1. Accurate determination of ionospheric effects on satellite based positioning systems in terms of residual range error;Ajayi;Radio Science,1980
2. Higher-order ionospheric effects on the global positioning systems observables and means of modeling them;Bassiri;Manuscripta Geodetica,1993
3. An improved model for dual frequency ionospheric correction of GPS observations;Brunner;Manuscripta Geodetica,1991
4. Evaluation of ionospheric residual range error model;Clynch;Proc. of the 3rd Intl. Geodetic Symp. on satellite Doppler positioning,1982
5. Ionospheric radio;Davies;IEEE Electromagnetic Waves Series,1990