Analysis of Ionospheric Irregularity Observed near Suvarnabhumi International Airport in Thailand

摘要

The ionospheric irregularity poses a major effect on the radio signals. It is well known that the irregular electrons density can degrade the performance of the Ground-Based Augmentation System (GBAS). This work proposes the methods to calculate three parameters in the ionospheric threat model: front speed, front slope and front width. The data of PRN9 satellite at three reference stations near Suvarnabhumi international airport, Thailand: KMITL, STFD and DPT stations, on 25th September 2012 are analyzed. The results show that the front speed is about 142.86 meters/second, the maximum front slope is -30 mm/km and the front width is higher than 25 kilometers.