A Parameter Optimization Model for Geosynchronous SAR Sensor in Aspects of Signal Bandwidth and Integration Time

作者：Chen, Jianlai; Sun, Guang-Cai; Xing, Mengdao^*; Yang, Jun; Ni, Chong; Zhu, Yu; Shu, Weiping; Liu, Wenkang

来源：IEEE Geoscience and Remote Sensing Letters, 2016, 13(9): 1374-1378.

DOI：10.1109/LGRS.2016.2587318

• Geosynchronous synthetic aperture radar (Geo-SAR)
• impulse response width (IRW) curve
• integration time
• parameter optimization model
• signal bandwidth

Signal bandwidth and integration time are two significant parameters of a geosynchronous synthetic aperture radar (SAR) sensor. They directly determine the resolution characteristic of SAR imagery. Because their contributions to the ground impulse response width (IRW) curve (consists of -3-dB resolutions in every direction) are severely coupled, an analytical extraction method of the ground IRW curve is studied to analyze the coupling characteristic. Due to the coupling, the IRWcurve is generally spatially variant and, thus, can degrade the quality of SAR imagery. To minimize the variation, the two parameters are optimized. However, the optimized signal bandwidth is found to be satellite position varied, which complicates the system design. To solve this problem, a parameter optimization model is built to obtain one optimal signal bandwidth as well as to decrease the variation.

• 出版日期2016-9
• 单位中国空间技术研究院; 西安科技大学; 西安电子科技大学