公开(公告)号：US09933519B2

公开(公告)日：2018-04-03

申请号：US14658619

申请日：2015-03-16

Applicant: ELBIT SYSTEMS LTD.

Inventor： Hans Martin Braun ,  Gadi Maydan ,  Holger Baessler ,  Carston Jonas ,  Ofer Klein

IPC: G01S13/02 ,  G01S13/89 ,  G01S13/94 ,  G01S7/298 ,  G01S13/524 ,  G01S13/90 ,  G01S7/28 ,  G01S7/02

CPC classification number: G01S13/89 ,  G01S7/2806 ,  G01S7/298 ,  G01S13/5242 ,  G01S13/9023 ,  G01S13/94 ,  G01S2007/027 ,  G01S2013/9082

Abstract: A system and a method of generating a three-dimensional terrain model using one-dimensional interferometry of a rotating radar unit is provided herein. Height information is evaluated from phase differences between two echoes by applying a Kalman filter in relation to a phase confidence map that is generated from phase forward projections relating to formerly analyzed phase data. The radar system starts from a flat earth model and gathers height information of the actual terrain as the platform approaches it. Height ambiguities are corrected by removing redundant 2π multiples from the unwrapped phase difference between the echoes.