Spaceborne SAR attitude steering method for smart imaging mode

作者：Yang, Wei; Ma, Xiao-Cong; Liu, Wei; Chen, Jie^*

来源：Electronics Letters, 2017, 53(6): 428-430.

DOI：10.1049/el.2016.4419

• spaceborne radar
• synthetic aperture radar
• radar imaging
• stereo image processing
• iterative methods
• optimisation
• spaceborne SAR attitude steering method
• smart imaging mode
• spaceborne synthetic aperture radar system
• scene illumination
• satellite flying direction
• three-axis attitude steering method
• zero-Doppler centroid requirement
• iterative optimisation algorithm
• satellite tool kit
• coastline imaging

The current spaceborne synthetic aperture radar systems are operated to illuminate the scene along the satellite flying direction. However, in many cases, the interested areas are not parallel to the flying direction, so an innovative smart imaging mode is acquired, which can be employed for illuminating scene along a given direction. A novel three-axis attitude steering method is proposed for smart imaging mode. First, mathematical model of the attitude steering is built by considering the restrictive conditions of zero-Doppler centroid requirement and the position of interested area. Then, an iterative optimisation algorithm is designed to calculate the three-axis steering angles. Finally, experiment results using the satellite tool kit tool validate the proposed methods well, especially in the case of coastline imaging.

• 出版日期2017-3-16
• 单位北京航空航天大学