DInSAR for the Detection of Land Subsidence in Mining

Comments and Problems

InSAR has become an operational technique, even though the presence of measurement biases due to atmospheric propagation effects seriously degrade the accuracy of InSAR-only results. When present in the InSAR image, these errors can lead to misinterpretation of the results. However, Ge L. et al. (2002) suggests data from GPS networks can be used to map tropospheric water vapour and ionospheric disturbances, and hence GPS results can be used to calibrate the atmospheric effects in InSAR.

 

InSAR assisted by GPS and GIS can cost-effectively monitor mine subsidence. This technology can be utilised on an operational basis by the mining industry and government regulators (Ge L., 2000).

 

The lack of InSAR satellites is restricting the potential of this technology to be applied on a day-to-day basis to tasks such as mine subsidence. Some of the InSAR satellites currently in orbit are also restricted by their band wavelengths (such as ERS) and can only effectively monitor urban areas (Takeuchi S. et al. , 2001).

©2004 Robert Walsh