Analysis of the characteristics of squint circular scanning SAR and its imaging method

作者：Liao Yi^*; Yang Zemin; Xing Mengdao; Bao Zheng; Bao Min

来源：Journal of Xidian University, 2014, 41(1): 38-44+74.

DOI：10.3969/j.issn.1001-2400.2014.01.008

• Approximation model
• Azimuth resolution
• Circular scanning
• Doppler parameters
• Imaging method
• Internal relationships
• Signal characteristic
• Two-dimensional spectra

Circular scanning SAR (CSSAR) is a new mode for fast large area SAR imaging by increasing the azimuth scanning speed. The squint CSSAR possesses the advantages that the side-looking CSSAR does not have due to its unique observing direction. However, the available signal characteristic analysis and imaging method for side-looking CSSAR become questionable when applied to the squint CSSAR. This paper establishes the echo range model and analyzes several parameters such as azimuth scanning speed, Doppler characteristics and azimuth resolution according to the moving feature of squint CSSAR. Furthermore, the internal relationship between the squint CSSAR and the classical stripmap mode is revealed. The range approximation model as well as the corresponding imaging method is analyzed. Computer simulation results validate the conclusions and the imaging method.

• 出版日期2014
• 单位西安电子科技大学