Brzeziński A. and M. Rajner. “Estimation of the Chandler wobble parameters by the use of the Kalman deconvolution filter.” Journées 2013 Systèmes de Référence Spatio-Temporels (Scientific developments from highly accurate space-time reference systems). Paris, France.
  • [bib]
    @conference{Brzezinski2013_journee,
    date  =  {2013-09-17},
    month  =  {sep},
    year  =  {2013},
    author  =  {Brzeziński, Aleksander and Rajner, Marcin},
    title  =  {Estimation of the Chandler wobble parameters by the use of the Kalman deconvolution filter},
    eventtitle  =  {Journées 2013 Systèmes de Référence Spatio-Temporels},
    eventdate  =  {2013-09-16/2013-09-18},
    address  =  {Paris, France},
    presenter  =  {Aleksander Brzeziński},
    eventtitleaddon  =  {Scientific developments from highly accurate space-time reference systems},
    }
  • [abstract]
    The parameters of the Chandler wobble (cw), the frequency F (or, equivalently, the period T = 1/F) and the quality factor Q, are important for studying global dynamics of the Earth because they define the equation describing geophysical excitation of polar motion and are closely related to various geophysical parameters. Our purpose here is to estimate of the cw parameters based on the stochastic models of polar motion and geophysical excitation data. We apply the Kalman deconvolution filter developed by Brzezinski (1992, manuscripta geodaetica 17: 3-20). This filter can be used to analyze either the polar motion data alone, or simultaneously the polar motion and the excitation data, in order to estimate the unknown residual excitation. By imposing the minimum variance constraint upon the estimated excitation we can find the best value of the resonant parameters F and Q. We will show here some results based on different available sets of polar motion and geophysical excitation data. The estimated cw parameters will be compared to each other as well as to the results based on the alternative algorithms.
  • [url]
    http://syrte.obspm.fr/journees2013/