The report describes planning and preparations for a bistatic airborne radar experiment in 2009 within a bilateral research collaboration between FOI in Sweden and DGA/ONERA in France. Preliminary flight tests will be conducted in France during the fall 2009 and a larger data collection is planned to be conducted in Sweden during 2010. The objective is to demonstrate bistatic SAR in the VHF/UHF-band (222-460 MHz), in particular to investigate target-to-clutter-ratio for targets concealed in forest and urban environment as a function of bistatic geometry. Computations and simulations have shown that the target-to-clutter-ratio can increase significantly in bistatic SAR compared to monostatic geometry. The phenomena occurs since the reflection between horizontal ground and a vertical tree stem or building wall, which often dominates in monostatic SAR, decreases as the bistatic elevation angle increases, whereas the target cross section is relatively unchanged. An earlier experiment, performed during 2007 in the low VHF band (28-73 MHz) with a ground based and airborne radar, has shown that the phenomena exist for suitable geometries. The following airborne radar systems will participate in the preliminary flight tests during 2009: ? LORA, developed by FOI and installed on FMV's test aircraft Sabreliner. ? SETHI, developed by ONERA and installed on a Falcon 20. A laboratory test was successfully conducted during the fall of 2008 whereby the two radar systems were operated together. Both systems are designed to function either as monostatic transmitter and receiver (active mod) or as bistatic receiver (passiv mode). System synchronization and frequency tuning is done based on the 1PPS-signal from a GPS-receiver in each system. The planned experiment area is close to the city of Mende which is located at a suitable distance from the airbase at Nîmes in southern France.