The Eutelsat 117 West B satellite, also called SatMex 9, is one of three commercial geostationary satellites that constitute the space segment of WAAS. Credit: FAA Concept Fifty years since the ...

or dog collar to keep track of whereabouts afield. Regardless of how you enjoy the outdoors, like most hunters and anglers these days, you’ve probably tapped into the Global Positioning System in one ...