| 摘要 |
The invention relates to a method and system for retrieving location data of an object, the location data being representative of position, velocity and time. The method comprises the step of providing a signals-in-space receiver to the object. The receiver comprises an antenna for receiving an encrypted navigation signal, an A/D converter for discretizing the encrypted navigation signal into encrypted navigation data, a memory unit for storing the encrypted navigation data and an interface for connecting a reader to the memory unit. The method comprises the steps of receiving the encrypted navigation signal by the antenna and discretizing the encrypted navigation signal into encrypted navigation data. The method comprises the step of storing the encrypted navigation data in the memory unit and connecting the reader with the memory unit for transferring the encrypted navigation data from the memory unit to the reader and the step of decrypting in the reader the encrypted navigation data and retrieving the location data of the object. |
