Design of Translational Invariant Mode Based on Small SAR Satellite
In response to the requirements for improving the emergency observation efficiency of multiple targets of in-orbit small synthetic aperture radar(SAR)satellites in key areas,a design method for the translational invariant mode based on small SAR satellites is proposed.First,the design method is introduced,and the range dimension and large angle scanning capability of loaded planar phased array antenna are designed.Then,in view of regional multiple targets,a conditional trigger target-decision strategy and an on-board radar working parameter calculation strategy are proposed.Finally,based on the task-decision strategy and the task-planning model established in this paper,the simulation analyses of multi-target observation efficiency evaluation are carried out in four working modes,respectively,i.e.,left view,side view,translational invariant,and left and right maneuvering side view.The results show that compared with the side view mode,the target observation efficiency of the translational invariant mode can be improved to 41%.Compared with the left and right maneuvering side view mode,the target observation efficiency of the translational invariant mode can be improved to 73%.Therefore,the translational invariant mode designed in this article can effectively improve the observation efficiency towards regional multiple targets.
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