5 PROPOSED CORRECTION FACTOR This work has shown that the breakdown voltage is affected by humidity for short gaps but not the long gaps. Physical dimensions of this magnitude, 10-50 mm, are of practical interest for VLF/LF applications. Comparable distances are used in antenna systems, such as between internal parts of bushings and on guy wire insulators for supporting the antenna [2]. Based on the short gap experiments conducted, a correction factor has been developed for the calculation of the breakdown voltage at 30 kHz for different values of humidity as a function of the breakdown voltage determined at a humidity of 10% RH. To obtain the humidity correction factor, a linear regression model was developed using a least-squares technique [13]. The model used all the measurements described in this paper. The slope and intercept for the fitted line is obtained. The slope characterizes the change in breakdown voltage per unit of RH. The slope is normalized to the value of the breakdown voltage at 10% RH for 30 kHz. For the regression, the level of significance used was 0.05 and the p-value obtained was less than 1×10-4. In Table 2 below, the second column presents the slope obtained from the linear regression, while the third column provides the 95% confidence interval of this value. The confidence interval specifies the range, with 95% certainty, where the mean of new measurements will lie. The correction factor plot is shown in Figure 13. The dependency of the breakdown voltage on humidity is based on the presence of glow discharges prior to breakdown. As such, it is expected that this correction factor would be