Kriging of spatial-temporal water vapor data

Roderik Lindenbergh, Maxim Keshin, Hans van der Marel and Ramon Hanssen
Delft Institute of Earth Observation and Space Systems,
Delft University of Technology, 
P.O.Box 5058, 2600 GB,
Delft, The Netherlands,
Tel.: +31 15 27 87 649; Fax: +31 15 27 83 711,,,

Water vapor is the dominant greenhouse gas but  is varying strongly both in the spatial and temporal domain. A high spatial resolution of down to 300m is available in MERIS water vapor data but the temporal resolution is only three days. On the other hand water vapor observations from GPS ground stations have temporal resolutions in the order of 1 hour, but nearby stations are mostly tenths of kilometers away. A collocated cokriging approach, incorporating the results of a structural spatial and temporal analysis of the different water vapor signals, is used to combine both observation sources in order to obtain a combined water vapor product of high spatial and temporal resolution.

Keywords: spatial-temporal, cokriging, water vapor, accuracy

In: Caetano, M. and Painho, M. (eds). Proceedings of the 7th International Symposium on Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, 5 – 7 July 2006, Lisboa, Instituto Geográfico Português

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