摘要
在星机双基地SAR中,虽然卫星的飞行轨道固定,但飞机的飞行方式灵活得多,从而使得系统具有很强的灵活性。为了保证成像质量,显然飞机的飞行参数也必须满足一定的约束条件。为避免获得无法接受的地距分辨率和方位分辨率,较为系统地分析了星机双基地SAR中飞机飞行参数的约束条件,得出了飞机应与卫星处于场景同侧飞行、飞机航向角与卫星航向角间的偏离不能过大(如不能超过120°)等一系列结论,为设计星机双基地SAR系统时飞机飞行参数的选择提供了一定的理论依据。
The trajectories of the spaceborne transmitters are fixed in spaceborne/airborne hybrid bistatic SAR systems,whereas the airborne receivers' trajectories are very flexible and the whole system is thus also flexible.Obviously,the aircraft flight parameters must obey some constraints to achieve the images with acceptable quality.The concrete constraints are systematically analyzed from various perspectives such as avoiding resulting in unacceptable ground-range resolution or azimuth resolution.A series of related conclusions are drawn,e.g.,that the aircraft and the satellite should fly at the same side of the scene as well as that the heading deviation between the satellite and the aircraft should not be too large(e.g.,smaller than 120°).The drawn conclusions provide the theoretical foundations for choosing the appropriate flight parameters for the aircraft when designing the spaceborne/airborne hybrid bistatic SAR systems.
出处
《遥测遥控》
2010年第3期27-33,38,共8页
Journal of Telemetry,Tracking and Command
基金
国家自然科学基金(40974072)
关键词
双基地SAR
星机双基地SAR
飞行参数
约束条件
Bistatic SAR
Spaceborne/Airborne hybrid bistatic SAR
Aircraft flight parameters
Constraint conditions
