The document summarizes the activities of the Geostech Laboratory related to the CEOP reference site. It provides an overview of the laboratory and its instrumentation including an automatic weather station, GPS for water vapor, Doppler sodar, and radiosonde at the Kototabang Observatory reference site. It describes intensive observation periods conducted from 2001-2004 to collect data on the atmospheric conditions during different seasons. The laboratory also hosts workshops to disseminate scientific results and support application of climate information for agriculture.