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Observations and theory of polarimetric backscatter from snowcover at 35, 95 and 225 GHz.

机译：积雪在35、95和225 GHz的偏振反向散射的观测和理论。

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This dissertation presents 35, 95 and 225 GHz polarimetric backscatter data from snowcover. It compares measured backscatter data with detailed in situ data measurements of the snowcover including microstructural anisotropies within the snowpack. Observations of radar backscatter at 35, 95 and 225 GHz were made during melt-freeze cycles, and measurable differences in the normalized radar cross-section (NRCS) between older metamorphic snow and fresh low density snow were observed. In addition, our polarimetric measurements show that the average phase difference between the co-polarized terms of the scattering matrix, {dollar}Ssb{lcub}vv{rcub}{dollar} and {dollar}Ssb{lcub}hh{rcub}{dollar}, is nonzero for certain snow types. These measurements are explained by the effects that the microstructure of the snow has on propagation within the snowpack. A simple vector radiative transfer model that includes the propagation effects is seen to predict the Mueller matrix for dry snowcover reasonably well.

机译：本文介绍了积雪覆盖的35、95和225 GHz极化背向散射数据。它将测得的反向散射数据与积雪的详细现场数据测量结果进行比较，包括积雪内部的微观结构各向异性。在融化冻结周期中对雷达在35、95和225 GHz处的反向散射进行了观测，并且观测到较旧的变质雪与新鲜的低密度雪之间的归一化雷达横截面（NRCS）有可测量的差异。此外，我们的极化测量结果表明，散射矩阵的同极化项{dollar} Ssb {lcub} vv {rcub} {dollar}和{dollar} Ssb {lcub} hh {rcub} {美元}，对于某些雪类型，该值非零。这些测量结果是由雪的微观结构对雪堆内部传播的影响所解释的。可以看到一个包含传播效应的简单矢量辐射传递模型可以很好地预测干雪覆盖的穆勒矩阵。

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作者
Chang, Paul Sze-Po.;
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作者单位

University of Massachusetts Amherst.;

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授予单位 University of Massachusetts Amherst.;
学科 Engineering Electronics and Electrical.
学位 Ph.D.
年度 1994
页码 114 p.
总页数 114
原文格式 PDF
正文语种 eng
中图分类无线电电子学、电信技术;
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1. Polarimetric backscatter from fresh and metamorphic snowcover atmillimeter wavelengths [J] . Chang P.S., Mead J.B., Knapp E.J., IEEE Transactions on Antennas and Propagation . 1996,第1期

机译：来自毫米波波长的新鲜和变质积雪的偏振反向散射
2. Polarimetric backscatter from fresh and metamorphic snowcover at millimeter wavelengths [J] . Chang P.S., Mead J.B. IEEE Transactions on Antennas and Propagation . 1996,第1期

机译：来自毫米波波长的新鲜和变质积雪的偏振反向散射
3. Polarimetric observations and theory of millimeter-wave backscatter from snow cover [J] . Mead J.B., Chang P.S. IEEE Transactions on Antennas and Propagation . 1993,第1期

机译：积雪的毫米波反向散射的极化观测和理论
4. Polarimetric observations of millimeter-wave backscatter from snowcover at 95 and 225 GHz [C] . Chang, P.S., Mead, . 1992

机译：积雪在95和225 GHz下对毫米波反向散射的极化观测
5. Forward scatter polarimetric measurements of terrain at 35 and 225 GHz. [D] . Baker, Jeffrey M. 1998

机译：35和225 GHz地形的前向散射极化测量。
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8. Polarimetric Observations and Theory of Millimeter-Wave Backscatter from SnowCover [R] . Mead, J. B., Chang, P. S., Lohmeier, S. P., 1993

机译：snowCover的毫米波背向散射的极化观测与理论

Observations and theory of polarimetric backscatter from snowcover at 35, 95 and 225 GHz.

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