To analyze the influence of electrified railway high-speed train arcs on the airport Very high frequency Omnidirectional Range (VOR), the electromagnetic emission characteristics of the arcs are studied. The electromagnetic interference receiver and the spectrum analyzer are used to measure the typical locations of electrified railways (neutral section points and common points) by means of point frequency and sweep frequency respectively. The heteroscedasticity of the test data is analyzed and the regression analysis method improved. The amplitude-frequency characteristic curve of the arcs in the omnidirectional beacon frequency band is fitted, with the influence of arc electromagnetic radiation on the omnidirectional beacon of the airport analyzed. The results show that: the electromagnetic radiation of the arc has a certain random characteristic; the maximum field strength is at the neutral section point, larger than that at the normal points; in modern electrified railways, the heteroscedasticity of the test data of the neutral section is more distinct, and the ordinary least squares estimation method is not applicable; when the electrified railway electrical phase separation point is within the distance of 4.944 km to the aircraft, it may affect the VOR signals.
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