Speaking of which, with a tip of the hat to Jeff Liebermann for finding this. The Origins of GPS: <http://www.gpsworld.com/gnss-system/gps-modernization/the-origins-gps-part-1-9890> <http://www.gpsworld.com/gnss-system/gps-modernization/the-origins-gps-part-2-fighting-survive-10010> Jeff-1.0 wa6fwi