Details on ESRI's solar radiation tools
/A nice case study of detailed solar radiation modeling/mapping for Yellowstone National Park. All using existing ESRI spatial analyst tools.
Scientists at the National Aeronautics and Space Administration (NASA) Ames Research Center, including our buddy Chris Potter, the Yellowstone Ecological Research Center (YERC), the Creekside Center for Earth Observation (CCEO), and Esri have created 30-meter solar and temperature distribution maps in mountainous Yellowstone National Forest using tools in the ArcGIS Spatial Analyst extension. These products support ecological management in Yellowstone.
An overview of ESRI's Solar Radiation Tools can be found here. Go forth and insolate.