3-D imaging method for ROSAR

To obtain the three dimensional information, which is essential for navigation in low altitude area for helicopters and other rotary wing aircrafts, a novel three-dimensional rotor synthetic aperture radar (3-D ROSAR) mode is developed. In this paper, 3-D ROSAR model is established by way of “step-hover” in the elevation direction. For this model, corresponding imaging method is also presented by the extended omega-K algorithm to focus the 3-D image. Simulation results validate the accuracy of the model and the effectiveness of the algorithm.