Welcome to Journal of University of Chinese Academy of Sciences,Today is

›› 2015, Vol. 32 ›› Issue (6): 783-789.DOI: 10.7523/j.issn.2095-6134.2015.06.009

Previous Articles     Next Articles

System parameter estimation for airborne interferometric synthetic aperture radar with three-baseline

MA Meng1,2, LI Daojing1, PAN Zhouhao3, DU Jianbo1,2   

  1. 1. Science and Technology on Microwave Imaging Laboratory, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. China Academy of Electronics and Information Technology, Beijing 100041, China
  • Received:2014-12-05 Revised:2015-04-24 Online:2015-11-15

Abstract:

This work investigated the parameter estimation problem for airborne interferometric synthetic aperture radar with rigid three-baseline. The considered system parameters are baseline orientation angle and interferometric phase offsets. So the least number of ground control points can be reduced to two. The effect of phase noise on the estimation accuracy is analyzed and a novel method called three-baseline union parameter estimation is proposed. The proposed method employed Newton optimal algorithm to solve the nonlinear estimation equations and used weighting process to deal with elevation accuracy difference of each baseline. Elevation difference between any two baselines is used to evaluate the efficiency of parameter estimation method. Simulation results indicate that the proposed method can obtain higher estimation accuracy than the conventional single baseline parameter estimation method.

Key words: interferometric synthetic aperture radar, system parameter estimation, airborne three-baseline

CLC Number: