Centre of Box Information
- Anik F1
- Anik F1R
- Anik F2
- Anik F3
- Nimiq N1
- Nimiq N2
- Nimiq N4
- Nimiq N5
- Telstar 11N
- Telstar 12
- Telstar 14R
- Telstar 18
Centre of Box predicts are used to point ground antennas at the satellites in orbit. Because the satellite's orbit is never perfect, the latitude and longitude vary with time. Cbox predicts allow antenna pointing to be corrected for this variation.
The plot below shows the path of the satellite over a one-week period. Each day, there are two points where the satellite comes closest to the centre of the stationkeeping box. These points are marked with blue dots on the latitude/longitude path.
The Latitude Deviation in the table below is the deviation from zero latitude at the point of closest approach for the half-day. The Longitude Deviation is the deviation from the nominal stationkeeping longitude, and the Lat/Long Deviation is the combined latitude and longitude angular deviation.
| Time | UTC | Latitude | Longitude | Deviation | Deviation | Deviation |
| (Year/Mo/Da | Hr:Mn:Se:Ms) | (deg) | (deg W) | (deg) | (deg) | (deg) |
| 1998/10/06 | 06:07:26:417 | -.0105 | 107.2875 | -.0105 | -.0125 | .0163 |
| 1998/10/06 | 16:55:59:699 | .0027 | 107.3032 | .0027 | .0032 | .0041 |
| 1998/10/07 | 06:00:58:313 | -.0108 | 107.2882 | -.0108 | -.0108 | .0160 |
| 1998/10/07 | 16:59:16:931 | .0049 | 107.3064 | .0049 | .0049 | .0081 |
| 1998/10/08 | 05:54:24:877 | -.0119 | 107.2881 | -.0119 | -.0119 | .0168 |
| 1998/10/08 | 16:47:03:425 | .0063 | 107.3094 | .0063 | .0063 | .0113 |
| 1998/10/09 | 05:46:15:894 | -.0138 | 107.2871 | -.0138 | -.0138 | .0189 |
| 1998/10/09 | 16:13:21:571 | .0061 | 107.3121 | .0061 | .0061 | .0135 |
| 1998/10/10 | 05:33:26:000 | -.0159 | 107.2849 | -.0159 | -.0159 | .0219 |
| 1998/10/10 | 15:30:52:085 | .0049 | 107.3138 | .0049 | .0049 | .0147 |
| 1998/10/11 | 04:56:38:386 | -.0160 | 107.2805 | -.0160 | -.0160 | .0252 |
| 1998/10/11 | 14:55:56:914 | .0038 | 107.3147 | .0038 | .0038 | .0152 |
| 1998/10/12 | 03:14:35:056 | -.0075 | 107.2737 | -.0075 | -.0075 | .0273 |
| 1998/10/12 | 14:30:31:476 | .0028 | 107.3151 | .0028 | .0028 | .0153 |
Centre of Box predicts are computed daily at 04:00 GMT. Predicts are generated for a period from 5 days before the predict generation time to 5 days after, based on the current best orbit estimate. Because satellite maneuvers have a profound effect on Centre of Box predicts and are normally planned a day before execution, predicts more than a day after the predict execution time are subject to change.