Description: 342 communications: directive radio wave systems and devices (e.g., radar, radio navigation) / 342 communications: directive radio wave systems and devices (e.g., radar, radio navigation)/(350) directive (352) including a satellite (357.2) with position, velocity, or attitude determination (ipc) (357.39) satellite radio beacon positioning system transmitting time-stamped messages; e.g. gps [global positioning system], glonass [global orbiting navigation satellite system] or galileo (ipc) (357.51) receivers (ipc) (357.63) acquisition or tracking of signals transmitted by the system (ipc) (357.69) code related (ipc)
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