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