Table 2.
Shape parameters of the ellipse for the standard deviation of ST incidence in Jiangsu Province (2006–2023)
| Year | Azimuth (°) | Short Axis (km) | Long Axis (km) | Aspect Ratio (Major/Minor) |
|---|---|---|---|---|
| 2006 | 33.31 | 93.33 | 160.00 | 1.71 |
| 2007 | 22.11 | 137.33 | 218.67 | 1.59 |
| 2008 | 4.34 | 174.67 | 305.33 | 1.75 |
| 2009 | 95.48 | 194.67 | 196.00 | 1.01 |
| 2010 | 25.75 | 144.00 | 208.00 | 1.44 |
| 2011 | 145.61 | 174.67 | 226.67 | 1.30 |
| 2012 | 170.43 | 149.33 | 281.33 | 1.88 |
| 2013 | 163.60 | 136.00 | 325.33 | 2.39 |
| 2014 | 150.27 | 162.67 | 318.67 | 1.96 |
| 2015 | 141.13 | 168.00 | 312.00 | 1.86 |
| 2016 | 137.32 | 170.67 | 333.33 | 1.95 |
| 2017 | 137.80 | 177.33 | 346.67 | 1.95 |
| 2018 | 144.00 | 182.67 | 326.67 | 1.79 |
| 2019 | 135.44 | 180.00 | 356.00 | 1.98 |
| 2020 | 137.99 | 169.33 | 358.67 | 2.12 |
| 2021 | 132.87 | 189.33 | 360.00 | 1.90 |
| 2022 | 131.81 | 180.00 | 372.00 | 2.07 |
| 2023 | 130.57 | 181.33 | 368.00 | 2.03 |