Methods and systems are provided for use of a windshield wiper fluid having a reformulated composition including one or more non-ionic surfactants. Once the hinge and aligning plates are factory set in position, with tight tolerances between fasteners and holes in the aligning plate, the aligning plate is separately fixed to the hinge plate. An algebraic solution to intersection of the line with the reference ellipsoid is used to determine the coordinates of the point of intersection, which in turn are used to determine the geodetic latitude and altitude of the given point.