Propagation modeling of ocean-scattered low-elevation GPS signals for maritime tropospheric duct inversion

doi:10.1088/1674-1056/21/10/109202

中国物理B ›› 2012, Vol. 21 ›› Issue (10): 109202-109202.doi: 10.1088/1674-1056/21/10/109202

• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇下一篇

Propagation modeling of ocean-scattered low-elevation GPS signals for maritime tropospheric duct inversion

张金鹏^a, 吴振森^a, 赵振维^b, 张玉生^b, 王波^c

a School of Science, Xidian University, Xi'an 710071, China;
b China Research Institute of Radio Wave Propagation, Qingdao 266107, China;
c Institute of Oceanographic Instrumentation, Qingdao 266001, China

收稿日期:2012-02-28 修回日期:2012-05-14 出版日期:2012-09-01 发布日期:2012-09-01
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61172031 and 41175012).

Propagation modeling of ocean-scattered low-elevation GPS signals for maritime tropospheric duct inversion

Zhang Jin-Peng (张金鹏)^a, Wu Zhen-Sen (吴振森)^a, Zhao Zhen-Wei (赵振维)^b, Zhang Yu-Sheng (张玉生)^b, Wang Bo (王波)^c

a School of Science, Xidian University, Xi'an 710071, China;
b China Research Institute of Radio Wave Propagation, Qingdao 266107, China;
c Institute of Oceanographic Instrumentation, Qingdao 266001, China

Received:2012-02-28 Revised:2012-05-14 Online:2012-09-01 Published:2012-09-01
Contact: Wu Zhen-Sen E-mail:wuzhs@mail.xidian.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61172031 and 41175012).

摘要/Abstract

摘要： The maritime tropospheric duct is a low-altitude anomalous refractivity structure over the ocean surface, and it can significantly affect the performance of many shore-based/shipboard radar and communication systems. We propose the idea that maritime tropospheric ducts can be retrieved from ocean forward-scattered low-elevation global positioning system (GPS) signals. Retrieval is accomplished by matching the measured power patterns of the signals to those predicted by the forward propagation model as a function of the modified refractivity profile. On the basis of a parabolic equation method and bistatic radar equation, we develop such a forward model for computing the trapped propagation characteristics of an ocean forward-scattered GPS signal within a tropospheric duct. A new GPS scattering initial field is defined for this model to start the propagation modeling. A preliminary test on the performance of this model is conducted using measured data obtained from a 2009-experiment in the South China Sea. Results demonstrate that this model can predict GPS propagation characteristics within maritime tropospheric ducts and serve as a forward model for duct inversion.

关键词: global positioning system, ocean surface scattering, propagation modeling, tropospheric duct inversion

Abstract: The maritime tropospheric duct is a low-altitude anomalous refractivity structure over the ocean surface, and it can significantly affect the performance of many shore-based/shipboard radar and communication systems. We propose the idea that maritime tropospheric ducts can be retrieved from ocean forward-scattered low-elevation global positioning system (GPS) signals. Retrieval is accomplished by matching the measured power patterns of the signals to those predicted by the forward propagation model as a function of the modified refractivity profile. On the basis of a parabolic equation method and bistatic radar equation, we develop such a forward model for computing the trapped propagation characteristics of an ocean forward-scattered GPS signal within a tropospheric duct. A new GPS scattering initial field is defined for this model to start the propagation modeling. A preliminary test on the performance of this model is conducted using measured data obtained from a 2009-experiment in the South China Sea. Results demonstrate that this model can predict GPS propagation characteristics within maritime tropospheric ducts and serve as a forward model for duct inversion.

Key words: global positioning system, ocean surface scattering, propagation modeling, tropospheric duct inversion

中图分类号: (Ocean/atmosphere interactions, air/sea constituent fluxes)

92.60.Cc

41.20.Jb (Electromagnetic wave propagation; radiowave propagation)

张金鹏, 吴振森, 赵振维, 张玉生, 王波. Propagation modeling of ocean-scattered low-elevation GPS signals for maritime tropospheric duct inversion[J]. 中国物理B, 2012, 21(10): 109202-109202.

Zhang Jin-Peng (张金鹏), Wu Zhen-Sen (吴振森), Zhao Zhen-Wei (赵振维), Zhang Yu-Sheng (张玉生), Wang Bo (王波). Propagation modeling of ocean-scattered low-elevation GPS signals for maritime tropospheric duct inversion[J]. Chin. Phys. B, 2012, 21(10): 109202-109202.

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Propagation modeling of ocean-scattered low-elevation GPS signals for maritime tropospheric duct inversion

Propagation modeling of ocean-scattered low-elevation GPS signals for maritime tropospheric duct inversion

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