Uso de imagens de satélite no controle de registros pluviométricos por estações meteorológicas automáticas.

Abstract

This work used the one-dimensional cloud model for the generation of metadata for the rainfall data collected by Automatic Weather Stations Surface (EMAS). For this, we used data of air temperature and dew point at the surface and satellite images in the thermal infrared channel . Such metadata seek to complement the metadata of EMAS for analysis and control of quality. Were generated metadata height of the cloud top and cloud cover in an area of 5x5 pixels and also the counting the number of hours that was present convective systems on each of the 454 automatic weather stations that transmitted data between 01/08/2012 and 31/12/2012. Also, regression statistics were performed to determine the relationship between the height of the cloud top and rain gauges, as well as the adjustment of the precipitation data greater than or equal 5 mm/h to a beta probability distribution. The metadata generated were useful for the analysis and identification of suspicious data present in INMET database, showing the cases without rain cloud or clouds do not precipitate relation to the volume ( Bacabal / GO ) , and also cases in which the station not even during rain recorded over 100 hours in presence of convective systems ( Goioere / PR )