论文标题
Eumetsat Avhrr/Metop卫星生成全球植被产品
Generation of global vegetation products from EUMETSAT AVHRR/METOP satellites
论文作者
论文摘要
我们描述了用于从高级高分辨率辐射计（AVHRR）在气象运行（METOP）极性轨道卫星上检索全球LAI，FAPAR和FVC的方法，也称为Eumetsat Polar System（EPS）。已经开发了一种新的方法，用于针对三个参数（LAI，FVC和FAPAR）的联合检索，而不是每个参数训练一个模型。该方法依赖于对Prosail EPS模拟训练的多输出高斯流程回归（GPR）。进行灵敏度分析以评估检索中不确定性的几种来源，并最大程度地对训练模拟中的噪声进行建模的积极影响。我们描述了操作加工链的主要特征以及全球EPS植被产品的当前状态，包括有关其基于与同等（MODIS，Proba-V）卫星植被产品比较的产品的整体质量和初步评估的详细信息。
We describe the methodology applied for the retrieval of global LAI, FAPAR and FVC from Advanced Very High Resolution Radiometer (AVHRR) onboard the Meteorological-Operational (MetOp) polar orbiting satellites also known as EUMETSAT Polar System (EPS). A novel approach has been developed for the joint retrieval of three parameters (LAI, FVC, and FAPAR) instead of training one model per parameter. The method relies on multi-output Gaussian Processes Regression (GPR) trained over PROSAIL EPS simulations. A sensitivity analysis is performed to assess several sources of uncertainties in retrievals and maximize the positive impact of modeling the noise in training simulations. We describe the main features of the operational processing chain along with the current status of the global EPS vegetation products, including details about its overall quality and preliminary assessment of the products based on intercomparison with equivalent (MODIS, PROBA-V) satellite vegetation products.
