison of real and simulated images for six channels of AIA (3 left columns) and HRI_EUV (bottom right panel) registered on 30 May, 2020. The DEM is obtained using simultaneous AIA and HRI_EUV data. In the top row, the images represent 193 Å, 211 Å, and 335 Å channels (from left to right), and those in the bottom row represent the AIA 94 Å, 131 Å, and 171 Å channels and HRI_EUV (from left to right). The FOV of these images is shown in Fig. 1. Each panel is actually split into two parts along the diagonal, showing the simulated image (top left part) and the real image (bottom right part). For the HRI_EUV data, an additional cross-calibration factor k = 1.6 was introduced.