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The Improvement in the Terrain Model for a Target Close to an Obstacle

For the precise determination of the position of a target close to an obstacle, the effects of polarization, frequency, transmitter height, obstacle height, obstacle base width, transmitter-obstacle distance, and obstacle-target distance are important. An obstacle between the transmitter and the target is modeled as an impedance wedge and as an impedance ellipse. The chosen models are compared to each other, and it is shown that the results are considerably different. The differences between the results allow one to choose the more suitable obstacle model and discrimination parameters for the correct target detection in a particular application.