Abstract
The application of ground-based radar to monitor the terrain displacement has attracted more and more attentions recently. Most of the existing ground-based radars utilise a linear horizontal rail where the antennas move to generate the image of the test site. Here, the authors present a topology of antenna array with which the digital elevation model of the observed scene can also be generated besides the 2-D image. Several field experiments have been carried out to evaluate the performance of authors’ developed ground-based differential interferometry radar (GB-DInR) configured with this multiple-input multiple-output (MIMO) antenna array. The results demonstrate that authors’ developed MIMO GB-DInR is able to achieve a sub-millimetre precision of displacement measurement and derive the elevation information of target with an error of <0.1 m at a distance of around 100 m.
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