报告内容摘要
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With the rapid
advance of large ring laser gyroscopes, their promising applications in
geoscience (such as, detection of Earth’s tides, Earth’s free oscillations
and seismical waves etc.) have been demonstrated impressively by several ring
laser groups. In this report I will present one more application, which is
the determination of the Earth’s dynamical ellipticity
by measuring the retrograde diurnal polar motion at the K1 wave
with a single large ring laser. The Earth’s astronomical dynamical
ellipticity Hd = 0.00323(6) is estimated by means of 168 days of
continuous data from the G-ring, located in Wettzell, Germany, which is the
most stable one amongst the currently running large ring laser gyroscopes.
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