南京航空航天大学学报（英文版）2025，Vol.42Issue(4)：487-496,10.DOI:10.16356/j.1005-1120.2025.04.005
涪城一号SAR卫星高分辨率稀疏成像及多普勒参数估计
High Resolution Sparse Imaging and Doppler Parameter Estimation of Fucheng-1 SAR Satellite
摘要
Abstract
In recent years,the development of domestic commercial synthetic aperture radar(SAR)is in full swing,with multiple commercial SAR satellites in orbit,showing great potential in disaster monitoring,natural resource management and deformation observation.Fucheng-1 is the first C-band commercial SAR satellite for interferometric SAR(InSAR)service developed by Spacety China,which marks the gradual maturity of China's remote sensing data service.Based on the raw data collected by Fucheng-1,this paper firstly introduces the range-Doppler algorithm(RDA),then illustrates the parameter estimation method on the basis of fractional Fourier transform(FrFT)to realize the accurate estimation of azimuth chirp rate,which effectively improves imaging quality.Finally,the L1-norm regularization based sparse imaging method is utilized to reconstruct images from down-sampled data.Experimental results show that the sparse imaging algorithm can accurately reconstruct the down-sampled Fucheng-1 data and suppress sidelobes and clutter.关键词
涪城一号/合成孔径雷达/稀疏合成孔径雷达成像/参数估计Key words
Fucheng-1/synthetic aperture radar(SAR)/sparse SAR imaging/parameter estimation分类
信息技术与安全科学引用本文复制引用
蔡辅轩,朱子逸,宋宇凡,毕辉..涪城一号SAR卫星高分辨率稀疏成像及多普勒参数估计[J].南京航空航天大学学报（英文版）,2025,42(4):487-496,10.基金项目
The authors would like to thank the Spacety China for providing the Fucheng-1 SAR echo data-set.This work was supported in part by the National Natural Science Foundation of China(No.62271248),the Natural Science Foundation of Jiangsu Province(No.BK20230090),and the Key Laboratory of Land Satellite Remote Sensing Application through the Ministry of Natural Resources of China(No.KLSMNR-K202303). （No.62271248）
