Time series: theory and methods
Time series: theory and methods
FORTRAN programs for space-time modeling
Computers & Geosciences
Towards an automatic procedure for modeling multivariate space-time data
Computers & Geosciences
Predicting spatio-temporal random fields: Some computational aspects
Computers & Geosciences
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Environmental data is nearly always multivariate and often spatial-temporal. Thus to interpolate the data in space or to predict in space-time it is necessary to use a multivariate spatial-temporal method. Cokriging is easily extended to spatial-temporal data if there are valid space-time variograms or covariance functions. Various authors have proposed such models. In this paper, a generalized product-sum model is used with a linear coregionalization model for cokriging. The GSLib ''COKB3D'' program was modified to incorporate the space-time linear coregionalization model (ST-LCM), using the generalized product-sum variogram model. Hence, a new GSLib software, named ''COK2ST'', is proposed. To demonstrate the use of the software, hourly measurements of carbon monoxide and nitrogen dioxide from the Puglia region in Italy are used.