Solar irradiance and other solar data

For each location, provide the longitude and latitude, Watts per M^2 per time of day per month along the min and max solar arcs, and solar irradiation level. This is an example of what I have in mind: http://www.solarelectricityhandbook.com/solar-irradiance.html The time-of-day/seasonal data (or a table of data) could be displayed by mousing-over the associated point on the displayed trajectory.

Additional unconsolidated data is available via various sources. This NOAA site is but one example: http://www.esrl.noaa.gov/gmd/grad/about/rad.html (see the data section).

You've developed an excellent interface to easily access various types of solar data. If you can add more location-specific data, it will become a very useful tool for engineering solar systems.

Thank you for your work so far :-)