Evaluation of the data produced by the s band weather radars network located in central southern Brazil / Avaliação dos dados produzidos pela rede de radares meteorológicos de banda "S" localizados no centro sul do Brasil

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

Data from the weather radars located in central, southeastern and southern Brazil has been used by the CPTEC and DECEA since the agreement between both institutions was signed in 2004. Before this date the radar data was used by flight protection purposes only, and was not stored. Nowadays, the radar products derived from the scanning strategy of all radars are recorded and then sent to the CPTEC and DECEA. The quality of the data was not evaluated yet, and for applications like nowcasting, data assimilation and rainfall estimation it is necessary to guarantee that the data are good enough to be used. Therefore, the main goal of this assignment was to evaluate the quality of the data produced by the radar network using the information acquired by the TRMM-PR (Tropical Rainfall Measurement Mission Precipitation Radar) as reference. The results showed that in most cases (excepting Gama) the ground radars tend to overestimate reflectivity values when compared with PR. It was also showed that São Roque requires attention due to its large offset and noises present in its products. The differences found in the remaining radars were related to the time difference between the data acquisition of the two types of sensors (ground and orbital radars).

ASSUNTO(S)

meteorologia tropical rainfall measuring mission (trmm) meteorologia radar meteorológico precipitation radar (pr) meteorology missão de medição da chuva tropical (trmm) weather radar department of air space control (decea) radar de precipitação (pr) departamento de controle do espaço aéreo (decea)

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