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Assessment of radar interferometry performance for ground subsidence monitoring due to underground mining

机译：评估地下开采引起的地面沉降监测的雷达干涉测量性能

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This paper describes the results from the recently launched SAR satellites for the Purpose Of Subsidence monitoring over underground coal mine sites in the state of New South Wales, Australia, using differential interferometric synthetic aperture radar (DInSAR) technique. The quality of the mine Subsidence monitoring results is mainly constrained by noise due to the spatial and temporal decorrelation between the interferometric pair and the phase discontinuities in the interferogram. This paper reports oil the analysis of the impact of these two factors on the performance of DInSAR for monitoring ground deformation. Simulations were carried out prior to real data analyses. SAR data acquired using different operating frequencies, for example, X-, C- and L-band, from the TerraSAR-X, ERS-1/2, ENVISAT, JERS-1 and ALOS satellite missions, were examined. The simulation results showed that the new satellites ALOS, TerraSAR-X and COSMO-SkyMed perform much better than the satellites launched before 2006. ALOS and ENVISAT satellite SAR images with similar temporal coverage were searched for the test site. The ALOS PALSAR DInSAR results have been compared to DInSAR results obtained from ENVISAT ASAR data to investigate the performance of both satellites for ground subsidence monitoring. Strong phase discontinuities and decorrelation have been observed in almost all ENVISAT interferograms and hence it is not possible to generate the displacement maps Without errors. However these problems are minimal in ALOS PALSAR interferograms Clue to its spatial resolution and longer wavelength. Hence ALOS PALSAR is preferred for ground Subsidence monitoring in areas covered by vegetation and where there is a high rate ground deformation.
机译：本文介绍了最近发射的SAR卫星的结果，这些卫星用于使用差分干涉合成孔径雷达（DInSAR）技术对澳大利亚新南威尔士州的地下煤矿站点进行沉降监测。矿山沉降监测结果的质量主要受到干涉对和干涉图中相位不连续性之间时空去相关的噪声的限制。本文报道了这两个因素对DInSAR监测地面变形性能的影响的分析。在进行实际数据分析之前进行了模拟。考察了从TerraSAR-X，ERS-1 / 2，ENVISAT，JERS-1和ALOS卫星任务使用不同工作频率（例如X波段，C波段和L波段）获取的SAR数据。仿真结果表明，新卫星ALOS，TerraSAR-X和COSMO-SkyMed的性能比2006年之前发射的卫星要好得多。搜索了具有类似时间覆盖范围的ALOS和ENVISAT卫星SAR图像。将ALOS PALSAR DInSAR结果与从ENVISAT ASAR数据获得的DInSAR结果进行了比较，以研究两颗卫星在地面沉降监测中的性能。在几乎所有的ENVISAT干涉图中都观察到强的相位不连续性和去相关性，因此不可能生成没有错误的位移图。但是，由于ALOS PALSAR干涉图的空间分辨率和更长的波长，这些问题很少。因此，在植被覆盖且地面变形率高的地区，地面沉降监测的首选ALOS PALSAR。

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