NASA HRAC Project

This is a dataset that enhances the TMPA monthly product (3B43) in its accuracy and spatial resolution, in hydrometeorological applications. About 9,200 gauge measurement are used to compare with the 3B43 product at 0.25° x 0.25° spatial resolution across the CONUS. Observed is a strong relationship between the bias and land surface elevation, in which 3B43 underestimates the true precipitation at the elevations above 1,500 m amsl. Satellite data is resampled to elevation data at ~1km grid size and applied a correction function to reduce bias in the data. Accordingly, a High-Resolution Altitud...本数据集面向水文气象应用需求，旨在提升TMPA月度产品（3B43）的精度与空间分辨率。研究以美国本土（CONUS）范围内约9200个雨量站的实测数据为基准，与空间分辨率为0.25°×0.25°的3B43产品开展对比验证。研究发现偏差与地表高程存在显著相关关系：当海拔高于1500米（amsl）时，3B43产品会低估实际降水量。将卫星数据重采样为约1公里网格的高程数据，并通过校正函数修正数据偏差。据此，本数据集构建了高分辨率高程（High-Resolution Altitud...）