Radar Quantitative Precipitation Estimation (QPE) Calibration Methods: A Systematic Literature Review

High-quality Quantitative Precipitation Estimation (QPE) beyond a sizable area with high spatial and temporal precision is important for many hydrological and meteorological applications. The development of the weather radar over the past 60 years has made it possible for QPE to effectively identify the rainfall location and has enabled the former’s use in actual hydrometeorological processes such as flood forecasting. These capabilities are made possible by the radar QPE's exceptionally high temporal and spatial resolutions. Through the enhancement of radar QPE for rainfall estimation, this research contributes to the field by offering critical analysis and assessment of the focus studies. The current study takes into account publications from reputable internet search libraries published between 2010 and 2023. The former will help academics analyze the most recent work on radar QPE, adopting the most advanced and improved techniques, and provide a baseline for future comparisons and directions.