Cross-Range Calibration of Interferometric ISAR under a Condition of Phase Ambiguity
The cross-range measurement of a target from Interferometric ISAR (InlSAR) can usually be obtained from the interferometric phase of echo.However,the phase which has been received is often ambiguous and the reference point on the target used for phase unwrapping with determined location does not really exist,as a result of which,the accurate value of interferometric phase can not be got easily.By deriving the relationship between interferometric phase and cross-range measurement of InlSAR image,a method of cross-range calibration under a condition of ambiguous phase is proposed in this paper,using phase difference between adjacent scatters of the same range cell.In addition,equivalent phase compensation for scatters in different range cells ensures that the interferometric phase information of each strong scatter can be fully used during calibration,which can greatly reduce the influence of noise. The simulation result shows the effectiveness of the method.
InlSAR interferometric phase cross-range calibration linear fitting
Mu Ling Weiming Yuan Wenge Xing
Nanjing Research Institute of Electronics Technology,China
国际会议
2009 2nd Asian-Pacific Conference on Synthetic Aperture Radar(第二届亚太合成孔径雷达会议)
西安
英文
903-906
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）