A. Oldak, T. Jackson and Y. Pachepsky, “Using GIS in Passive Microwave Soil Mapping and Geostatistical Analysis,” International Journal of Geographical Infor-mation Science, Vol. 16, No. 7, 2002, pp. 681-689.
 M. Durand and S. Margulis, “Effects of Uncertainty Mag-nitude and Accuracy on Assimilation of Multi-Scale Mea- surements for Snowpack Characterization,” Journal of Ge- ophysical Research, Vol. 113, No. 16, 2008, p. 17.
 M. Zupanski, D. Zupanski, D. F. Parrish, E. Rogers and G. DiMego, “Four-Dimensional Variation Data Assimilation for the Blizzard of 2000,” Monthly Weather Review, Vol. 130, No. 8, 2002, pp. 1967-1988.
 T. Vukicevic, M. Sengupta, A. S. Jones and T. Vond-er-Haar, “Cloud-Resolving Satellite Data Assimilation: Information Content of IR Window Observations and Un-certainties in Estimation,” Journal of the Atmospheric Sciences, Vol. 63, No. 3, 2006, pp. 901-919.
 W. T. Crow, “Correcting Land Surface Model Predictions for the Impact of Temporally Sparse Rainfall Rate Mea-surements Using an Ensemble Kalman Filter and Surface Brightness Temperature Observations,” Journal of Hydro- meteorology, Vol. 4, No. 5, 2003, pp. 960-973.
 M. Zupanski, S. J. Fletcher, I. M. Navon, B. Uzunoglu, R. P. Heikes, D. A. Randall, T. D. Ringler and D. N. Daescu, “Initiation of Ensemble Data Assimilation,” Tellus A, Vol. 58, No. 2, 2006, pp. 159-170.
 F. Anctil, R. Mathieu, L.-E. Parent, A. A. Viau, M. Sbih, and M. Hessami, “Geostatistics of Near-Surface Moisture in Bare Cultivated Organic Soils,” Journal of Hydrology, Vol. 260, No. 1, 2002, pp. 30-37.
 M. Herbst and B. Diekkruger, “Modelling the Spatial Va-riability of Soil Moisture in a Micro-Scale Catchment and Comparison with Field Data Using Geostatistics,” Physics and Chemistry of the Earth, Parts A/B/C, Vol. 28, No. 6, 2003, pp. 239-245.
 J. Wang, B. Fu, Y. Qiu, L. Chen and Z. Wang, “Geostatis-tical Analysis of Soil Moisture Variability on Da Nangou Catchment of the Loess Plateau, China,” Environmental Geology, Vol. 41, No. 1-2, 2001, pp. 113-120.
 A. W. Western, R. B. Grayson and T. R. Green, “The Tar-rawarra Project: High Resolution Spatial Measurement, Modelling and Analysis of Hydrological Response,” Hy-drological Processes, Vol. 13, No. 5, 1999, pp. 633-652.
 O. R. Dani and R. J. Hanks, “Spatial and Temporal Soil Moisture Estimation Considering Soil Variability and Evapotranspiration on Uncertainty,” Water Resources Re-search, Vol. 28, No. 3, 1992, pp. 803-814.
 B. P. Mohanty, T. H. Skaggs and J. S. Famiglietti, “Anal-ysis and Mapping of Field Scale Soil Moisture Variability Using High Resolution Ground Based Data during the Southern Great Plains,” Water Resources Research, Vol. 36, No. 4, 2000, pp. 1023-1031.
 J. A. Huisman, C. Sperl, W. Bouten and J. M. Verstraten, “Soil Water Content Measurent at Different Scales: Accu-racy of Time Domain Reflectometery and Ground Pene-trating Radar,” Journal of Hydrology, Vol. 245, No. 1, 2001, pp. 48-58.
 A. U. Bhatti, D. J. Mulla and B. E. Frazier, “Estimation of Soil Properties and Wheat Yields on Complex Eroded Hills Using Geostatistics and Thematic Mapper Images,” Remote Sensing of Environment, Vol. 37, No. 3, 1991, pp. 181-191.