A new SAR radiometric terrain correction method was proposed to reduce the terrain effects in sloped regions. Based on this method, a procedure for polarimetric SAR terrain effect reduction was proposed, including geometric correction, shadow detection, radiometric terrain correction, and polarization orientation angle shift compensation. Experiments using RADARSAT-2 polarimetric SAR data of the Three Gorges Area, China demonstrated the effectiveness of the proposed radiometric terrain correction method. Both visual and quantitative analyses showed that after the proposed radiometric terrain correction method was applied, the contrast between different slopes that caused by local incidence angle differences, foreshortening, and layover was significantly reduced. The difference of backscattering intensity on slopes facing the radar sensor and facing away from the sensor was reduced from 12.5 dB before radiometric correction to 1.3 dB. The overall accuracy of land use / land cover classification was improved by 11.2 percent using the terrain corrected polarimetric SAR data.
"An Improved SAR Radiometric Terrain Correction Method and Its Application in Polarimetric SAR Terrain Effect Reduction," Progress In Electromagnetics Research B,
Vol. 54, 107-128, 2013. doi:10.2528/PIERB13052021
1. Kong, J. A., S. H. Yueh, H. H. Lim, R. T. Shin, and J. J. van Zyl, "Classification of earth terrain using polarimetric synthetic aperture radar images," Progress In Electromagnetics Research, Vol. 3, 327-370, 1990.
2. Lee, J. S., et al. "Classification of multi-look polarimetric SAR imagery-based on complex wishart distribution," International Journal of Remote Sensing, Vol. 15, 2299-2311, 1994. doi:10.1080/01431169408954244
3. Lee, J. S., et al. "Unsupervised classification using polarimetric decomposition and the complex Wishart classifier," IEEE Transactions on Geoscience and Remote Sensing, Vol. 37, 2249-2258, 1999. doi:10.1109/36.789621
4. Pottier, E. and J. S. Lee, "Application of the `H/A/(alpha)under-ba' polarimetric decomposition theorem for unsupervised classification of fully polarimetric SAR data based on the Wishart distribution," CEOS SAR Workshop, Vol. 450, 335-340, 2000.
5. Lee, J. S., et al. "Unsupervised terrain classification preserving polarimetric scattering characteristics," IEEE Transactions on Geoscience and Remote Sensing, Vol. 42, 722-731, Apr. 2004. doi:10.1109/TGRS.2004.836769
6. Mishra, P., D. Singh, and Y. Yamaguchi, "Land cover classification of palsar images by knowledge based decision tree classi¯er and supervised classifiers based on SAR observables," Progress In Electromagnetics Research B, Vol. 30, 47-70, 2011.
7. Ferro-Famil, L. and E. Pottier, "Dual frequency polarimetric SAR data classification and analysis," Progress In Electromagnetics Research, Vol. 31, 247-272, 2001. doi:10.2528/PIER00081601
8. Yang, J., X. She, and T. Xiong, "Iteration based polarimetric SAR image classification," PIERS Proceedings, 47-50, Beijing, China, Mar. 26-30, 2007.
9. Zhang, Y., L. Wu, and G. Wei, "A new classifier for polarimetric SAR images," Progress In Electromagnetics Research, Vol. 94, 83-104, 2009. doi:10.2528/PIER09041905
10. Jin, Y. Q., "Polarimetric scattering modeling and information retrieval of SAR remote sensing --- A review of FDU work," Progress In Electromagnetics Research, Vol. 104, 333-384, 2010. doi:10.2528/PIER10020101
11. Lee, J. S. and E. Pottier, Polarimetric Radar Imaging: Form Basics to Applications, Taylor & Francis Group, New York, 2009.
