ONERA-DLR bistatic SAR campaign: planning, data acquisition, and first analysis of bistatic scattering behaviour of natural and urban targets
ONERA-DLR bistatic SAR campaign: planning, data acquisition, and first analysis of bistatic scattering behaviour of natural and urban targets
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DOI：
10.1049/ip-rsn:20045117
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发表时间：
2006-06-01
期刊：
影响因子：
--
通讯作者：
Giroux, V.
中科院分区：
文献类型：
--
作者：
Dubois-Fernandez, P.;Cantalloube, H.;Giroux, V.
双基地配置是一个有吸引力的概念，星载和机载SAR任务时，分布式雷达是必要的，例如在干涉仪应用的情况下。第一个原因是通过仅具有一个发射器（昂贵的部分）和多个接收器，在多个雷达元件上实现了重要的成本降低。最有前途的应用是单通干涉测量与大的基线和目标或表面特性的双基地散射签名分析。在防御方面，与只接收部件相关的改进的隐身可以提供更广泛的作战能力。为了探索与双基地雷达有关的潜力和技术挑战，德国航天中心和法国国家航空和航天局在2002年10月至2003年2月期间进行了一次联合双基地机载雷达试验，试验涉及两个合成孔径雷达系统E-SAR和RAMSES。两个主要的几何构型被用来探索不同的科学和技术目标。在第一种几何配置中，即准单基地模式中，两架飞机彼此非常接近地飞行，以便在具有大的干涉测量基线的单通道跨平台配置中获取干涉测量数据。第二种几何配置被设计成以大的收发分置角获取图像。两架飞机在平行轨道上飞行，相距约2公里，高度大致相同，天线指向地面上的同一区域。作者描述了这项研究计划，包括准备阶段，分析的技术挑战，坏之前要解决的收购，采取的战略，为双基地图像处理，第一个结果和初步分析所获得的图像。
Bistatic configuration is an attractive concept for spaceborne and airborne SAR missions when distributed radars are necessary as for example in the case of interferometric applications. The first reason is the important cost reduction achieved over the multiple radar elements, by having only one transmitter (expensive part) and multiple receivers. The most promising applications are single-pass interferometry with a large baseline and target or surface characterisation from bistatic scattering signature analysis. In a defence context, the improved stealth associated with the receive-only component can provide a wider operational capability. In order to explore the potentials and technical challenges associated with bistatic radar, DLR and ONERA have conducted a joint bistatic airborne radar experiment involving both their SAR systems E-SAR and RAMSES between October 2002 and February 2003. Two main geometrical configurations were flown to explore different scientific and technical objectives. In the first geometrical configuration, the quasi-monostatic mode, the two planes were flying very close to each other to acquire interferometric data in a single-pass cross-platform configuration with large interferometric baselines. The second geometrical configuration was designed to acquire images with a large bistatic angle. The two planes were flying on parallel tracks around 2 kin apart, at about the same altitude, with the antennas pointing at the same area on the ground. The authors describe this research programme, including the preparation phase, the analysis of the technological challenges that bad to be solved before the acquisition, the strategy adopted for bistatic image processing, the first results and a preliminary analysis of the acquired images.