The study of dual frequency ionospheric error correction method and accuracy analysis based on GPS

The ionospheric error is an important error source for GPS user. In order to eliminate this error, using a good method for correcting ionospheric error is necessary. In this paper, the author analyzed the virtue and flaw of these correction methods, used a method of dual-frequency pseudo range and carrier phase measurement to eliminate the ionospheric error of observation path, estimated the accuracy of dual-frequency correction methods and applicable scope, and verified the dual-frequency ionospheric error correction methods is feasible and effective.