Monitoring Highway Stability in Permafrost Regions with X-band Temporary Scatterers Stacking InSAR.
Monitoring Highway Stability in Permafrost Regions with X-band Temporary Scatterers Stacking InSAR.
复制标题
利用 X 波段临时散射体堆叠 InSAR 监测永久冻土区公路稳定性
DOI：
10.3390/s18061876
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发表时间：
2018-06-08
期刊：
影响因子：
--
通讯作者：
Li G
中科院分区：
文献类型：
--
作者：
Dai K;Liu G;Li Z;Ma D;Wang X;Zhang B;Tang J;Li G
在多年冻土区，波长较短的干涉图(如X波段)通常容易出现时间去相关现象，导致无法获得足够的高相干干涉图来进行常规的时间序列InSAR分析。本文提出将临时散射体用于叠加干涉合成孔径雷达方法，从而可以利用有限的合成孔径雷达图像和有限的高相干干涉图来提取多年冻土区的沉降。这种方法被称为临时散射体叠加干涉合成孔径雷达(TSS-InSAR)。以青海省G214国道青海省(多年冻土区)共和至榆树高速公路(约30公里)为例，对TSS-InSAR方法进行了详细的论证和实施。利用2015年5月至2015年8月期间获取的10幅TerraSAR-X图像，提取了该公路沿线的沉降量。在这种情况下，缺乏一致数量的合成孔径雷达采集限制了执行其他常规时间序列干涉合成孔径雷达分析的可能性。结果表明，该公路中段地处高温岩溶季节性冻土区，110天累计沉降量达10 cm。融化现象仍然是公路不稳定的主要原因。结果表明，TSS-InSAR方法可以有效地在有限的X波段SAR图像和有限的高相干干涉图的挑战性场景下提取地面下沉信息，而其他基于时间序列的InSAR技术不能以简单的方式应用。
Interferograms with short wavelength (e.g., X-band) are usually prone to temporal decorrelation in permafrost regions, leading to the unavailability of sufficient high-coherence interferograms for performing conventional time series InSAR analysis. This paper proposes the utilization of temporary scatterers for the stacking InSAR method, thus enabling extraction of subsidence in a permafrost region with limited SAR images and limited high-coherence interferograms. Such method is termed as the temporary scatterers stacking InSAR (TSS-InSAR). Taking the Gonghe-Yushu highway (about 30 km), part of G214 National Highway in Qinghai province (in a permafrost region), as a case study, this TSS-InSAR approach was demonstrated in detail and implemented. With 10 TerraSAR-X images acquired during the period from May 2015 to August 2015, the subsidence along this highway was extracted. In this case the lack of a consistent number of SAR acquisitions limits the possibility to perform other conventional time series InSAR analysis. The results show that the middle part of this highway is in the thermokarst and seasonal frozen soil area, and its accumulated subsidence reach up to 10 cm in 110 days. The thawing phenomena is still the main reason for the instability of highway. The results demonstrate that the TSS-InSAR method can effectively extract the subsidence information in a challenging scenario with limited X-band SAR images and limited high-coherence interferograms, where other time series InSAR-based techniques cannot be applied in a simple way.
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DOI：
10.1109/tgrs.2002.803792
发表时间：
2002-11-01
影响因子：
8.2
作者：
Berardino, P;Fornaro, G;Sansosti, E
通讯作者：
Sansosti, E
影响因子：
8.2
作者：
Ferretti, A;Prati, C;Rocca, F
通讯作者：
Rocca, F
DOI：
10.1109/tgrs.2003.814657
发表时间：
2003-10-01
影响因子：
8.2
作者：
Mora, O;Mallorqui, JJ;Broquetas, A
通讯作者：
Broquetas, A
影响因子：
4.2
作者：
Bianchini, Silvia;Raspini, Federico;Casagli, Nicola
通讯作者：
Casagli, Nicola
影响因子：
18.9
作者：
Luo, Jing;Niu, Fujun;Yin, Guoan
通讯作者：
Yin, Guoan