A Tidal Correction Method from a Short-time Series of Gravity Observations

Areas without standing and continuous tidal data or a precise tidal model require a precise tidal correction method. High-accuracy tidal correction methods using short-time series of gravity observations are proposed to address this problem.The superconducting gravity observations of TIGO Concepcion，Kamioka，and Hsinchu stations in Global Geodynamics Project were used in experimental analysis.The results show that:a high-accuracy tidal model can be established by gravity observations over one or several days;the accuracies of factor amplitude and phase delay are better than 0.O1 and 0.5 degrees;the accuracy of tidal correction can reach micro gal level，demonstrating the effectiveness of the method.This new approach is suitable for areas without precise tidal models.