Chinese Space Science and Technology ›› 2018, Vol. 38 ›› Issue (2): 71-76.doi: 10.16708/j.cnki.1000-758X.2018.0008

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An elevation reconstruction method of multi-channel InSAR based on optimal estimation of common remainder#br#

WANG Siyu1, CHEN Lifu1,*, YUAN Zhihui1, XING Xuemin2, MAO Yongfei3, WU Hong1   

  1. 1. School of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha 410004, China
    2. School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410004, China
    3. Beijing Institude of Spacecraft System Engineering, Beijing 100094, China
  • Received:2017-06-13 Accepted:2018-01-15 Online:2018-03-25 Published:2020-02-12

Abstract: To improve computational efficiency of multichannel InSAR elevation reconstruction, a rapid elevation reconstruction method based on the optimal estimation of remainder was proposed. Firstly, after the removal of the flat-earth effect, the wrapped interferometric phase of each pixel was drawn and congruence equations of interferometric phase fuzzy number were constructed. Secondly, the optimal estimation method was used to solve the optimal estimation of the common remainder with noise, and the elevation of each target was solved. Finally, the improved method was used to get higher precision reconstruction results. Experimental results show that the algorithm significantly improves the computational efficiencyof multichannel InSAR elevationre construction.

Key words: Chinese remainder theorem, interferometric synthetic aperture rada (InSAR), optimal estimation, elevation reconstruction, execution efficiency