Comparación entre imágenes satelitales GPM (Global Precipitation Measurement) y TRMM (Tropical Rainfall Measuring Mission) para la caracterización de la lluvia en la cuenca del río Paute

Abstract

The insufficient spatial information about the precipitation of the Paute river basin, the shortage of continuous precipitation in a series of time during some available weather seasons in the basin and the existence of limited databases on a temporary level and space of some institutions, are conditions that do not allow further or deeper study. For this reason, this study is proposed, with the objective of comparing precipitation using satellite products and data series provided by INAMHI, from April of 2014 until December of 2015. At present, the most recent satellite has a mission for the GPM (Global Precipitation Measurement) to replace the TRMM satellite service (Tropical Rainfall Measuring Mission). The analysis was performed by calculating qualitative and quantitative indicators for comparison of daily and monthly data. Also, the SPI 1 and SPI 3. In this investigation, the satellite products overestimate and underestimate the precipitation with respect to rainfall stations, whereas, the satellite precipitation products have a minimal variation. The results show us that the TRMM mission better detects the daily scale precipitation, meanwhile, the GPM mission stands out on a monthly scale. It was also identified that the height of the basin study stations is not one of the variables that influences the uptake of the precipitation. In addition, as it was observed on the SPI 1 and SPI 3 maps, GPM presents a more detailed classification of the index.