Analysis of the Multi-Path Angle Error of the Microwave Landing System (MLS) Receiver Based on Replacement Technology of Main-Lobe Beaming

By analyzing the principle of the angle error of the MLS receiver, an error research method based on the equivalent replacement of the scanning beaming main lobe is presented. Through the equivalent Gaussian replacement of the beam main-lobe of "From" and "To" pulse, the error formula in the presence of several multi-path components is derived. The method is used to calculate the angle-measuring performance error of the receiver for the special multi-path environment. The results of replacement method computation are compared with the computed results of classical model. The new method can overcome the limitation and deficiency of classical model in the exact error calculation. Moreover, the accuracy is more improved than the classical model.