Stacked imaging functions produced using the full array of 129 stations. P → S imaging function is shown on the left-hand side and S → P imaging function is shown on the right-hand side. In the left-hand panel, green stars show the locations of sources dipping +45°, and in the right panel, purple stars show the locations of sources dipping +75° and green stars show the locations of sources dipping −75°. Note that some symbols overlap due to close proximity of sources.