Precipitation: Remote-Sensing: SSM/I, TRMM, AMSR, GOES,
AVHRR
In-Situ: Surface Gages and Doppler Radar
Radiation: Remote-Sensing: MODIS, GOES, AVHRR
In-Situ: DOE-ARM, Mesonets, USDA-ARS
Surface
Temperature: Remote-Sensing: AVHRR, MODIS, SSM/I, GOES
In-Situ: DOE-ARM, Mesonets, NWS-ASOS, USDA-ARS
Soil
Moisture: Remote-Sensing: TRMM, SSM/I, AMSR, HydroStar, ESTAR, NOHRSC, SMOS
In-Situ: DOE-ARM, Mesonets, Global Soil Moisture Data Bank, USDA-ARS
Groundwater: Remote-Sensing: GRACE
In-Situ: Well Observations
Snow
Cover, Depth & Water: Remote-Sensing: AVHRR, MODIS, SSM/I, AMSR, GOES, NWCC, NOHRSC
In-Situ: SNOTEL
Streamflow: Remote-Sensing: Laser/Radar Altimiter
In-Situ: Real-Time USGS, USDA-ARS
Vegetation: Remote-Sensing: AVHRR, TM, VCL, MODIS,
GOES
In-Situ: Field Experiments
Others: Soils, Latent & Sensible heat fluxes, etc.