Study of Detecting the Inner Core Super Rotation Using SG Data

The inner core super rotation(ICSR) rate is 0.27°~0.53°/a,which gives rise to the annual average variation intensity about 0.08~0.16 μGal.Besides seismic data,temporary gravity data might become an important information source for detecting(ICSR).The influences caused by the tide,air pressure,polar motion and variation of the length of day,are drawn out from the gravity data recorded by the superconducting gravimeter(SG) at Jiufeng Station,Wuhan;and corrected temporary gravity signals are obtained.These temporary gravity signals are further analyzed by wavelet approach;and some valuble results are drawn out.Concerning the difficulties existed in detecting ICSR using SG data,some comments and proposals are provided.