Second Dimension of Time: Simultaneity

The first Temporal Dimension, corresponding to Spatial Length, is Time-Lapse, though commonly referred to as simply 'Time' in 1-Dimensional concepts. The second, the Temporal correlate of Width, is Simultaneity.  Though not recognized as such in the standard 1-D concept, Simultaneity is essential to all operations in Modern Physics.  For, it is presupposed in any measurement of Time, i. e. which requires a Velocity common to the motion of an object of measurement, and that of the measuring device.  Otherwise, the relative Dilation that is established as occuring at high velocities, e. g. between two clocks, similarly distorts the operation.  Nevertheless, the presupposition is not incorporated into the standard concept as a second Dimension.