1. Yardim, C., Statistical estimation and tracking of refractivity from radar clutter, Ph.D. dissertation, Electrical Engineering, University of California, San Diego, 2007.
2. Wang, B., Z. S. Wu, Z. W. Zhao, and H. G. Wang, "Retrieving evaporation duct heights from radar sea clutter using particle swarm optimization (PSO) algorithm," Progress In Electromagnetics Research M, Vol. 9, 79-91, 2009.
doi:10.2528/PIERM09090403
3. Tabrikian, J., J. L. Krolik, and S. Vasudevan, "Estimating tropospheric refractivity parameters from radar sea clutter," Proceedings of the IEEE Signal Processing Workshop on Higher-Order Statistics, 345-348, IEEE Press, Piscataway, New Jersey.
4. Rogers, L. T., C. P. Hattan, and J. K. Stapleton, "Estimating evaporation duct heights from radar sea echo," Radio Sci., Vol. 35, No. 4, 955-966, 2000.
doi:10.1029/1999RS002275
5. Gerstoft, P., L. T. Rogers, J. L. Krolik, and W. S. Hodgkiss, "Inversion for refractivity parameters from radar sea clutter," Radio Sci., Vol. 38, No. 3, 8053, 2003, doi:10.1029/2002RS002640.
doi:10.1029/2002RS002640
6. Gerstoft, P., L. T. Rogers, W. S. Hodgkiss, and L. J. Wagner, "Refractivity estimation using multiple elevation angles," IEEE J. Oceanic Eng., Vol. 28, No. 3, 513-525, 2003.
doi:10.1109/JOE.2003.816680
7. Barrios, A. E., "Estimation of surface-based duct parameters from surface clutter using a ray trace approach," Radio Sci., Vol. 39, RS6013, 2004, doi:10.1029/2003RS002930.
8. Vasudevan, S., R. H. Anderson, S. Kraut, P. Gerstoft, L. T. Rogers, and J. Krolik, "Recursive Bayesian electromagnetic refractivity estimation from radar sea clutter," Radio Sci., Vol. 42, RS2014, 2007, doi:10.1029/2005RS003423.
9. Yardim, C., P. Gerstoft, and W. S. Hodgkiss, "Estimation of radio refractivity from radar clutter using bayesian monte carlo analysis," IEEE Trans. Antennas Propag., Vol. 54, No. 4, 1318-1327, 2006.
doi:10.1109/TAP.2006.872673
10. Yardim, C., P. Gerstoft, and W. S. Hodgkiss, "Statistical maritime radar duct estimation using hybrid genetic algorithm-Markov chain Monte Carlo method ," Radio Sci., Vol. 42, RS3014, 2007, doi:10.1029/2006RS003561.
doi:10.1029/2006RS003561
11. Yardim, C., P. Gerstoft, and W. S. Hodgkiss, "Tracking refractivity from clutter using Kalman and particle filters," IEEE Trans. Antennas Propag., Vol. 56, No. 4, 1058-1070, 2008.
doi:10.1109/TAP.2008.919205
12. Douvenot, R., V. Fabbro, P. Gerstoft, C. Bourlier, and J. Saillard, "A duct mapping method using least squares support vector machines," Radio Sci., Vol. 43, RS6005, 2008, doi:10.1029/2008RS003842.
doi:10.1029/2008RS003842
13. Douvenot, R., V. Fabbro, P. Gerstoft, C. Bourlier, and J. Saillard, "Real time refractivity from clutter using a best fit approach improved with physical information," Radio Sci., Vol. 45, RS1007, 2010, doi:10.1029/2009RS004137.
doi:10.1029/2009RS004137
14. Huang, S. X., X. F. Zhao, and Z. Sheng, "Refractivity estimation from radar sea clutter," Chin. Phys. B, Vol. 18, No. 11, 5084-5090, 2009.
doi:10.1088/1674-1056/18/11/079
15. Sheng, Z., S. X. Huang, and X. F. Zhao, "The determination of observation weight in inversion ocean duct using radar clutter," Acta Phys. Sin., Vol. 58, No. 9, 6627-6632, 2009.
