许兵

副教授 博士生导师 硕士生导师

所在单位:地球科学与信息物理学院

学历:博士研究生毕业

办公地点:中南大学新校区地科楼北211

联系方式:xubing@csu.edu.cn

学科:测绘科学与技术

Assessing the Use of GACOS Products for SBAS-InSAR Deformation Monitoring: A Case in Southern California

发布时间:2022-02-17

点击次数:

影响因子:3.576

DOI码:10.3390/s19183894

发表刊物:Sensors

关键字:InSAR; Short Baseline Subset (SBAS); Deformation Monitoring; GACOS Products.

摘要:The Generic Atmospheric Correction Online Service (GACOS) products for interferometric synthetic aperture radar (InSAR) are widely used near-real-time and global-coverage atmospheric delay products which provide a new approach for the atmospheric correction of repeat-pass InSAR. However, it has not been determined whether these products can improve the accuracy of InSAR deformation monitoring. In this paper, GACOS products were used to correct atmospheric errors in short baseline subset (SBAS)-InSAR. Southern California in the U.S. was selected as the research area, and the effect of GACOS-based SBAS-InSAR was analyzed by comparing with classical SBAS-InSAR results and external global positioning system (GPS) data. The results showed that the accuracy of deformation monitoring was improved in the whole study area after GACOS correction, and the mean square error decreased from 0.34 cm/a to 0.31 cm/a. The improvement of the mid-altitude (15-140 m) point was the most obvious after GACOS correction, and the accuracy was increased by about 23%. The accuracy for low- and high-altitude areas was roughly equal and there was no significant improvement. Additionally, GACOS correction may increase the error for some points, which may be related to the low accuracy of GACOS turbulence data.

论文类型:期刊论文

论文编号:3894

学科门类:工学

一级学科:测绘科学与技术

文献类型:J

卷号:19

期号:18

页面范围:3894

是否译文:

发表时间:2019-09-02

收录刊物:SCI

发布期刊链接:https://www.mdpi.com/1424-8220/19/18/3894/htm

附件:

  • 2019-Sensors-Assessing the Use of GACOS Products.pdf

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