Modeling and assessment of atmospheric delay for GPS/Galileo/BDS PPP-RTK in regional-scale
MetadataShow full item record
Combining advantages of precise point positioning (PPP) and real-time kinematic (RTK), PPP-RTK has become a promising technology in the mass-market positioning. When performing PPP-RTK, atmospheric corrections enable the user fast ambiguity resolution as well as centimeter accuracy. However, the legacy method of obtaining atmospheric corrections, i.e., interpolating the atmospheric delay based on nearby reference stations, is not regular in space and needs the reference station coordinate information, thereby limiting real-time professional applications. In this contribution, a low-degree polynomial with regular grid residuals is investigated. Forming between-satellite single-differenced slant ionospheric delay, we theoretically analyze the reference network size. Afterwards, the zenith tropospheric delay and slant ionospheric delay accuracy using zero-, first- and second-degree polynomials in calm atmospheric periods are about (5.6, 4.7 and 4.7) mm and (1.9, 1.3 and 1.3) cm. It is therefore recommended to adopt the first-degree polynomial model in terms of the accuracy and transmission load.
Showing items related by title, author, creator and subject.
A method for processing GNSS data from regional reference networks to enable single-frequency PPP-RTKZhang, B.; Odijk, Dennis (2015)Global Navigation Satellite System (GNSS) data from reference station networks deployed globally can facilitate positioning, navigation and timing applications. To enable precise positioning for dual-frequency users, ...
El-Mowafy, Ahmed ; Wang, Kan; El-Sayed, Hassan (2022)Integrity monitoring (IM) is a vital task for precise real-time positioning in road transportation, autonomous driving, and drones, where safety is essential. IM has the main tasks of detection and exclusion of faulty ...
Odijk, Dennis; Teunissen, Peter; Zhang, B. (2012)High-precision (centimeter-level) real-time kinematic precise point positioning (PPP-RTK) becomes feasible when using precise corrections, as received from a regional Continuously Operating Reference Station network. These ...