Experiments with EKF-LDAS :
		With EKF-LDAS, numerical experiments are conducted for answering the following questions: §   How is EKF data assimilation superior to direct insertion of observation data? §   How do the model and observation error covariances affect EKF data assimilation? §   How does EKF correct model errors caused by model initialization or forcing? §   How can EKF data assimilation help data validation?
		Experiment Settings: §   Initial soil moisture:           0.3 fc or  0.7fc §   SWDN:                     100% or 120% §   DA method:             none or EKF or DI §   Mdl error variance:           0.01 or 0.001fc §   Obs error variance:          0.05 or 0.005 or 0.5fc §   Land surface model:        Mosaic model §   Forcing data:             NASA forcing §   Model time:                      from 00z07July1999                                                  to 23z20July1999
				Soil Moisture Observation Data: § MOS: Synthetic top layer soil moisture from Mosaic model with correct initiali- zation and forcing for the SGP99 area (12x21 1/8° grids) for noon time daily. § TMI: Surface soil moisture derived by Jackson et al from TMI 10.7GHz brightness temperature for the SGP99 area and downloaded from Goddard DAAC.