• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Geoscience and Remote Sensing Symposium, 1996. IGARSS '96. 'Remote Sensing for a Sustainable Future.', International >Scattering and emission from dry snow in the range 35-140 GHz
【24h】

Scattering and emission from dry snow in the range 35-140 GHz

机译：35-140 GHz范围内的干雪散射和发射

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Scattering and emission models for an irregular layer of dense inhomogeneous medium is developed and applied in the analysis of dry snow scattering and emission in the range 35-140 GHz. The models are developed based on the matrix doubling formulation, and accounts for full incoherent multiple scattering inside the snow layer. The effects of close spacing and first order coherent interactions between scatterers inside the snow layer are included in the model via a dense medium phase matrix. The dense medium phase matrix is derived using the extended concept of three-dimensional antenna array theory which accommodate randomly located scatterers. The final expression for the dense medium phase matrix differs from the conventional (sparse medium) one in two major aspects in that there is an amplitude and a phase correction. The rough interfaces of the air-snow and snow-ground (or snow-ice) boundaries are modeled using the IEM rough surface model. Emission model predictions agree well with field measurements reported in the literature. Backscattering calculations from the theory are compared with measurements from field measurements of dry snowpack. Predictions from such a theory agree well with the measured data.
机译：建立了不均匀稠密介质不规则层的散射和发射模型，并将其用于分析35-140 GHz范围内的干雪散射和发射。这些模型是基于矩阵加倍公式开发的，并说明了雪层内部完全不相干的多重散射。通过密集的中相矩阵将雪层内部散射体之间的紧密间距和一阶相干相互作用的影响包括在模型中。密集介质相位矩阵是使用三维天线阵列理论的扩展概念导出的，该理论适用于随机放置的散射体。稠密介质相位矩阵的最终表达式与常规（稀疏介质）的主要区别在于两个方面，即振幅和相位校正。使用IEM粗糙表面模型对气雪和雪地面（或冰雪）边界的粗糙界面进行建模。排放模型的预测与文献中报道的现场测量非常吻合。将理论上的反向散射计算结果与干燥积雪堆的现场测量结果进行了比较。这种理论的预测与实测数据非常吻合。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号