Enumeration of the different tracker vector coordinate systems.
| Member | Value | Description |
|---|---|---|
| eCBI | 0 | The vector is in central body inertial (CBI) coordinates. For the Earth this is ICRF. |
| eCBF | 1 | The vector is in central body fixed (CBF) coordinates. For the Earth this is WGS-84. |
| eEFG | 9 | The vector is in pseudo Earth fixed coordinates (pole wander ignored). |





