METHODS AND SYSTEMS FOR ENHANCED NAVIGATIONAL PERFORMANCE

摘要

Methods and systems for navigation are disclosed. In one embodiment, data fr om GPS satellites within a field of view of a ground station are retransmitted to LEO satellites, such as Iridium satellites, and cross-linked if necessary before being transmitted to a user. The user is then able to combine the fed - forward data with data received directly from GPS satellites in order to resolve errors due to interference or jamming. Alternately, a method include s receiving at least one carrier signal at a user device, each carrier signal being transmitted by a distinct LEO satellite. The user device processes the carrier signals to obtain a first carrier phase information. The user device recalls an inertial position fix derived at an inertial reference unit. The user device derives a position of the user device based on the inertial position fix and the first carrier phase information.