Base site and method for GPS-based regional time synchronization

To address the need for an apparatus and method of economically synchronizing base sites in wireless communication systems, the present invention provides a GPS-based solution for synchronizing slave sites to a regional master site. In general, the master site reports to the slave sites information indicating the timing variance of GPS satellites. The slave sites then use this information in combination with information they collect from the same satellites to periodically resynchronize their clocks to the master clock.