Table 2
Predicted inversion errors and the expected magnitude of the velocities at the three different depths discussed throughout this paper.
| Depth [Mm] | 1 | 3.5 | 5.5 |
|
|
|||
| FWHM sh [Mm] | 15 | 15 | 15 |
| FWHM sz [Mm] | 1.1 | 2.2 | 3.5 |
|
|
|||
| T = 4 days | |||
| Noise σx [m s-1] | 14 | 20 | 28 |
Inverted signal  [m s-1] |
35 | 20 | 13 |
Targeted signal  [m s-1] |
40 | 25 | 20 |
| Noise σz [m s-1] | 3 | 13 | 133 |
Inverted signal  [m s-1] |
5 | 5 | 5 |
Targeted signal  [m s-1] |
5 | 7 | 7 |
|
|
|||
| 104 × T = 6 h | |||
| Noise σx [m s-1] | 7 | 9 | 7 |
| Inverted signal [m s-1] |
41 | 25 | 19 |
| Targeted signal [m s-1] |
40 | 25 | 20 |
| Noise σz [m s-1] | 2 | 2 | 1 |
| Inverted signal [m s-1] |
5 | 6 | 4 |
| Targeted signal [m s-1] |
5 | 7 | 7 |
Notes. Presented results are for inversions with cross-talk minimised and for two discussed cases: (1) inversion using travel-time maps averaged over few days and (2) averaging over many realisations of similar flow structure, each averaged over a short time (here we assume 104 realisations, each averaged over 6 h).
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