A mobile station that includes a display, data storage, and a processor. The present invention is directed to a particulate water absorbing agent having the following to : permeability potential under pressure being 50 to 100%; yellowness index being 0 to 10, and rate of change of yellowness index being 100 to 150% following a coloring acceleration test for 14 days at 70\xb11\xb0 C. An imaging plane perpendicular to the line intersecting the optic centers of the first image and the second image is then determined and used to generate a first rotation-cancelled image and a second rotation-cancelled image. An adjusted symbol timing can be established by adjusting the first symbol timing by the calculated timing adjustment amount.