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http://dx.doi.org/10.5139/IJASS.2016.17.2.253

Interference Analysis for Synthetic Aperture Radar Calibration Sites with Triangular Trihedral Corner Reflectors

Shin, Jae-Min (Department of Electronics Engineering, Chungnam National University)
Ra, Sung-Woong (Department of Electronics Engineering, Chungnam National University)

Publication Information

International Journal of Aeronautical and Space Sciences / v.17, no.2, 2016 , pp. 253-259 More about this Journal

Abstract

The typical method for performing an absolute radiometric calibration of a Synthetic Aperture Radar (SAR) System is to analyze its response, without interference, to a target with a known Radar Cross Section (RCS). To minimize interference, an error-free calibration site for a Corner Reflector (CR) is required on a wide and flat plain or on an area without disturbance sources (such as ground objects). However, in reality, due to expense and lack of availability for long periods, it is difficult to identify such a site. An alternative solution is the use of a Triangular Trihedral Corner Reflector (TTCR) site, with a surrounding protection wall consisting of berms and a hollow. It is possible in this scenario, to create the minimum criteria for an effectively error-free site involving a conventional object-tip reflection applied to all beams. Sidelobe interference by the berm is considered to be the major disturbance factor. Total interference, including an object-tip reflection and a sidelobe interference, is analyzed experimentally with SAR images. The results provide a new guideline for the minimum criteria of TTCR site design that require, at least, the removal of all ground objects within the fifth sidelobe.

Keywords

Synthetic Aperture Radar(SAR); Calibration Site; Interference; Corner Reflector; Radar Cross Section;

Citations & Related Records

Reference

1	Freeman, A., "SAR Calibration: An Overview", Transactions on Geoscience and Remote Sensing, IEEE, Vol. 33, No. 6, 1992, pp. 1107-1121.
2	Borkar, V. G., Ghosh, A., Singh, R. K. and Chourasia, N., "Radar Cross-section Measurement Techniques", Defense Science Journal, Vol. 60, No. 2, 2010, pp. 204-212. DOI
3	Doerry, A. W., "Reflector for SAR Performance Testing, 2nd Ed.", Sandia National Laboratories, Sandia Report, SAND2014-0882, 2014.
4	Garthwaite, M. C., Nancarrow, S., Hislop, A., Thankappan, M., Dawson, J. H. and Lawrie, S., "The Design of Radar Corner Reflectors for the Australian Geophysical Observing System - A Single Design Suitable for InSAR Deformation Monitoring and SAR Calibration at Multiple Microwave Frequency Bands", Department of Industry and Science, Geoscience Australia, GeoCat 82751, 2015.
5	Sarabandi, K. and Chiu T.-C., "Optimum Corner Reflectors for Calibration of Imaging Radars", Transactions on Antennas and Propagation, IEEE, Vol. 44, No. 10, 1996, pp. 1348-1361. DOI
6	Qin, Y., Perissin D. and Lei, L., "The Design and Experiments on Corner Reflectors for Urban Ground Deformation Monitoring in Hong Kong", International Journal of Antennas and Propagation, Hindawi Publishing Corporation, 2013, pp. 1-8.
7	SHIN, J. M., LEE, K. J. and KIM, J. H., "Field Test of KOMPSAT-5 Calibration Equipment", International Geoscience & Remote Sensing Symposium, IEEE, 2010, pp. 805-807.
8	Ulander, L. M. H., "Accuracy of using Point Targets for SAR Calibration", Transactions on Aerospace and Electronic Systems, IEEE, Vol. 27, No. 1, 1991.