海面微波散射场多普勒谱特性研究

姜文正; 袁业立; 运华; 张彦敏

doi:10.7498/aps.61.124213

摘要

基于粗糙面电磁散射双尺度模型推导给出了海面微波散射场多普勒谱频移和谱宽的理论公式, 在该理论公式的推导过程中同时考虑了大尺度海浪的倾斜调制、遮蔽效应和曲率修正效应等因素的影响. 文中将理论公式计算结果与精确数值结果进行了比较, 并讨论了倾斜调制、遮蔽效应及曲率修正效应等因素对多普勒频移和谱宽的影响, 发现倾斜调制使水平极化散射回波多普勒频移显著增大, 从而导致水平极化回波多普勒频移比垂直极化回波多普勒频移大; 在中等入射角度区域, 遮蔽效应和曲率修正效应对多普勒谱并无显著影响, 而在掠射条件下, 遮蔽效应使得多普勒频移增大、谱宽变窄. 本研究对深入理解动态海面散射场频谱特性具有一定参考意义.

关键词:

Abstract

Based on the composite surface scattering model, the analytical formulas for Doppler shift and bandwidth of radar echoes return from time-varying sea surface are derived. In our derivations, the influences of the tilt modulation, the shadow and the curvature of large-scale undulating waves are all taken into account for achieving more reasonable results. Comparisons between the theoretical results and direct numerical simulations demonstrate that the analytical formulas can significantly improve the simulated results. And the effects of the tilt modulation, the shadow and the curvature on Doppler spectral properties are discussed in detail. From the simulated results, it is found that the predicted Doppler shifts are always larger in HH-polarization than in VV-polarization due to the tilt modulation of large-scale waves. In addition, at low-grazing angles, the shadow of large-scale waves results in a rapid increase of the predicted Doppler shift, and on the contrary maks the bandwidth narrower.

Keywords:

作者及机构信息

1.
中国科学院海洋研究所, 青岛 266071;

2.
国家海洋局第一海洋研究所, 青岛 266061;

3.
中国科学院研究生院, 北京 100049;

4.
中国海洋大学信息科学与工程学院, 青岛 266003

基金项目: 国家自然科学基金青年基金(批准号: 40906088)和教育部博士点基金(批准号: 200804231021)资助的课题.

Authors and contacts

1.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;

2.
The First Institute of Oceanography, SOA, Qingdao 266061, China;

3.
Graduate School, Chinese Academy of Sciences, Beijing 100049, China;

4.
College of Information Science.& Engineering, Ocean University of China, Qingdao 266003, China

Funds: Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 40906088), and the Specialized Research Fund for the Doctoral Program of Higher Education (Grant No. 200804231021).

参考文献

[1]	Johnson J T, Burkholder R J, Toporkov J V, Lyzenga D R, Plant W J 2009 IEEE Trans. Geosci. Remote Sensing 47 1641
[2]	Chapron B, Collard F, Ardhum F 2005 J. Geophys. Res. 110 C07008
[3]	Johannessen J A, Kudryavtsev V, Akimov D, Eldevik T, Winther N, Chapron B 2005 J. Geophys. Res. 110 C07017
[4]	Kudryavtsev V, Akimov D, Johannessen J A, Chapron B 2005 J. Geophys. Res. 110 doi: 10.1029/ 2004JC002505
[5]	Crombie D D 1955 Nature 175 681
[6]	Barrick D E 1977 Radio Sci. 12 415
[7]	Bass F G, Fuks I M, Kalmykov A I, Ostrovsky I E, Rosenberg A D 1968 IEEE Trans. Antennas Propagat. 16 560
[8]	Wright J W, Keller W C 1971 Phys. Fluids 14 466
[9]	Mouche A, Chapron B, Reul N, Collard F 2008 Waves Random and Complex Media 18 185
[10]	Zhang Y H, Wang Y H, Guo L X 2010 Chin. Phys. B 19 054103
[11]	Wang Y H, Zhang Y M 2011 IEEE Trans. Geosci. Remote Sensing 49 1071
[12]	Guo L X, Wang R, Wang Y H, Wu Z S 2008 Acta Phys. Sin. 57 3464 (in Chinese) [郭立新, 王蕊, 王运华, 吴振森 2008 57 3464]
[13]	Toporkov J V, Brown G S 2000 IEEE Trans. Geosci. Remote Sensing 38 1616
[14]	Johnson J T, Toporkov J V, Brown G S 2001 IEEE Trans. Geosci. Remote Sensing 39 2411
[15]	Soriano G, Joelson M, Saillard M, Marseille P C 2006 IEEE Trans. Geosci. Remote Sensing 44 2430
[16]	Wang Y H, Zhang Y M, He M X, Zhao C F 2012 IEEE Trans. Geosci. Remote Sensing 50
[17]	Zavorotny V U, Voronovich A G 1998 IEEE Trans. Antennas Propagat 46 84
[18]	Voronovich A G, Zavorotny V U 1998 Waves Random Media 8 41
[19]	Ulaby F T, Moore R K, Fung A K 1982 Microwave Remote Sensing. Vol. II (Reading, MA: Addision- Wesbey)
[20]	Klein L A, Swift C T 1977 IEEE Trans. Antennas Propagat 25 104
[21]	Smith B G 1967 Journal of Geophysical Research 72 4059
[22]	Keller W C, Plant W J 1994 J. Geophys. Res. 99 9751

