Tag Archives: Satellite Navigation

An illustration (not to scale) depicting over two dozen GPS satellites orbiting approximately 12,500 miles (20,000 kilometers) above the Earth's surface, with an orbital tilt of about 55°. The system is designed to ensure that at least four satellites are visible, positioned at least 15° above the horizon, anywhere in the world at any given time.
1973: The Evolution and Impact of the Global Positioning System (GPS)

GPS, initially a military technology, has evolved into a critical global tool for navigation, communication, and scientific research, with widespread civilian and commercial applications