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• W2964190911 abstract "Multivariate space–time data are increasingly available in various scientific disciplines. When analyzing these data, one of the key issues is to describe the multivariate space–time dependences. Under the Gaussian framework, one needs to propose relevant models for multivariate space–time covariance functions, i.e. matrix-valued mappings with the additional requirement of non-negative definiteness. We propose a flexible parametric class of cross-covariance functions for multivariate space–time Gaussian random fields. Space–time components belong to the (univariate) Gneiting class of space–time covariance functions, with Matérn or Cauchy covariance functions in the spatial margins. The smoothness and scale parameters can be different for each variable. We provide sufficient conditions for positive definiteness. A simulation study shows that the parameters of this model can be efficiently estimated using weighted pairwise likelihood, which belongs to the class of composite likelihood methods. We then illustrate the model on a French dataset of weather variables." @default.
• W2964190911 created "2019-07-30" @default.
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• W2964190911 date "2016-11-01" @default.
• W2964190911 modified "2023-10-01" @default.
• W2964190911 title "A flexible class of non-separable cross-covariance functions for multivariate space–time data" @default.
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• W2964190911 doi "https://doi.org/10.1016/j.spasta.2016.02.004" @default.
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