12. Lee, J. S., et al. "Polarimetric SAR data compensation for terrain azimuth slope variation ," IEEE Transactions on Geoscience and Remote Sensing, Vol. 38, 2153-2163, 2000. doi:10.1109/36.868874
13. Lee, J. S., et al. "On the estimation of radar polarization orientation shifts induced by terrain slopes," IEEE Transactions on Geoscience and Remote Sensing, Vol. 40, 30-41, Jan. 2002. doi:10.1109/36.981347
14. Lee, J.-S. and T. L. Ainsworth, "The effect of orientation angle compensation on coherency matrix and polarimetric target decompositions," IEEE Transactions on Geoscience and Remote Sensing, Vol. 49, 53-64, Jan. 2011. doi:10.1109/TGRS.2010.2048333
15. Meier, E., et al. "SAR geocoding: Data and systems," Precise Terrain Corrected Geocoded Images, Hervert Wichmann Verlag GmbH, Karlsruhe, 1993.
16. Loew, A. and W. Mauser, "Generation of geometrically and radiometrically terrain corrected SAR image products," Remote Sensing of Environment, Vol. 106, 337-349, Feb. 15, 2007. doi:10.1016/j.rse.2006.09.002
17. Small, D., "Flattening gamma: Radiometric terrain correction for SAR imagery," IEEE Transactions on Geoscience and Remote Sensing, Vol. 49, 3081-3093, Aug. 2011. doi:10.1109/TGRS.2011.2120616
18. Chen, Z. H. and J. F. Wang, "A new method for minimizing topographic effects on RADARSAT-1 images: An application in mapping human settlements in the mountainous three gorges area, China," Canadian Journal of Remote Sensing, Vol. 34, 13-25, Feb. 2008. doi:10.5589/m08-005
19. Guindon, B. and M. Adair, "Analytic formulation of spaceborne SAR image geocoding and `value-added' product generation procedures using digital elevation data," Canadian Journal of Remote Sensing, Vol. 18, 2-12, Jan. 1992.
20. Corner, W. R. and W. G. Rees, The Simulation of Geometric Distortion in A Synthetic Aperture Radar Image of Alpine Terrain, 1995.
21. Freeman, A. and J. C. Curlander, "Radiometric correction and calibration of SAR images," Photogrammetric Engineering and Remote Sensing, Vol. 55, 1295-1301, Sep. 1989.
22. Holecz, F., et al. "Rigorous derivation of backscattering coefficient," IEEE Geoscience and Remote Sensing Society Newsletter, 6-14, 1994.
23. Vanzyl, J. J., et al. "The effect of topography on SAR calibration," IEEE Transactions on Geoscience and Remote Sensing, Vol. 31, 1036-1043, 1993. doi:10.1109/36.263774
24. Goering, D. J., et al. "Removal of terrain effects from SAR satellite imagery of arctic tundra," IEEE Transactions on Geoscience and Remote Sensing, Vol. 33, 185-194, Jan. 1995. doi:10.1109/36.368210
25. Ulander, L. M. H., "Radiometric slope correction of synthetic-aperture radar images," IEEE Transactions on Geoscience and Remote Sensing, Vol. 34, 1115-1122, Sep. 1996. doi:10.1109/36.536527
26. Tilley, D. G. and K. S. Bonwit, "Reduction of layover distortion in SAR imagery," Remote Sensing of Environment, Vol. 27, 211-220, Mar. 1989. doi:10.1016/0034-4257(89)90083-7
27. Bolter, R., et al., "Geocoding in SAR layover areas," 2nd European Conference on Synthetic Aperture Radar, 481-484, Friedrichshafen, Germany, 1998.
28. Small, D., et al. "Terrain-flattened gamma nought Radarsat-2 backscatter," Canadian Journal of Remote Sensing, Vol. 37, 493-499, Oct. 2011. doi:10.5589/m11-059
29. Schuler, D. L., et al. "Compensation of terrain azimuthal slope effects in geophysical parameter studies using polarimetric SAR data," Remote Sensing of Environment, Vol. 69, 139-155, Aug. 1999. doi:10.1016/S0034-4257(99)00017-6
30. Yamaguchi, Y., et al. "Four-component scattering power decomposition with rotation of coherency matrix," IEEE Transactions on Geoscience and Remote Sensing, Vol. 49, 2251-2258, Jun. 2011. doi:10.1109/TGRS.2010.2099124
31. Raney, R. K., et al. A Plea for Radar Brightness, 1994.