How Do I Determine Sun Angles Throughout the Year For My Location?
How Do I Determine Sun Angles Throughout the Year For My Location?
The University of Oregon provides a free online tool that does just this. Plug in your location and this tool will provide a PDF with precise sun data. With this information you can determine the appropriate distances to place your arrays so as not to shade them during certain parts of year or day increasing the efficiency of your system. Check it out at http://solardat.uoregon.edu/SunChartProgram.html.
Sample Sun Path Diagram