Evaluation of Precipitation Products Against Rain Gauges with Respect to Precipitation Classes and the Possible Positive Impact of Pre-processing

In the article, we evaluate ten precipitation products against rain gauges. The time coverage consists of 25 days in different years, seasons and average daily totals. The metrics used are correlations and RMSE, which we categorize by precipitation classes. According to the measured results, the products with the highest average correlations and the lowest average RMSE values are EURAD, Icon and Icon-EU. We have recorded the positive impact of applying different types of pre-processing to precipitation products.