Evaluation of satellite precipitation products over Mexico using Google Earth Engine

Abstract Satellite-based precipitation products and reanalysis have the potential to overcome lack of information in regions where there are no or insufficient rain gauges achieve any hydrological study. The Google Earth Engine (GEE) data analysis platform has its repository with global coverage that offers different geospatial capable measuring amount precipitation. However, it is necessary evaluate reliability products. There biases Mexico due scarce presence gauging stations, failed operations, access difficulty, capture errors. This study evaluates satellite hosted GEE against gauge observation from 2001 2017 using 4,658 stations over Mexico. evaluation was carried out statistical indicators comparing behavior across topographic, climatic, temporal conditions. results exhibit performance seems depend on elevation conditions for other climatic show all can general patterns at annual, seasonal, monthly scales; however, accuracy product clearly lower a daily scale. All highly biased low events.