This is not actually a new skill, but an alternate use for the Weavesight skill. With the Sense Residue feat, a channeler may, with a successful Weavesight skill check, recreate a gateway to the same location to which another channeler has just gone. The channeler must still cast the Create Gateway weave himself in order to open it. Furthermore, with a successful concentration roll (DC of 20 + casting level of the weave) the channeler may alter the destination so as not to appear at the exact location. Use the grenade chart (pg. 152 of the WoT Rulebook) to determine direction and 2d100 (percentile) to determine distance from the original destination of the gateway in feet.