Physics
Scientific paper
Sep 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jgr....84.5443g&link_type=abstract
Journal of Geophysical Research, vol. 84, Sept. 10, 1979, p. 5443-5445.
Physics
Binary Stars, Latitude Measurement, Polar Wandering (Geology), Diurnal Variations, Earth Tides, High Frequencies, Least Squares Method, Power Spectra
Scientific paper
Star pair latitude observations form the basis for the pole positions reported by the International Polar Motion Service (IMPS). The IPMS processes these observations to produce a mean pole position. However, the time series of observations contains high-frequency information which is lost in the calculation of the mean pole. In this study, 2931 star pair observations are analyzed. A possible large excitation at one cycle per solar day is observed. The average power level in the frequency band of the tesseral tides is seen to be high, although the peaks cannot be conclusively identified as tidal phenomena.
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