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首页> 外文期刊>Journal of hydrometeorology >Comparison of TRMM 2A25 products, version 6 and version 7, with NOAA/NSSL ground radar-based national mosaic QPE
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Comparison of TRMM 2A25 products, version 6 and version 7, with NOAA/NSSL ground radar-based national mosaic QPE

机译：比较TRMM 2A25产品，版本6和版本7与基于NOAA / NSSL地面雷达的国家拼接QPE

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摘要

Characterization of the error associated with satellite rainfall estimates is a necessary component of deterministic and probabilistic frameworks involving spaceborne passive and active microwave measurements for applications ranging from water budget studies to forecasting natural hazards related to extreme rainfall events. The authors focus here on the relative error structure of Tropical Rainfall Measurement Mission (TRMM) precipitation radar (PR) quantitative precipitation estimation (QPE) at the ground by comparison of 2A25 products with reference values derived from NOAA/NSSL's ground radar-based National Mosaic and QPE system (NMQ/Q2). The primary contribution of this study is to compare the new 2A25, version 7 (V7), products that were recently released as a replacement of version 6 (V6).Moreover, the authors supply uncertainty estimates of the rainfall products so that theymay be used in a quantitative manner for applications like hydrologic modeling. This new version is considered superior over land areas and will likely be the final version for TRMMPR rainfall estimates. Several aspects of the two versions are compared and quantified, including rainfall rate distributions, systematic biases, and random errors. All analyses indicate that V7 is in closer agreement with the reference rainfall compared to V6.
机译：与卫星降雨估计有关的误差的表征是确定性和概率性框架的必要组成部分，涉及空间星载无源和有源微波测量，其应用范围从水预算研究到预测与极端降雨事件有关的自然危害。通过将2A25产品与从NOAA / NSSL的基于地面雷达的National Mosaic得出的参考值进行比较，作者将重点放在了热带雨量测量任务（TRMM）降水雷达（PR）定量降水估计（QPE）的相对误差结构上。和QPE系统（NMQ / Q2）。本研究的主要贡献是比较新发布的2A25版本7（V7）替代版本6（V6）。此外，作者提供了降雨产品的不确定性估算值，以便可以使用以定量方式应用于水文建模等应用。该新版本被认为比陆地地区优越，并且可能是TRMMPR降雨量估算的最终版本。对两个版本的几个方面进行了比较和量化，包括降雨率分布，系统偏差和随机误差。所有分析都表明，与V6相比，V7与参考降雨量更加接近。

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