Table 1.
The parameters of the space-time path on the two-dimensional plane.
| * Parameters | Jan. 22–Jan. 26 | Jan. 26–Jan. 29 | Jan. 29–Feb. 02 | Feb. 02–Feb. 05 | Feb. 05–Feb. 09 | Feb. 09–Feb. 12 | Feb. 12–Feb. 16 | Feb. 16–Feb. 19 |
|---|---|---|---|---|---|---|---|---|
| θ (°) | 5.133 | 35.833 | 32.133 | 34.541 | 1.630 | 14.742 | 21.819 | 11.838 |
| Direction | east | north by east | south by west | north by east | south by east | south by east | north by east | east |
| Speed(km/days) | 10.000 | 101.98 | 88.776 | 88.003 | 3.536 | 35.901 | 52.738 | 23.333 |
* Notes: The space-time path has two very important attributes: the velocity and angle (θ) between two control points. velocity is composed of speed and direction. So, we can use θ, velocity and direction to describe the space-time path.