A Real-Time wide Area Differential GPS System

摘要

This paper describes the system architecture, algorithms, and results form an operating Wide Area Differential GPS (WADGPS) system spanning the Continental United States (CONUS). With single- Frequency GPS user equipment and improved positioning Algorithms, real-time root mean square (RMS) user Position accuracy is typically better than 25 cm in the Horizontal components and 50 cm in the vertical with Current levels of ionospheric activity. Dual-frequency Users have a slightly degraded accuracy of 35 cm Horizontal and 75 cm vertical. There may be some Degradation in single-frequency positioning during solar Maximum or ionopsheric storms.