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Related parameters of SDE and MC of BT in France from 2015 to 2018.
| Year | Shape area | CenterX | CenterY | Long axis | Shot axis | Oblateness* | Rotation angle (°) |
|---|---|---|---|---|---|---|---|
| 2015 | 2.06 | 3.088145 | 46.028533 | 0.86 | 0.76 | 0.12 | 100.1 |
| 2016 | 4.91 | 3.897606 | 45.879424 | 1.67 | 0.93 | 0.44 | 75.41 |
| 2017 | 16.18 | 5.030139 | 45.852749 | 2.97 | 1.73 | 0.42 | 121.66 |
| 2018 | 0.11 | 6.405672 | 46.256046 | 0.34 | 0.1 | 0.71 | 61.9 |
Oblateness* = (Long axis − Short axis)/Long axis.
