Analysis of a HAPS-Aided GNSS in Urban Areas Using a RAIM Algorithm

The global averaged civilian positioning accuracy is still at meter level for all existing Global Navigation Satellite Systems (GNSSs), and the performance even worse in urban areas. At lower altitudes than satellites, high altitude platform stations (HAPS) offer several benefits, such as latency, less pathloss, likely smaller overall estimation error parameters associated pseudorange equation. HAPS can support GNSSs many ways, this paper we treat another type of ranging source. In so doing, examine a HAPS-aided GPS system an area using both simulation physical experiment. measurements are unavailable today; therefore, they modeled rather simple but logical manner We show that improve horizontal dilution precision (HDOP), vertical (VDOP), 3D suburban dense also demonstrate applicability RAIM algorithm system, especially area.