On Enhanced PPP with Single Difference Between-Satellite Ionospheric Constraints

Abstract Applications of precise point positioning (PPP) are limited by PPP’s long convergence time. One effective way to shorten the time is apply ionospheric constraints because external information. The conventional do this high precision but biased corrections. limitations method that all must be derived from same set reference stations have data. An approach based on single differences between satellite (SDBS-IONO) developed address data issue due having no common visibility. proposed more flexible and scalable in terms adding constraints. Based a network about 130 stations, we validated SDBS-ION compared it method. Our results confirm enhance PPP significantly depending accuracy Finally, discuss crucial factors regarding how accurate effectiveness reducing