Comparative Analysis of the H2PT Ionosphere Model

The ionosphere stands in the path of signals emitted by Global Navigation Satellite System (GNSS) satellites to receivers located on Earth’s surface. Many factors affect accuracy satellite positioning, but error due ionospheric refraction is largest among them. For this reason, it important minimize impact refraction, and models are one methods used. As intensity processes taking place variable because solar activity, influence observations also not constant; varies location time day year. Therefore, focusing region interest users especially useful precise GNSS applications. In research, H2PT model covering Europe was examined at a temporal resolution 15 min two spatial resolutions (latitude × longitude) 1° 5° 5°. This study aimed compare with solution obtained from International Service (IGS) context vertical total electron content (VTEC). values high-latitude regions turned out be overestimated compared IGS VTEC maps, while, low-latitude regions, situation opposite. Although differences between analyzed maps were usually few TECUs, observed that, during course day, they could increase several dozen TECUs. Furthermore, data selected days characterized high or low activity subjected detailed analysis (in relation quiet days, as well median). available 15-min interval allowed identification short-term disturbances appearing ionosphere. model, which regional nature has relatively resolution, allows improvement made quality determined correction positioning.