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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Toward More Representative Gridded Satellite Products
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Toward More Representative Gridded Satellite Products

机译:走向更具代表性的网格卫星产品

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摘要

The most widely used satellite products are averages of data onto a regular spatiotemporal grid, known as Level 3 data. Some atmospheric variables can vary rapidly in response to changing conditions. Over the scales of Level 3 averaging, the combination of observations across different conditions may result in data that is not normally distributed, such that a simple mean is not representative. The problem is illustrated by the distribution of aerosol optical depth from different sensors and algorithms. A simple statistical technique is proposed to better convey the diversity of satellite observations to users whereby a multimodal log-normal distribution is fit to the distribution of data observed within each grid cell. Allowing multiple modes within each cell is shown to improve the agreement between satellite products by highlighting regions of significant variability and isolating systematic differences between instruments.
机译:最广泛使用的卫星产品是常规时空网格的数据的平均值,称为3级数据。一些大气变量可以响应不断变化的条件而迅速变化。在级别3的平均尺度上,不同条件的观察组合可能导致通常不分布的数据,使得简单的均值不是代表性的。通过来自不同传感器和算法的气溶胶光学深度的分布来说明问题。提出了一种简单的统计技术,以更好地传达给用户的卫星观察的多样性,由此多模式对数正态分布适合在每个网格单元内观察到的数据的分布。允许在每个单元中允许多种模式,通过突出显示显着变异性的区域和隔离仪器之间的系统差异来改善卫星产品之间的协议。

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