Expert Opinion
GPS Does Need a Backup, Terrestrial Is the Answer – But Which Terrestrial?
A key effort to protecting America, and GPS by making it a much less attractive target, is to establish a terrestrial backup system.
Dana A. Goward
Mr. Dana A. Goward is President of the non-profit Resilient Navigation and Timing Foundation and a member of the President’s National Space-based Positioning, Navigation, and Timing Advisory Board.
