IPW

[bconnelly at smtpgate.ssmc.noaa.gov]

          IPW stands for Image Processing Workbench.  It is a software
          package that allows you to calculate incoming solar
          radiation over the landscape based on a DEM, the time of
          day, and the date.

          Brian Connelly
          National Weather Service

          P.S.  The software has many other capabilities but I am most
          familiar with the solar radiation component.