Utilization of Altimetry Satellites Microwave Radiometer for Atmospheric Observation over Indonesia

Abstract Altimetry satellites have an on-board microwave radiometer whose original function is to measure the Tropospheric Wet Delay (TWD) for their main sea level measurement using radar altimeter. The TWD, as it reflects amount of water vapor in atmosphere, could be used derive Precipitable Water Vapor (PWV) which would a good parameter study atmosphere variability, especially Indonesia where rainfall variable its climate. Studies on altimetry-derived PWV are conducted, include: analyzing correlation with observation dataset, and assessing how well they capture some key atmospheric phenomena Indonesia. results show that there fairly high between data monthly-scale 0.63 Pearson coefficient. Moreover, very such monsoon El Niño Southern Oscillation (ENSO) variation. Thus, new way utilizing altimetry satellite introduced this paper: observe derived from radiometer. This open possibility both oceanographic meteorological studies measures oceanic parameter, altimeter radiometer, respectively.