Bridging InSAR and GPS Tomography: A New Differential Geometrical Constraint
Bridging InSAR and GPS Tomography: A New Differential Geometrical Constraint
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DOI：
10.1109/tgrs.2015.2463263
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发表时间：
2016-02
影响因子：
8.2
通讯作者：
P. Benevides;G. Nico;João Catalão;P. Miranda
中科院分区：
文献类型：
--
作者：
P. Benevides;G. Nico;João Catalão;P. Miranda
讨论了干涉合成孔径雷达(InSAR)和GPS层析成像技术相结合来估计大气折射率的三维分布。描述了一种利用InSAR提供的可降水量(PWV)时间变化图作为GPS层析成像的进一步约束的方法。该方法的目的是提高GPS层析成像重建大气折射率的精度。给出了利用葡萄牙里斯本地区获得的SAR和GPS数据获得的结果，并对其进行了评估。研究发现，由于GPS层析成像中常见的几何约束，重建的大气折射率更接近真实大气状态，平滑效果有所减弱。
The integration of interferometric synthetic aperture radar (InSAR) and GPS tomography techniques for the estimation of the 3-D distribution of atmosphere refractivity is discussed. A methodology to use the maps of the temporal changes of precipitable water vapor (PWV) provided by InSAR as a further constraint in the GPS tomography is described. The aim of the methodology is to increase the accuracy of the GPS tomography reconstruction of the atmosphere's refractivity. The results, which are obtained with SAR and GPS data acquired over the Lisbon area, Portugal, are presented and assessed. It has been found that the reconstruction of the atmospheric refractivity is closer to the real atmospheric state with a mitigation of the smoothing effects due to the usual geometrical constraints of the GPS tomography.