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首先建立大尺度分层介质粗糙面散射的物理模型, 基于Stratton-Chu积分方程和Kirchhoff近似导出了粗糙面散射场的计算公式. 采用高斯随机粗糙面来模拟实际的分层介质粗糙面, 通过数值计算得到了正下视单站雷达接收到的后向散射回波. 理论推导了散射场强度与表面粗糙度之间的定量关系, 并从数值仿真的角度分析了表面和次表面的粗糙度对散射回波的影响, 给出了散射场随粗糙度变化的曲线. 最后考察了分层介质的电特性参数(介电常数和电导率)对分层粗糙面散射场的影响, 并对计算结果做出了分析.
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关键词:
- 电磁散射 /
- 分层介质 /
- 粗糙面 /
- Kirchhoff近似
A physical model for the electromagnetic scattering from large-scale rough surface of layered medium is established. Stratton-Chu integral equation and Kirchhoff approximation are adopted to calculate the electromagnetic scattering field. The Gaussian random rough surface is selected to simulate the actual rough surface of layered medium. The scattering echo is detected with a single-station nadir-looking radar sounder. The effects of surface and subsurface's roughness on the scattering filed are examined both theoretically and numerically. The effect of upper layer's electric properties (permittivity and conductivity) on the scattering field is also investigated and some analysis for the numerical results is presented.-
Keywords:
- electromagnetic scattering /
- layered medium /
- rough surface /
- kirchhoff approximation
[1] Ilyushin Y A, Seu R, Phillips R J 2005 Planet. Space Sci. 53 1427
[2] Mouginot J, Kofman W, Safaeinili A, Grima C, Herique A, Plaut J J 2009 Icarus 201 454
[3] Zhang Y Q, Ge D B 2009 Acta Phys. Sin. 58 4573 (in Chinese) [张玉强, 葛德彪 2009 58 4573]
[4] Spagnuolo M G, Grings F, Perna P, Franco M, Karszenbaun H, Ramos V A 2011 Planet. Space Sci. 59 1222
[5] Wei B, Ge D B, Wang F 2008 Acta Phys. Sin. 57 6290 (in Chinese) [魏冰, 葛德彪, 王飞 2008 57 6290]
[6] Guo L X, Wang Y H, Wu Z S 2005 Acta Phys. Sin. 54 5130 (in Chinese) [郭立新, 王运华, 吴振森 2005 54 5130]
[7] Ilyushin Y A 2004 Planet. Space Sci. 52 1195
[8] Ilyushin Y A 2007 Planet. Space Sci. 55 100
[9] Ye H X, Jin Y Q 2009 Acta Phys. Sin. 58 4579 (in Chinese) [叶红霞, 金亚秋 2009 58 4579]
[10] Huang C J, Liu Y F, Wu Z S, Sun Y Q, Long S M 2009 Acta Phys. Sin. 58 2397 (in Chinese) [黄朝军, 刘亚峰, 吴振森, 孙彦清, 龙姝明 2009 58 2397]
[11] Ulaby F T, Moore R K, Fung A K 1982 Microwave Remote Sensing (London: Addison Wesley Publishing) p12
[12] Fung A K 1994 Microwave Scattering and Emission Models and Their Applications (London: Artech House) p55
[13] Picardi G, Biccari D, Seu R, Marinangeli L, Johnson W T K, Jordan R L, Plaut J, Safaenili A, Gurentt D A, Ori G G, Orosei R, Calabrese D, Zampolini E 2004 Planet. Space Sci. 52 149
[14] Ren X C, Guo L X 2009 Acta Phys. Sin. 58 1627 (in Chinese) [任新成, 郭立新 2009 58 1627]
[15] Nouvel J F, Herique A, Kofman W, Safaeinili A 2004 Radio Sci. 39 RS1013
[16] Fa W Z, Jin Y Q 2010 Sci. China Earth Sci. 40 473 (in Chinese) [法文哲, 金亚秋 2010 中国科学: 地球科学 40 473]
[17] Kobayashi T, Oya H, Ono T 2002 Earth Planets Space 54 973
[18] Kobayashi T, Oya H, Ono T 2002 Earth Planets Space 54 982
[19] Kong J A 2005 Electromagnetic Wave Theory (Massachusetts: EMW Publishing) p470
[20] Zhang Z F, Nielsen E 2011 Radio Sci. 46 RS1007
-
[1] Ilyushin Y A, Seu R, Phillips R J 2005 Planet. Space Sci. 53 1427
[2] Mouginot J, Kofman W, Safaeinili A, Grima C, Herique A, Plaut J J 2009 Icarus 201 454
[3] Zhang Y Q, Ge D B 2009 Acta Phys. Sin. 58 4573 (in Chinese) [张玉强, 葛德彪 2009 58 4573]
[4] Spagnuolo M G, Grings F, Perna P, Franco M, Karszenbaun H, Ramos V A 2011 Planet. Space Sci. 59 1222
[5] Wei B, Ge D B, Wang F 2008 Acta Phys. Sin. 57 6290 (in Chinese) [魏冰, 葛德彪, 王飞 2008 57 6290]
[6] Guo L X, Wang Y H, Wu Z S 2005 Acta Phys. Sin. 54 5130 (in Chinese) [郭立新, 王运华, 吴振森 2005 54 5130]
[7] Ilyushin Y A 2004 Planet. Space Sci. 52 1195
[8] Ilyushin Y A 2007 Planet. Space Sci. 55 100
[9] Ye H X, Jin Y Q 2009 Acta Phys. Sin. 58 4579 (in Chinese) [叶红霞, 金亚秋 2009 58 4579]
[10] Huang C J, Liu Y F, Wu Z S, Sun Y Q, Long S M 2009 Acta Phys. Sin. 58 2397 (in Chinese) [黄朝军, 刘亚峰, 吴振森, 孙彦清, 龙姝明 2009 58 2397]
[11] Ulaby F T, Moore R K, Fung A K 1982 Microwave Remote Sensing (London: Addison Wesley Publishing) p12
[12] Fung A K 1994 Microwave Scattering and Emission Models and Their Applications (London: Artech House) p55
[13] Picardi G, Biccari D, Seu R, Marinangeli L, Johnson W T K, Jordan R L, Plaut J, Safaenili A, Gurentt D A, Ori G G, Orosei R, Calabrese D, Zampolini E 2004 Planet. Space Sci. 52 149
[14] Ren X C, Guo L X 2009 Acta Phys. Sin. 58 1627 (in Chinese) [任新成, 郭立新 2009 58 1627]
[15] Nouvel J F, Herique A, Kofman W, Safaeinili A 2004 Radio Sci. 39 RS1013
[16] Fa W Z, Jin Y Q 2010 Sci. China Earth Sci. 40 473 (in Chinese) [法文哲, 金亚秋 2010 中国科学: 地球科学 40 473]
[17] Kobayashi T, Oya H, Ono T 2002 Earth Planets Space 54 973
[18] Kobayashi T, Oya H, Ono T 2002 Earth Planets Space 54 982
[19] Kong J A 2005 Electromagnetic Wave Theory (Massachusetts: EMW Publishing) p470
[20] Zhang Z F, Nielsen E 2011 Radio Sci. 46 RS1007
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