Codeless GPS Positioning

The Global Positioning System (GPS) offers significant promise for applications to positioning needs but the often stated DoD policy (i.e., W.H. Taft, IV, 22 May 1985) makes it clear that the operational (Block II) phase of GPS will not be as openly available as the current prototype (Block I) satellites. Thus, user organizations and manufacturers of GPS code-dependent equipment have invested substantial efforts aimed at changing that established DoD policy so that their GPS equipment will function in the future as well as they presently perform.