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A local post-retrieval tool for satellite precipitation estimates

机译:用于卫星降水估计的本地检索后工具

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摘要

As illustrated by several literature case studies spread around di erent geographic locations, satellite precipi-\udtation estimates, obtained by means of consolidated algorithms, often result being considerably biased. Moreover\udobserved bias is related to geographic location since particular features such as latitude, presence of coastal areas\udand climatological and weather regime, a ect performances of satellite estimates. Bias adjusted products that\udmake use of global ground-based precipitation estimates, are available as well but still these datasets may show\uda relevant bias level. In this study a procedure to bias-adjust satellite precipitation estimates has been devel-\udoped for the local area of Sicily (Italy) based on rain-gauge network data. Considering that the latency time of\udsatellite precipitation estimates is nowadays very short and close to that of satellite data availability, it has been\udinvestigated the possibility of designing a procedure that able to apply the bias reduction to satellite estimates\udwithout timely corresponding rain-gauge network data. Therefore, in order to obtain a tool that make available\uda rst precipitation map estimate, the emphasis has been put on data readiness instead of achieving the best\udcorrection result. The developed procedure demonstrate to be able to improve the overall bias performances\udof examined satellite precipitation data. It is expected that such an approach increases its suitability as the\uddeveloping of satellite estimates algorithms leads to better a description of rainfall dynamics.
机译:如一些文献案例研究遍布不同地理位置所表明的那样,借助合并算法获得的卫星降水估算通常会产生很大的偏差。此外,\ bowserved偏差与地理位置有关,因为特定的特征,例如纬度,沿海地区的存在\ udand气候和天气状况,卫星估计的性能。也可以使用经过偏差调整的产品(使用全球地面降水量估算值),但这些数据集仍可能显示(或)相关的偏差水平。在这项研究中,根据雨量计网络数据,为西西里岛(意大利)的本地地区开发了一种偏差调整卫星降水估计的程序。考虑到当今\ udsatell降水估算的等待时间非常短并且接近卫星数据的获取时间,因此已经\ ud调查了设计一种程序的可能性,该程序可以将偏差减少应用于卫星估算\ ud而无需及时进行相应的降雨,测量网络数据。因此,为了获得一个能提供最新的降水图估计值的工具,人们将重点放在了数据准备上,而不是获得最佳的\校正结果。所开发的程序证明能够改善所检查的卫星降水数据的总体偏差性能。预计这种方法将增加其适用性,因为卫星估算算法的发展将更好地描述降雨动态。

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