Distributed Satellites SAR High Range Resolution Imaging Using Spectral Synthesis

Different data sets relative to the same scene acquired with different view angles can be exploited to improve slant-range resolution of SAR in broadside mode. Distributed satellites SAR is a special kind of SAR system, whose transmitters and receivers are placed separately and work in different mode (broadside mode and squint mode). In this paper, data sets acquired from distributed satellites SAR system is discussed. It points out that, different angles between the radar Line Of Sight (LOS) and the satellites vertical orbital plane correspond to different bands of the ground reflectivitys spectrum. Therefore, the range resolution can be improved by using combined spectra. In addition, the influence of distributed satellites SAR systems parameters on spectral synthesis is also discussed.