Two different methods were developed for estimation and correction of biases between measurement networks. A description of the method can be found in the following papers and reports:
Deliverable 4.2 R codes for heterogeneous monitoring networks
Baume, O. P., J. O. Skøien, G. B. M. Heuvelink, and E. J. Pebesma (2008) Data harmonization with geostatistical tools: a Bayesian extension, paper presented at Geostats, Gecamin Ltd, Santiago, Chile.
Skøien, J. O., O. P. Baume, E. J. Pebesma, and G. B. M. Heuvelink (2009) Identifying and removing heterogeneities between monitoring networks, Environmetrics, Accepted.