Abstract
Modeling of spatio-temporal processes is critical in many fields such as environmental sciences, meteorology, hydrology and reservoir engineering. The variogram is an important correlation measure in geostatistics and a useful tool for spatial or spatio-temporal modeling. Although many space-time covariance/variogram models are available, in practice,the generalized product-sum model is most widely used. The theoretical aspects of the generalized product-sum variogram model have been presented in other papers. However, the dissemination of software that brings the generalized product-sum variogram model to a wider group of users is undoubtedly desirable. In this paper, we describe an R routine for “spatio-temporal kriging” with hole effects, and appropriate space-time search neighborhoods. An application to ozone pollutants in an area of five counties of the US is presented. The experimental results show that the spatio-temporal random field provides more information than the purely spatial random field, because the accuracy of interpolation has been improved.
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Acknowledgments
Jointly supported by the State Key Program of National Natural Science of China (No. 41331175), the National Natural Science Foundation of China (No. 41171313), the Hubei Provincial Natural Science Foundation of China (No. 2014CFB725/ZRY2014000982), and the Suzhou Science and Technology Program of Applied Basic Research (No. SYG201319).
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Communicated by: H. A. Babaie
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Xu, J., Shu, H. Spatio-temporal kriging based on the product-sum model: some computational aspects. Earth Sci Inform 8, 639–648 (2015). https://doi.org/10.1007/s12145-014-0195-x
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DOI: https://doi.org/10.1007/s12145-014-0195-x