Global positioning system (GPS) receiver being held in a hand. The system utilizes a network of satellites that orbit the Earth. Each of these sends out signals about its position and the time. By using the signals,the receiver can calculate its latitude,longitude & altitude,as well as the local time. Photographed in Greenland | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Fraser, Simon |
Bildgröße: | 3030 px × 4610 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |