Various errors and correction methods affecting the positioning accuracy of satellite navigation

This paper will briefly introduce the main methods to reduce or eliminate various errors at present. The body of is and discuss correction satellite ephemeris error clock difference, ionospheric delay, multipath effect, antenna phase center eccentricity correction, relativistic tide tropospheric path delay which affect accuracy navigation positioning. In addition non-dispertic medium, degree change medium with time relatively drastic, it difficult use a simple unified mathematical model determine, especially in long relative positioning baseline, between two stations often shows weak spatial correlation. Therefore, great significance establish real-time certain region improve navigation.