施引文献

[1]	Johnson J T, Burkholder R J, Toporkov J V, Lyzenga D R, Plant W J 2009 IEEE Trans. Geosci. Remote Sensing 47 1641
[2]	Chapron B, Collard F, Ardhum F 2005 J. Geophys. Res. 110 C07008
[3]	Johannessen J A, Kudryavtsev V, Akimov D, Eldevik T, Winther N, Chapron B 2005 J. Geophys. Res. 110 C07017
[4]	Kudryavtsev V, Akimov D, Johannessen J A, Chapron B 2005 J. Geophys. Res. 110 doi: 10.1029/ 2004JC002505
[5]	Crombie D D 1955 Nature 175 681
[6]	Barrick D E 1977 Radio Sci. 12 415
[7]	Bass F G, Fuks I M, Kalmykov A I, Ostrovsky I E, Rosenberg A D 1968 IEEE Trans. Antennas Propagat. 16 560
[8]	Wright J W, Keller W C 1971 Phys. Fluids 14 466
[9]	Mouche A, Chapron B, Reul N, Collard F 2008 Waves Random and Complex Media 18 185
[10]	Zhang Y H, Wang Y H, Guo L X 2010 Chin. Phys. B 19 054103
[11]	Wang Y H, Zhang Y M 2011 IEEE Trans. Geosci. Remote Sensing 49 1071
[12]	Guo L X, Wang R, Wang Y H, Wu Z S 2008 Acta Phys. Sin. 57 3464 (in Chinese) [郭立新, 王蕊, 王运华, 吴振森 2008 57 3464]
[13]	Toporkov J V, Brown G S 2000 IEEE Trans. Geosci. Remote Sensing 38 1616
[14]	Johnson J T, Toporkov J V, Brown G S 2001 IEEE Trans. Geosci. Remote Sensing 39 2411
[15]	Soriano G, Joelson M, Saillard M, Marseille P C 2006 IEEE Trans. Geosci. Remote Sensing 44 2430
[16]	Wang Y H, Zhang Y M, He M X, Zhao C F 2012 IEEE Trans. Geosci. Remote Sensing 50
[17]	Zavorotny V U, Voronovich A G 1998 IEEE Trans. Antennas Propagat 46 84
[18]	Voronovich A G, Zavorotny V U 1998 Waves Random Media 8 41
[19]	Ulaby F T, Moore R K, Fung A K 1982 Microwave Remote Sensing. Vol. II (Reading, MA: Addision- Wesbey)
[20]	Klein L A, Swift C T 1977 IEEE Trans. Antennas Propagat 25 104
[21]	Smith B G 1967 Journal of Geophysical Research 72 4059
[22]	Keller W C, Plant W J 1994 J. Geophys. Res. 99 9751

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