Satellites Galore! What We Launch Into Space and GPS Modernization

Today there are hundreds of satellites orbiting Earth.  A portion of those are Global Navigation Satellite Systems (GNSS) like GPS (USA), GLONASS (Russia), Galileo (European Union), and COMPASS or BeiDou (China).  But there are many other reasons governments and commercial interests want to put birds in the sky: imagery capture, communications, television broadcasting, weather monitoring, intelligence […]