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Document Type

Original Study

Abstract

To achieve the goals of sustainability, hydrological studies require analysis and modeling of precipitation data, in an accurate and reliable manner. However, measurements of precipitation ought to be more accurate representations of the actual distribution of precipitation. The methods and methods used to gather data on precipitation are numerous. With the advent of satellite products, namely, the Tropical Rainfall Measuring Mission (TRMM) precipitation, which can be used to estimate and analyze precipitation data, hydro-meteorological and climatological applications of satellite precipitation products have recently seen a significant improvement. In this study, the Iraqi Meteorological and Seismology Organization (IMSO) gathered ground-based rain gauge data at eight sites in Iraq that represent various climatic zones for the years 2010 to 2020 with the goal of validating the TRMM rainfall products. To conduct station-based assessments, statistical performance metrics are used to evaluate the correctness of each IRMM product. The findings indicated that rainfall significantly varied from one season to the next, and this tendency was seen in both sets of data. In most rainy season months, it was discovered that TRMM readings overstate rainfall. The findings show that the run product performed admirably in the country's southern, northern, and western regions, whereas the satellite estimations for the center regions alternated between being overestimated and underestimated. This research offers a preliminary evaluation of the IRMM satellite products' functionality over Iraq. The study's findings can be helpfully utilized as a reference for rural and arid regions where there are no devices for detecting rain.

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