A pre-processing procedure is designed for a space-surface bistatic synthetic aperture radar(SS-BSAR)system when a time domain image formation algorithm is employed.Three crucial technical issues relating to the proce...A pre-processing procedure is designed for a space-surface bistatic synthetic aperture radar(SS-BSAR)system when a time domain image formation algorithm is employed.Three crucial technical issues relating to the procedure are fully discussed.Firstly,unlike image formation algorithms operating in the frequency domain,a time domain algorithm requires the accurate global navigation satellite system(GNSS)time and position.This paper proposes acquisition of this information using a time-and-spatial transfer with precise ephemeris and interpolation.Secondly,synchronization errors and compensation methods in SS-BSAR are analyzed.Finally,taking the non-ideal factors in the echo and the compatibility of image formation algorithms into account,a matched filter based on the minimum delay is constructed.Experimental result using real data suggest the pre-processing is functioning properly.展开更多
基金supported by the Electro-Magnetic Remote Sensing Defence Technology Centre(EMRS-DTC)of the UK Ministry of Defence(EMRS/DTC/1/27)the China Scholarship Council(2009611064)the Program for New Century Excellent Talents in University(NCET-07-0223)
文摘A pre-processing procedure is designed for a space-surface bistatic synthetic aperture radar(SS-BSAR)system when a time domain image formation algorithm is employed.Three crucial technical issues relating to the procedure are fully discussed.Firstly,unlike image formation algorithms operating in the frequency domain,a time domain algorithm requires the accurate global navigation satellite system(GNSS)time and position.This paper proposes acquisition of this information using a time-and-spatial transfer with precise ephemeris and interpolation.Secondly,synchronization errors and compensation methods in SS-BSAR are analyzed.Finally,taking the non-ideal factors in the echo and the compatibility of image formation algorithms into account,a matched filter based on the minimum delay is constructed.Experimental result using real data suggest the pre-processing is functioning properly.
