Improvement of UAV Positioning Performance Based on EGNOS+SDCM Solution

The article presents the results of research on multi-SBAS (multi-satellite-based augmentation system) positioning in UAV (unmanned aerial vehicle) technology. For this purpose, a new solution was developed for combining position navigation from several SBAS systems. In particular case, presented linear combination algorithm is based fusion EGNOS (European geostationary overlay service) and SDCM (system differential correction monitoring) to determine resultant coordinates. mathematical model uses weights measurements three ways, i.e., Variant I, reciprocal number tracked satellites single solution; II, inverse square mean coordinate errors III, flight speed solution. experiment used real GNSS (global satellite data recorded by VTOL unmanned platform. test made April 2020 Poland, near Warsaw. Based results, it found that highest accuracy obtained when using weighting II. weight increased 1–2% horizontal components 19–22% vertical component h, concerning weighing Variants I III. It worth noting proposed significantly improves determining ellipsoidal height h. Compared arithmetic model, h II improved about 23%. paper also shows advantage EGNOS+SDCM over alone show significant advantages