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首页> 外文期刊>Remote Sensing Reviews >The Impact of Multi-angular Measurements on the Accuracy of Land-surface Albedo Retrieval: Preliminary Results For the Proposed ESA LSPIM Mission
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The Impact of Multi-angular Measurements on the Accuracy of Land-surface Albedo Retrieval: Preliminary Results For the Proposed ESA LSPIM Mission

机译：多角度测量对陆面反照率反演精度的影响：ESA LSPIM拟议任务的初步结果

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摘要

This paper documents, through a sensitivity study, the retrieval accuracy of the albedo and the bidirectional reflectance factor (BRF) field as a function of the number of observations and their angular distribution. A BRF data base is generated for different surface types, solar positions, and wavelengths. A realistic amount of random noise is added to approximate actual measurement conditions. A parametric BRF model is inverted against the noisy data strings of variable lengths and subsequently used in a forward mode to reconstruct the BRF field and estimate the albedo. The retrieval accuracy is estimated by comparing the original and the reconstructed fields and values. For a single observation, the retrieval accuracy based on the assumption of a Lambertian surface reflectance is compared to he one base don the assumption of a typical BRF field.
机译：通过敏感性研究，本文记录了反照率和双向反射系数（BRF）场的反演精度与观测次数及其角度分布的关系。针对不同的表面类型，太阳位置和波长生成BRF数据库。实际数量的随机噪声被添加到近似实际测量条件。将参数化BRF模型与可变长度的嘈杂数据串进行反演，然后在前向模式下使用它来重构BRF场并估计反照率。通过比较原始字段和重构的字段和值来估计检索精度。对于单个观察，将基于朗伯表面反射率假设的检索精度与典型BRF场假设的一个基准进行比较。

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