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Table 1.
Phase speeds of the PIDs in different EUV channels obtained from cross-correlation analysis.
| AIA EUV channel | Time lag | Phase speed from cross-correlation analysis | Phase speed from time-distance ridges |
|---|---|---|---|
| Å | sec. | km s−1 | km s−1 |
| 171 | 24.3 | 54.44 | 50.0 |
| 131 | 24.4 | 54.22 | 50.0 |
| 193 | 24.4 | 54.22 | 57.7 |
| 211 | 35.55 | 37.21 | 49.0 |
Notes. Phase speeds obtained using the ridges of time-distance measurements are also presented for better comparison.
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