Active reflectors for interferometric SAR deformation measurement

This paper is focused on the design, implementation and testing of an active reflector, to be used to support deformation monitoring studies based on Synthetic Aperture Radar interferometry. The device is designed to work in C-band with Sentinel-1 data, operating at 5.405 GHz ± 50 MHz. A brief description of the active reflector is provided. It consists of two antennas and an amplifying section. The active reflector has been tested in different experiments. In this paper, we describe the experiment carried out in the Parc Mediterrani de la Tecnologia (Castelldefels, Barcelona). The result shows a strong correlation with temperature. A calibration test was carried out to experimentally derive a calibration curve to correct the effect of temperature on phase stability.
This work is part of a project that has received funding from the European GNSS Agency under the European Union’s Horizon 2020 research and innovation programme, with grant agreement No 776335, project GIMS, “Geodetic Integrated Monitoring System”. This work has been partially funded by AGAUR, Generalitat de Catalunya, through the Consolidated Research Group RSE, “Remote Sensing” (Ref: 2017-SGR-00729)
Postprint (published version)