#

The satellite 1 is at distance d sub 1 from the location of the automobile at (x sub 1, y sub 1, z sub 1). The satellite 2 is at distance d sub 2 from the location of the automobile at (x sub 2, y sub 2, z sub 2). The satellite 3 is at distance d sub 1 from the location of the automobile at (x sub 3, y sub 3, z sub 3). The satellite 4 is at distance d sub 4 from the location of the automobile at (x sub 4 y sub 4, z sub 4). The time delay is shown with receiver code and satellite code.