Navigator alignment using radar scan

摘要

The various technologies presented herein relate to the determination of and correction of heading error of platform. Knowledge of at least one of a maximum Doppler frequency or a minimum Doppler bandwidth pertaining to a plurality of radar echoes can be utilized to facilitate correction of the heading error. Heading error can occur as a result of component drift. In an ideal situation, a boresight direction of an antenna or the front of an aircraft will have associated therewith at least one of a maximum Doppler frequency or a minimum Doppler bandwidth. As the boresight direction of the antenna strays from a direction of travel at least one of the maximum Doppler frequency or a minimum Doppler bandwidth will shift away, either left or right, from the ideal situation.

主权项

1. A radar system located on an aircraft comprising:
a navigator component configured to:
determine Doppler frequencies and Doppler bandwidths in a plurality of radar echoes, the plurality of radar echoes collected during a scan of an antenna of the radar system;identify at least one of a Doppler frequency or a Doppler bandwidth in the Doppler frequencies and the Doppler bandwidths;identify an orientation of the antenna that corresponds to the at least one of the Doppler frequency or the Doppler bandwidth; andcorrect a heading error of the aircraft based on the orientation of the antenna.