DUCAS, Detection in Urban scenario with Combined Airborne Sensor, is an EDA project funded by the seven participating countries. The DUCAS consortium is planning a major field trial in Zeebrugge, Belgium, during summer 2011. Since the DUCAS main trial will be extensive, with sensors, data, and processing distributed over several nations, a pre-trial exercise is planned, mainly in the form of data sharing and distributed processing. The purpose of the pre-trial is to exercise and verify data sharing and processing capabilities, specifically to identify any critical problems well in advance of the main trial. This status report describes the status of the pre-trials in early September 2010.