Correlation method estimation of the modulation signal in the weak equivalence principle test Project supported by the National Natural Science Foundation of China (Grant Nos. 11575160, 91636221, and 11605065). |
The power spectral density of the simulation signal of angular deflection, θ(t), of the pendulum. The peak f is the free torsional oscillation θd(t). The peak f1 is the modulation signal. |