Ground settlement of Chek Lap Kok Airport,Hong Kong,detected by satellite synthetic aperture radar interferometry  

作　　者：LIU Guoxiang DING Xiaoli CHEN Yongqi LI Zhilin LI Zhiwei 

机构地区：[1]Department of Surveying Engineering,Southwest Jiaotong University,Chengdu 610031,China [2]Department of Land Surveying and Geo-Informatics,Hong Kong Polytechnic University,Hung Horn,KLN,Hong Kong,China

出　　处：《Chinese Science Bulletin》2001年第21期1778-1782,共5页

基　　金：The work was supported by the Hong Kong Polytechnic University (Grant Nos. G-V747 and G-T179).

摘　　要：Satellite synthetic aperture radar (SAR) inter-ferometry is used to investigate the slowly accumulating ground settlement at the new Chek Lap Kok Airport in Hong Kong. Most of the land occupied by the airport was reclaimed from the sea and therefore certain ground settlement in the area has been expected. A pair of ERS-2 SAR images spanning nearly a year is used in the study. The high spatial resolution (20 m×20 m) ground settlement map derived indicates that the settlement that occurred in the area over the time period is as large as 50 mm. The SAR measurement results agree with the levelling measurements at some benchmarks in the area to well within 1 cm(rms error),and the overall correlation between the two types of results is 0.89. The paper presents some brief background of inter-ferometric SAR, and outlines the data processing methods and results.Satellite synthetic aperture radar (SAR) interferometry is used to investigate the slowly accumulating ground settlement at the new Chek Lap Kok Airport in Hong Kong. Most of the land occupied by the airport was reclaimed from the sea and therefore certain ground settlement in the area has been expected. A pair of ERS-2 SAR images spanning nearly a year is used in the study. The high spatial resolution (20 mx20 m) ground settlement map derived indicates that the settlement that occurred in the area over the time period is as large as 50 mm. The SAR measurement results agree with the levelling measurements at some benchmarks in the area to well within 1 cm(rms error), and the overall correlation between the two types of results is 0.89. The paper presents some brief background of interferometric SAR, and outlines the data processing methods and results.

关 键 词：synthetic aperture radar interferometry DECORRELATION atmospheric delay land RECLAMATION SETTLEMENT field. 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]