In-flight measurements and RCS-predictions: a comparison on broad-side radar range profiles of a Boeing 737

The validation of radar cross section (RCS) prediction techniques against real measurements is crucial to acquire confidence in predictions when measurements are not available. We present the first results of a comparison on one dimensional images, i.e., radar range profiles. The profiles were measured of a target of opportunity, a Boeing 737, seen at broad-side aspect angles. At the same aspect angles and frequencies, profiles were predicted using the high-frequency RCS-prediction code RAPPORT in conjunction with a digitised model of the Boeing. Despite the assumptions and simplifications in both the prediction code and the aircraft model, an excellent agreement is observed.