Yu Jianghong: the world's four major satellite positioning navigation system, one is the U.S. GPS, EU's main Galileo, Russian GLONASS (GLONASS), the recent media attention is the independent intellectual property rights of our country Beidou...英国华人论坛
Since the early 1990s the Global Positioning system (GPS) has been the worlds only fully functioning Global Navigational Satellite System (GNSS). Run by the American military, GPS (sometimes referred to as NAVSTAR) has allowed accurate t...英国华人论坛
But he didnt just observe and note new objects in the sky. He applied scientific methods, mathematical laws, and logical thinking to what he observed and it is this cross discipline approach that created the modern science of observational...英国华人论坛