Signal in Space (SiS)

Signal in Space (SiS) refers to the radio signals transmitted by satellite navigation systems, such as GPS, GLONASS, or Galileo, to provide positioning and timing information. These signals are broadcast from satellites orbiting the Earth and carry data that allows receivers on the ground to determine their precise location, speed, and time. SiS is crucial for navigation, mapping, and timing services, enabling devices like smartphones, navigation systems, and autonomous vehicles to operate accurately. Essentially, SiS is the invisible communication link between satellites and users that makes reliable global positioning possible.