PERBANDINGAN DATA ATMOSFER-LAUT HASIL PENGUKURAN SATELIT WINDSAT DAN RAMA BUOY DI SEPANJANG EKUATOR SAMUDERA INDIA
Daftar Isi:
- Ocean-atmosphere data from the Research Moored Array for African–Asian–Australian Monsoon Analysis and Prediction (RAMA) buoys deployed along the equatorial Indian Ocean were used for validating the ocean-atmosphere data recorded by the WindSat satellite. Three RAMA buoys mounted at 67oE, 80.5oE and 90oE along the equator were used to evaluate the sea surface temperature (SST), wind speeds and precipitation obtained by the WindSat satellite during 2013 – 2015, except for precipitation in the eastern equatorial Indian Ocean (2006 – 2009). The SST from WindSat shows significant correlation with that from RAMA buoy, with coefficient correlations of 0.95, 0.88 and 0.83 in each RAMA buoys, respectively. The root mean square errors (RMSEs) of the WindSat SST relative to RAMA buoy data were 0.28, 0.29 and 0.32 oC, respectively. in this study. The quality performances of the WindSat wind speed were also satisfactory, with coefficient correlation of 0.64, 0.7 and 0.58 in each RAMA buoy, respectively. The corresponding RMSEs of the wind speeds were 1.46, 1.37 and 1.63 m s-1, respectively. Meanwhile, the WindSat precipitations reveal weak correlation with RAMA buoy data, in particular in the eastern equatorial Indian Ocean. The coefficient correlations in each RAMA buoys were 0.41, 0.27 and 0.2, respectively. The corresponding RMSEs of the precipitation were 0.61, 0.52 and 1.18 mm/day, respectively. After have done correlation and analysis toward measurement errors, overall the WindSat satellite data for each measurement parameters can be used to replace in-situ observation data.