Print Email Facebook Twitter Small Reflectors for Ground Motion Monitoring With InSAR Title Small Reflectors for Ground Motion Monitoring With InSAR Author Dheenathayalan, P. (TU Delft Mathematical Geodesy and Positioning) Caro Cuenca, M. (TNO) Hoogeboom, P. (TU Delft Atmospheric Remote Sensing) Hanssen, R.F. (TU Delft Mathematical Geodesy and Positioning) Date 2017 Abstract In recent years, synthetic aperture radar interferometry has become a recognized geodetic tool for observing ground motion. For monitoring areas with low density of coherent targets, artificial corner reflectors (CRs) are usually introduced. The required size of a reflector depends on radar wavelength and resolution and on the required deformation accuracy. CRs have been traditionally used to provide a high signal-to-clutter ratio (SCR). However, large dimensions can make the reflector bulky, difficult to install and maintain. Furthermore, if a large number of reflectors are needed for long infrastructure, such as vegetation-covered dikes, the total price of the reflectors can become unaffordable. On the other hand, small reflectors have the advantage of easy installation and low cost. In this paper, we design and study the use of small reflectors with low SCR for ground motion monitoring. In addition, we propose a new closed-form expression to estimate the interferometric phase precision of resolution cells containing a (strong or weak) point target and a clutter. Through experiments, we demonstrate that the small reflectors can also deliver displacement estimates with an accuracy of a few millimeters. To achieve this, we apply a filtering method for reducing clutter noise. Subject Artificial corner reflectors (CRs)deformation monitoringinfrastructure monitoringinterferometric phase precisionradar interferometryremote monitoringsmall reflectorssynthetic aperture radar (SAR) To reference this document use: http://resolver.tudelft.nl/uuid:c3d780a4-2265-41bc-b375-dd0ed1d55760 DOI https://doi.org/10.1109/TGRS.2017.2731424 ISSN 0196-2892 Source IEEE Transactions on Geoscience and Remote Sensing, 55 (12), 6703 - 6712 Part of collection Institutional Repository Document type journal article Rights © 2017 P. Dheenathayalan, M. Caro Cuenca, P. Hoogeboom, R.F. Hanssen Files PDF 08025520.pdf 2.13 MB Close viewer /islandora/object/uuid:c3d780a4-2265-41bc-b375-dd0ed1d55760/datastream/OBJ/view