16. Zhao, X. F., S. X. Huang, and Z. Sheng, "Ray tracing/correlation approach to estimation of surfaced-based duct parameters from radar clutter ," Chin. Phys. B, Vol. 19, No. 4, 049201, 2010.
doi:10.1088/1674-1056/19/4/049201
17. Huang, S. X. and R. S. Wu, Mathematical Physics Problems in Atmospheric Science, 2nd Ed., Meteorology Press, Beijing, China, 2005.
18. Hursky, P., M. B. Porter, B. D. Cornuelle, W. S. Hodgkiss, and W. A. Kuperman, "Adjoint modeling for acoustic inversion," J. Acoust. Soc. Am., Vol. 115, No. 2, 607-619, 2004.
doi:10.1121/1.1636760
19. Hermand, J. P., M. Meyer, M. Asch, and M. Berrada, "Adjoint-based acoustic inversion for the physical characterization of a shallow water environment," J. Acoust. Soc. Am., Vol. 119, No. 6, 3860-3871, 2006.
doi:10.1121/1.2197790
20. Zhao, X. F., S. X. Huang, and H. D. Du, "Theoretical analysis and numerical experiments of variational adjoint approach for refractivity estimation," Radio Sci., Vol. 46, RS1006, 2011, doi:10.1029/2010RS004417.
doi:10.1029/2010RS004417
21. Dockery, G. D., "Modeling electromagnetic wave propagation in the troposphere using the parabolic equation," IEEE Trans. Antennas Propag., Vol. 36, No. 10, 1464-1470, 1988.
doi:10.1109/8.8634
22. Barrios, A. E., Radio wave propagation in horizontally inhomogeneous environments by using the parabolic equation method , Technical Report, 1430, 1991.
23. Barrios, A. E., "Parabolic equation modeling in horizontally inhomogeneous environments," IEEE Trans. Antennas Propag., Vol. 40, No. 7, 791-797, 1992.
doi:10.1109/8.155744
24. Kuttler, J. R. and G. D. Dockery, "Theoretical description of the parabolic approximation/Fourier split-step method of representing electromagnetic propagation in the troposphere," Radio Sci., Vol. 26, No. 2, 381-393, 1991.
doi:10.1029/91RS00109
25. Barrios, A. E., "A terrain parabolic equation model for propagation in the troposphere," IEEE Trans. Antennas Propag., Vol. 42, No. 1, 90-98, 1994.
doi:10.1109/8.272306
26. Hitney, H. V., J. H. Richter, R. A. Pappert, K. D. Anderson, and G. B. Baumgartner, "Tropospheric radio propagation assessment," Proceedings of the IEEE, Vol. 73, No. 2, 265-285, 1985.
doi:10.1109/PROC.1985.13138
27. Zhu, C., R. H. Byrd, P. Lu, and J. Nocedal, "L-BFGS-B-Fortran subroutines for large-scale bound constrained optimization," Northwestern University EECS Technical Report NAM12, 1995.
28. Harris, F. J., "On the use of windows for harmonic analysis with the discrete fourier transform," Proceedings of the IEEE, Vol. 66, No. 1, 51-83, 1978.
doi:10.1109/PROC.1978.10837
29. Ding, J. L., J. F. Fei, X. G. Huang, X. Zhang, X. Zhou, and B. Tian, "Contrast on occurrence of evaporation ducts in the south china sea and east china sea area," Chinese Journal of Radio Science, Vol. 24, No. 6, 1018-1023, 2009.
30. Hitney, H. V. and R. Vieth, "Statistical assessment of evaporation duct propagation," IEEE Trans. Antennas Propag., Vol. 38, No. 6, 794-799, 1990.
doi:10.1109/8.55574
31. Chen, Z. C., Partial Differential Equation, 2nd Ed., Chinese Science and Technology University Press, Hefei, China, 2002.