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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Apsidal Precession Effects on the Lunar-Based Synthetic Aperture Radar Imaging Performance
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Apsidal Precession Effects on the Lunar-Based Synthetic Aperture Radar Imaging Performance

机译：对农历基合成孔径雷达成像性能的暂性进程效应

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摘要

There have been considerable interests in the lunar-based synthetic aperture radar (LBSAR) for monitoring large-scale geoscience phenomena. However, the signal distortions given rise by lunar orbital perturbations, especially the apsidal precession, are particularly severe in the LBSAR. The apsidal precession effects can induce a coordinate drift of the LBSAR, which can further lead to the variation in the range history of the LBSAR. As a result, LBSAR's image performance might be affected. In this letter, we thoroughly investigate whether the apsidal precession effects cause the phase decorrelation in the signal of the LBSAR, and how such effects impact the LBSAR imaging. The theoretical result shows that the impact of the lunar apsidal precession mainly results in the first-order and second-order Doppler errors, which further influence the geometric location and focusing quality along the azimuth direction. Numerical simulations using the point target response show good consistency with the theoretical analysis. To this end, the lunar apsidal precession effects deserve special care in the LBSAR for high imaging quality.
机译：用于监测大规模地球科学现象的月球基合成孔径雷达（LBSAR）存在相当大的兴趣。然而，在LBSAR中，月球轨道扰动造成的信号失真尤其是暂性的扰动。持久性预介绍效果可以引起LBSAR的坐标漂移，这可以进一步导致LBSAR的范围历史的变化。因此，LBSAR的图像性能可能会受到影响。在这封信中，我们彻底调查了持久性的预防效果是否导致LBSAR信号中的相位去相关性，以及这种影响如何影响LBSAR成像。理论结果表明，月球散对进出的影响主要导致一阶和二阶多普勒误差，这进一步影响了几何位置和沿方位角的聚焦质量。使用点目标响应的数值模拟显示了与理论分析的良好一致性。为此，月球暂停的预防效应应该在LBSAR中获得高成像质量的特殊护理。

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