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首页> 外文期刊>International journal of applied earth observation and geoinformation >Mapping land subsidence in Jakarta, Indonesia using persistent scatterer interferometry (PSI) technique with ALOS PALSAR
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Mapping land subsidence in Jakarta, Indonesia using persistent scatterer interferometry (PSI) technique with ALOS PALSAR

机译：使用ALOS PALSAR的持续散射干涉测量（PSI）技术绘制印度尼西亚雅加达的地面沉降图

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Jakarta is the capital of Indonesia. It is one of the largest cities with an around 10 million population as for 2010, covering an area of about 661 square kilometers. The land subsidence phenomena in several areas of Jakarta are well known for many years. Land subsidence does damage infrastructures in the city; therefore, it has to be closely monitored and analysed. In this paper, the authors have demonstrated the capability of the PALSAR sensor aboard the Japanese ALOS satellite for large-scale mapping of land subsidence in Jakarta. Mapping results were produced from 17 ALOS PALSAR L-band radar images using persistent scatterer radar interferometry (PSI). The GEOS-PSI software, developed by the Geodesy and Earth Observing Systems group at UNSW for PSI analysis, was used to detect and map those land subsidence. The results showed that the land in the area of Jakarta was deforming at different rates across several zones. The land subsidence measured from ALOS PALSAR imagery were cross-examined with the subsidence values obtained from 4 GPS campaign surveys by the authors at 19 stations between 2007 and 2010. The magnitudes and trends of the deformation obtained from both techniques agreed well in general for those pinpoints of GPS. After the removal of 2 suspected outliers in GPS measurements, the subsidence rate difference between the two techniques range from -29 to 6 mm/year, with a standard deviation of 9 mm/year and an average absolute difference of 8 mm/year. This research has suggested that PSI with L-band ALOS PALSAR data can be a promising technique to complement the GPS surveying for monitoring land subsidence in super large cities like Jakarta.
机译：雅加达是印度尼西亚的首都。截至2010年，它是最大的城市之一，人口约1000万，面积约661平方公里。雅加达几个地区的地面沉降现象已经众所周知了许多年。地面沉降确实会破坏城市的基础设施;因此，必须对其进行严密监视和分析。在本文中，作者展示了日本ALOS卫星上的PALSAR传感器对雅加达的地面沉降进行大规模测绘的能力。使用持久散射雷达干涉测量法（PSI）从17个ALOS PALSAR L波段雷达图像中得出了制图结果。由UNSW的大地测量和地球观测系统小组开发的GEOS-PSI软件用于PSI分析，用于检测和绘制这些地面沉降。结果表明，雅加达地区的土地在几个区域内以不同的速率变形。作者使用ALOS PALSAR影像测量的地面沉降与2007年至2010年期间作者在19个站点进行的4次GPS运动调查获得的沉降值进行了交叉检验。从这两种技术获得的变形的大小和趋势在总体上都基本一致GPS的精确度。在除去GPS测量中的2个可疑异常值之后，这两种技术之间的下陷率差异为-29至6 mm /年，标准偏差为9 mm /年，平均绝对差为8 mm /年。这项研究表明，具有L波段ALOS PALSAR数据的PSI可能是一种有前途的技术，可以补充GPS测量，以监测雅加达等超大型城市的地面沉降。

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