Changes

I calculated the theoretical GPS error for each point using the agi.com C# library. I followed their cookbook for [http://www.agi.com/resources/help/online/AGIComponents/Programmer%27s Guide%20Guide/Overview/Navigation Accuracy%20Accuracy/AccuracyAnalysisSetup.html GPS Accuracy Analysis], which consists of:# * Create a constellation of satellites using AGI's SEM formatted almanac.# * Modify the constellation based on AGI's outage data.# * Configure a GPS receiver model. ## ** Set Elevation Angle Constraint to between 5 and 40 degrees.## ** Set the latitude/longitude to that recorded by the point.## ** I set the receiver to have 12 channels, which is the norm for a GPS watch. # * Evaluate the recorded GPS accuracy, Dilution of Precision and the number of satellites in view.