Global positioning system (GPS) receiver in a hand. The system uses a network of GPS satellites,each of which sends out signals about its position and the time. By using the signals from the satellites,the receiver calculates and displays its latitude,longitude and altitude,as well as the local time | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Donne, Michael |
Taille de l’image : | 2704 px × 4064 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |