Orbit determination strategy using single frequency GPS data

This research presents orbit determination results estimated by various ionospheric error correction techniques for a LEO (Low Earth Orbit) satellite using a single frequency GPS receiver. A scale factor, dependent on altitude, was applied to the ionospheric shell model. The direct-calibration method, DRVID (Differential Range Versus Integrated Doppler), used range differences of group delay and phase advance to compensate for the first order ionospheric error. The fidelity of the orbit solutions was tested by orbit overlaps and differences from dual frequency truth orbits. Analyses showed that the DRVID carrier phase can determine the orbit accuracy below the meter level with a single frequency GPS receiver on the LEO satellite.