Each location in spacetime is marked by four numbers defined by a: the position in space, and the time (which can be visualized as the reading of a clock located at each position in space). Mitsubishi Pajero Nw Manual download. The 'observer' synchronizes the clocks according to their own reference frame. In special relativity, an observer will, in most cases, mean a frame of reference from which a set of objects or events are being measured. This usage differs significantly from the ordinary English meaning of the term. Audi S4 Avant Instruction Manual download.

Reference frames are inherently nonlocal constructs, and according to this usage of the term, it does not make sense to speak of an observer as having a location. In Fig. Honda Accord 1999 Uk Service Manual download free on this page.  1‑1, imagine that the frame under consideration is equipped with a dense lattice of clocks, synchronized within this reference frame, that extends indefinitely throughout the three dimensions of space. Any specific location within the lattice is not important. The latticework of clocks is used to determine the time and position of events taking place within the whole frame. The term observer refers to the entire ensemble of clocks associated with one inertial frame of reference. Freightliner Xc Owners Manual download there. : 17–22 In this idealized case, every point in space has a clock associated with it, and thus the clocks register each event instantly, with no time delay between an event and its recording.