Abstract

AbstractCloud data can be obtained through direct observation, and by using models on radiosonde or satellite data. Cloud observations in real time will be very helpful in predicting the potential for rain events in a place. Ceilometer CT25K can observe the cloud base height for three cloud layers up to 7.5 km. In this study, Ceilometer CT25K data was used to determine the average cloud base height in December January February (DJF), March April May (MAM), June July August (JJA), and September October November (SON) during 2016–2018. The average cloud base height in Kototabang is compared to the Lifted Condensation Level (LCL) of the Radiosonde. Furthermore, Himawari-8 Geostationary Satellite data was used to confirm the presence of the clouds. The result shows that there is a difference in the cloud base height of the Radiosonde (LCL) with the cloud base height from the Ceilometer. The Brightness Temperature (TB) value of Band 13 of the Himawari-8 Geostationary Satellite observation in the same period shows that the average cloud top temperature is ranging from 240 to 270 K.KeywordsCeilometerRadiosondeHimawari-8Cloud base heightLCL

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