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vol.33 número1Variabilidade Espaço-Temporal das Tendências de Precipitação na Mesorregião Sul Cearense e sua Relação com as Anomalias de TSMNormais Climatológicas Provisórias de 1991 a 2010 para Rio Grande, RS índice de autoresíndice de assuntospesquisa de artigos
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Revista Brasileira de Meteorologia

versão impressa ISSN 0102-7786versão On-line ISSN 1982-4351

Resumo

SILVA LELIS, Luísa Carolina; DUARTE BOSQUILIA, Raoni Wainer  e  DUARTE, Sergio Nascimento. Assessment of Precipitation Data Generated by GPM and TRMM Satellites. Rev. bras. meteorol. [online]. 2018, vol.33, n.1, pp.153-163. ISSN 0102-7786.  http://dx.doi.org/10.1590/0102-7786331004.

This study aimed to verify the performance of the information produced by the GPM (Global Precipitation Measurement) mission and TRMM (Tropical Rainfall Measurement Mission) on the eastern region of São Paulo state, based on a comparison of rainfall data from DAEE (Department of Waters and Electric Energy of São Paulo State). The comparison was done by comparing spatially aggregated information from both sources. In order to analyze the results, we measured: (1) Relative Difference, (2) BIAS and (3) Root Mean Square Error (RMSE). It was found that the relative differences were in the range of -20% to 20% for both missions. Analyzing the BIAS for both satellites it was observed that 68% of the measurements were overestimated. The highest agreement was obtained for the mesoregion of Campinas and the lowest for Araraquara. In the TRMM, the lowest RMSE values were found in the Araraquara mesoregion and the highest in Piracicaba. In the GPM the closest measured values were observed in the Piracicaba mesoregion, while the most distant values were identified in Araraquara. All the analyzes of this work demonstrated similarity between the errors generated by both satellites. New comparison studies are needed to better understand the products.

Palavras-chave : precipitation; GPM; TRMM; rainfall estimated by satellite.

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