GNSS broadcast of future navigation data for anti-jamming

摘要

A system and a method wherein future navigation data is broadcast on one channel and current navigation data is broadcast on another channel. By instituting minor changes in message structure, anti-jamming capability can be enhanced. In accordance with one method, future navigation data is distributed by satellites to receivers for tracking of a conventional channel. In accordance with another method, part of the future navigation data (i.e., ephemeris and clock data) is distributed by satellites to receivers for use with a dataless channel.