| DOI: | 10.2172/1022929
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| 报告号: | LLNL-TR-493312
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| 报告题名: | Wave-Based Subsurface Guide Star |
| 作者: | Lehman, S K
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| 出版年: | 2011
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| 发表日期: | 2011-07-26
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| 总页数: | 8
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| 国家: | 美国
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| 语种: | 英语
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| 中文主题词: | 雷达
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| 主题词: | RADAR
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| 英文摘要: | Astronomical or optical guide stars are either natural or artificial point sources located above the Earth's atmosphere. When imaged from ground-based telescopes, they are distorted by atmospheric effects. Knowing the guide star is a point source, the atmospheric distortions may be estimated and, deconvolved or mitigated in subsequent imagery. Extending the guide star concept to wave-based measurement systems to include acoustic, seismo-acoustic, ultrasonic, and radar, a strong artificial scatterer (either acoustic or electromagnetic) may be buried or inserted, or a pre-existing or natural sub-surface point scatterer may be identified, imaged, and used as a guide star to determine properties of the sub-surface volume. That is, a data collection is performed on the guide star and the sub-surface environment reconstructed or imaged using an optimizer assuming the guide star is a point scatterer. The optimization parameters are the transceiver height and bulk sub-surface background refractive index. Once identified, the refractive index may be used in subsequent reconstructions of sub-surface measurements. The wave-base guide star description presented in this document is for a multimonostatic ground penetrating radar (GPR) but is applicable to acoustic, seismo-acoustic, and ultrasonic measurement systems operating in multimonostatic, multistatic, multibistatic, etc., modes. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1022929
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/40389
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1022929.pdf（4146KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Lehman, S K. Wave-Based Subsurface Guide Star. 2011-01-01.
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