Precise Orbit Determination of Global Navigation Satellite System of ...

Chapter 9 Software and Simulation Results
Figure 9-12 The Accuracy of Orbit Determination with Elevation Mask 15°
The accuracies of x, y, z coordinates of the dynamic orbit determination with the satellite visibility control
(elevation mask=5°) are ±0.59, ±0.63, ±0.66 meters respectively. For elevation mask=10°, the accuracies of
dynamic orbit determination are ±1.41, ±1.10, ±1.35 meters respectively. For elevation mask 15°, the accuracies
of dynamic orbit determination are ±0.92, ±1.19, ±1.32 meters respectively (see Figure 9-10, Figure 9-11 and
Figure 9-12). Obviously, due to the satellite visibility, the number of the tracking stations which take the
measurements of the satellite is decreased during some arcs of the satellite and the accuracy of the orbit
determination is reduced. The related PDOP of the orbit determination using these 8 ground tracking stations is
shown in Figure 9-13.
Figure 9-13 PDOP of the Orbit Determination with 8 Tracking Station Distribution (Elevation Mask 10°)
The results of orbit determination of an IGSO satellite located at λ=60°, -10° are drawn in Figure 9-14 to Figure
9-17 (elevation mask 10°).
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