US 6,983,160 B2
Base site and method for GPS-based regional time synchronization
Bruce M. Drawert, Arlington Heights, Ill. (US)
Assigned to Motorola, Inc., Schaumburg, Ill. (US)
Filed on Oct. 25, 2001, as Appl. No. 10/2,727.
Prior Publication US 2003/0083103 A1, May 01, 2003
Int. Cl. H04B 15/00 (2006.01)
U.S. Cl. 455—502 18 Claims
OG exemplary drawing
 
1. A method for GPS-based regional time synchronization comprising:
receiving, at a master site, information from a GPS satellite that indicates a position of the satellite and a satellite time-of-day;
determining, using the position of the satellite and a pre-determined position of the master site, a time-of-day error value that represents a difference between the satellite time-of-day, adjusted for a transit time of the information, and a corresponding master site time-of-day as reported by a master site, nanosecond-accurate clock; and
broadcasting to at least one slave site an indication of the time-of-day error value and the corresponding master site time-of-day.