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Table 2.
Parameters used for the dithering signals.
| Dithering sequence configuration | ||
|---|---|---|
| Number of modes | K | 3 |
| Duration | T | 500 ms – 250 frames |
| Signal shape | Aicos (2πfit) | |
| ψi gain reduction | 8.0 | |
| Modes | ψi | Fig. 7 |
| Frequencies | fi | 20, 30 and 40 Hz |
| Amplitude | Ai | auto. S/N assessment |
| Min. amplitude | 1.5 nm RMS per mode | |
| Max. amplitude | 25.0 nm RMS per mode | |
| Noise meas. band | Δf | ±2 DFT bins i.e., ±4 Hz |
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