GPS meteorology in a low-latitude region: Remote sensing of atmospheric water vapor over the Malaysian Peninsula

► This study presents an accuracy assessment of GPS-derived IWV in Peninsular Malaysia. ► Strong correlation is found between GPS-derived IWV and radiosonde-derived IWV. ► Diurnal variation of GPS-derived IWV show Northeast is stronger than Southwest monsoon. ► GPS for meteorology has the potential to be used for locations with few weather stations.