Research Article
Phase Error Modeling and Its Impact on Precise Orbit Determination of GRACE Satellites
Table 3
Parameters estimated in orbit determination.
| Estimated parameter | Description |
| Initial state vector | 3D position and velocity estimated per day | Atmospheric drag coefficient | Estimated per 3 hour | Solar radiation pressure coefficient | Estimated per 12 hours | Empirical acceleration coefficient | , , , , , estimated per orbital revolution | LEO clock offset | Estimated epoch-wise | Ambiguity | Estimated per arc of continuous tracking of a single GPS satellite |
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