SENSITIVITY OF MICROWAVE MEASUREMENTS TO VEGETATION BIOMASS AND SOIL-MOISTURE CONTENT - A CASE-STUDY
SENSITIVITY OF MICROWAVE MEASUREMENTS TO VEGETATION BIOMASS AND SOIL-MOISTURE CONTENT - A CASE-STUDY
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DOI：
10.1109/36.158869
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发表时间：
1992-07-01
影响因子：
8.2
通讯作者：
COPPO, P
中科院分区：
文献类型：
--
作者：
FERRAZZOLI, P;PALOSCIA, S;COPPO, P
对主动和被动微波传感器在估算植被生物量和土壤水分方面的潜力进行了比较评估。为此目的，使用了在1988年农业和农业发展运动期间由机载散射计和辐射计在农业区收集的实验数据。结果表明，在较宽的频率范围内，微波后向散射和辐射对植被生物量都很敏感。多频观测似乎为区分宽叶和小叶草本作物以及检测不同的生长阶段提供了很好的可能性。在陡峭入射角(10度)下的低频(L波段)数据证实，后向散射系数和归一化温度都是相关的，并且对土壤水分敏感。
A comparative evaluation of the potential of active and passive microwave sensors in estimating vegetation biomass and soil moisture content is carried out. For this purpose, experimental data collected on an agricultural area, by airborne scatterometers and radiometers, during the AGRISCATT and AGRIRAD 1988 Campaigns, have been used. The results show that both microwave backscattering and emission are sensitive to vegetation biomass over a wide frequency range. Multifrequency observations seem to offer good probabilities for separating wide leaf from small leaf herbaceous crops, and for detecting different growth stages. Low frequency data (L band) at a steep incidence angle (10-degrees) confirm that both the backscattering coefficient and the normalized temperature are correlated and sensitive to soil moisture content.