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PIERS Online
Vol. 3
No. 1
2007
pp: 44-47Multitemporal C-Band Radar Measurement on Rice FieldsKa-Sing Lim, Chue-Poh Tan, Jun-Yi Koay, Voon Chet Koo, Hong Tat Ewe, Yew-Chiong Lo, and Azmah Ali doi:10.2529/PIERS060904212430 Downloads: 1294 Abstract:This paper investigates the relationship between C-Band backscatter measurement on the physical structure of rice fields and its growth stages. The study is based on a ground-based scatterometer experiment conducted on rice fields at Sungai Burung site in Malaysia for the year 2005 growing season. Seven C-band scatterometer acquisitions at full polarization, namely Horizontal-Horizontal, Horizontal Vertical, Vertical-Horizontal, Vertical-Vertical polarization with incidence angle from 0o to 60o, were measured. At the same time, ground truth data for an entire rice growing season were obtained at 12-day intervals from September to December 2005. The dates were chosen so as to coincide with RADARSAT-1 image acquisitions. The paper describes the experiment and investigates the radar sensitivity to the physical structures of rice at different polarization and incident angles for different rice growth stages. Based on the result, a close agreement of backscattering coefficient between the scatterometer and RADARSAT-1 was obtained.References:1. Madsen, S. and N. Skou, "Problems to be addressed by SAR systems in the 21st century: Where are we and where are we heading?," IEEE Geosci. Remote Sensing Soc. News., Mar., 1998. 2. Toan, T. L., H. Laur, E. Mougin, and A. Lopes, "Multitemporal and dual-polarization observations of agricultural vegetation covers by X-band SAR images," IEEE Trans. Geosci. Remote Sensing, Vol. 27, 709-717, Nov., 1989. 3. Kurosu, T., M. Fujita, and K. Chiba, "Monitoring of rice crop growth from space using the ERS-1 C-band SAR," IEEE. Trans. Geosci. Remote Sensing, Vol. 33, 1092-1096, July, 1995. 4. Toan, T. L., F. Ribbes, L. F. Wang, N. Floury, K. H. Ding, J. A. Kong, M. Fujita, and T. Kurosu, "Rice crop mapping and monitoring using ERS-1 data based on experiment and modeling results," IEEE Trans. Geosci. Remote Sensing, Vol. 35, 41-56, Jan., 1997. 5. Kim, S. K., B. W. Kim, Y. K. Kong, and Y.-S. Kim, "Radar backscattering measurement of rice crop using X-band scatterometer," IEEE Transaction on Geosci Remote Sensing, Vol. 38, No. 3, May, 2000. 6. Chet, K. V., C. B. Kuan, and C. H. Teik, "Development of a ground-based radar for scattering measurements," IEEE Antennas and Propagation Magazine, Vol. 45, Issue 2, 36-42, April, 2003. |
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