Ms. Sonal Gupta Profile

Sonal Gupta

at Indian Institute of Technology Roorkee

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Proceedings Article | 12 December 2006 Paper

Surface displacement studies using differential SAR interferometry: an overview

Sonal Gupta, Sajith K., Manoj Arora, Mukut Sharma

Proceedings Volume 6412, 64120N (2006) https://doi.org/10.1117/12.693801

KEYWORDS: Synthetic aperture radar, Interferometry, Mining, Stanford Linear Collider, Phase interferometry, Image processing, Natural disasters, Sensors, Phase measurement, Earthquakes

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The differential SAR interferometry (DInSAR) has been increasing used to monitor ground surface displacements, which may be caused by various natural disasters such as earthquakes, landslides, mining activities, avalanches etc. Conventionally, these displacements were being estimated through field measurements, which are time consuming, hazardous and with data collected over few point locations. Since all the development and rehabilitation works after a natural disaster strikes is carried out on regional basis, any information at spatial level is advantageous in planning, management and monitoring activities. In recent years, the application of Differential SAR interferometry is gaining momentum to estimate the surface displacements at millimeter level accuracy. The displacement maps produced via this technique provide information at spatial level in the region thereby assisting in judicious developmental and planning works in an efficient and cost-effective manner. The aim of this paper is provide an overview of the use of Differential SAR Interferometry (DinSAR) technology for the study of surface displacements. As a case study, land subsidence occurred due to coal mining in Jharia coal fields, Jharkhand, have been estimated through this technique. All the procedural steps in implementing the approach based on DinSAR have been explained in a simplified manner.

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