A Comprehensive Emission Model for Layered Inhomogeneous Medium with Application to Passive Remote Sensing of Snow and Ice Layers

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS Pub Date : 2021-07-11 DOI:10.1109/IGARSS47720.2021.9554703

Dongjin Bai, Xiaolong Dong, S. Tjuatja, Di Zhu

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引用次数: 2

Abstract

Microwave emission from layered inhomogeneous medium is affected by both incoherent scattering and coherent interaction within the layer. Reported emission observations of snow-covered surface and ice sheet indicate that effects of layer boundary interference are more prominent at low frequencies. This paper presents a comprehensive layer emission model (CLEM) for layered inhomogeneous medium that fully accounts for incoherent scattering and coherent boundary interactions within the layer. The CLEM model is based on scattering operator (matrix doubling) formulation, which provides the basic framework for integrating rough boundary scattering, volume scattering, and coherent multiple reflections at layer boundaries. Coherent boundary interactions are accounted for through novel integrated wave- and intensity-based layer scattering operators. Initial model validation using published Elbara-II data and SodRad data shows good agreement between CLEM predictions and measured results.

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层状非均匀介质综合发射模型及其在冰雪被动遥感中的应用

层状非均匀介质的微波发射受到层内非相干散射和相干相互作用的双重影响。已有的积雪地表和冰盖的辐射观测表明，层边界干扰的影响在低频时更为突出。本文提出了层状非均匀介质的综合层发射模型(CLEM)，充分考虑了层内的非相干散射和相干边界相互作用。CLEM模型基于散射算子(矩阵加倍)公式，为粗糙边界散射、体散射和层边界相干多次反射的积分提供了基本框架。通过新颖的基于波和强度的层散射算子来解释相干边界相互作用。利用Elbara-II数据和SodRad数据进行的初步模型验证表明，CLEM预测结果与实测结果吻合良好。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS

CiteScore

1.20

自引率

0.00%

发文量