3D Visualization of Numerically Calculated Bearing Error Texture in Disturbed DVOR Scenarios

Radio navigation aids like the Doppler Very High Frequency Omnidirectional Radio Ranges (DVOR) are sensitive to scattering objects like buildings and wind turbines. Due to multipath and shadowing effects the propagation of the corresponding "signal in space" is disturbed and deviations of the transmitted navigation content are expected. Existing analytical and numerical methods to determine the induced bearing error in space are often aimed at estimating just one value for the expected maximum error in a specified space volume or at most provide 2-dimensional observation surfaces, on which the error is represented by color mapping. However, in order to understand the propagation of bearing error in space, a 3-dimensional investigation is essential but often not realizable due to very high computational effort. In this paper a method is presented to calculate the 3-dimensional texture of the bearing error while constraining computational effort to a reasonable amount.