YuhangZhao - 12:50, Tuesday 20 October 2020 (2243)
Calibration of AA spectrum (Input/End pitch/yaw) with oplev
To compare oplev and AA spectrum, the first step is to calibrate both of them. The calibration is done as follows:
1. Calibrate oplev signal. The oplev signal calibration method was developed by Eleonora and written in elog1874.
2. Clibrate AA signal. The 4Hz sine wave was sent to Input/End pitch/yaw. By adjusting calibration factor of AA signal, AA's 4Hz peak was matched to oplev's peak. Then the calibration of AA signal was decided. The comparison is shown in the attached four figures.
| oplev | AA | |
| input pitch | 0.038 | 0.018 |
| input yaw | 0.027 | 0.013 |
| end pitch | 0.026 | 0.017 |
| end yaw | 0.018 | 0.013 |
unit: urad/counts
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