On-disk coronal condensation observed by AIA. (a) 211 Å, (b) 193 Å, (c) 171 Å, (d) 131 Å, and (e) 304 Å images. The green dashed ellipses in panels a and b mark the location of the condensation; the red dots in panels c and d denote the location of a magetic dip region. (f) Normalized light curves of the AIA 211 Å (purple), 193 Å (green), 171 Å (brown), 131 Å (cyan), and 304 Å (gray) channels in the red box shown in panel d. (g) Space-time diagrams of AIA 193 Å and 171 Å intensities for the trajectory “S2” shown in panel c. The white dotted line in panel g1 represents a parabolic fit to the track of one coronal rain flow, and the red dashed lines indicate the dip region. An animation of this figure is available online.