Geoscience Australia is developing the geospatial component of the Australian Geophysical Observing System (AGOS). AGOS infrastructure will include a network of radar corner reflectors, in addition to a geodetic ground mark network for monitoring ground deformation in Australia. In this paper we describe the design of radar corner reflectors for deformation studies and calibration of Synthetic Aperture Radar sensors. Through a prototyping campaign in 2013 we will seek a single
reflector design that can be used for deformation and calibration studies using X- and C-band SAR sensors. Prototyping will involve precise determination of reflector radar cross section (RCS) at an outdoor radar test range and a temporary field deployment in the Canberra region during which X- and
C-band acquisitions will be made from orbiting SAR satellites. We outline plans to deploy corner reflectors in the Surat Basin of Queensland to monitor ground deformation induced by coal seam gas extraction.