基于运动参数估计的SAR成像-电子学报.PDF

12A Vol. 29 No. 12A 2001 12 ACTA ELECTR NICA SINICA Dec. 2001 SAR 邢孟道,保 铮 ( , 710071) : SAR ,. . ,. , . ., , , . : ; ; ; : TN957 : A : ( 2001) 12A182405 Motion Parameter Estimation Based SAR Imaging XINGMengdao,BA Zheng ( Key Laboratoryf or Radar Signal Process ing , X idian University , X i an, Shaanx i 710071, China) Abstract : Motion compensation isthe key step of SAR imaging,especially for high resolution SAR imaging.The motion param eter can be measured by navigational instrument, and also can be estimated from data. These two methods usually need to be com bined.Although there are many studies about motion parameter estimation,and many estimation and compensation methods have been proposed,how to select a proper method according to real situation is still problem.This paper proposes algorithms for estimating the motion parameter and SAR imaging for a given radar and motion state,which can obtain a good SAR imagewith reduced computation load. Key words: SAR; Doppler centroid; Doppler rate;Chirp Scaling 1 294 ., ,SAR ISAR 294 . , , 315km ., . SAR . SAR , 70MHz , , 147c 2B = 315m( c ) , ,SAR , c INSGPS , , 317m. ,( IMU) ( 15 , ) , , 1100m, 1100m , ,. , D a 2= 06m( , , X ) ., , , ( ) ,