First a word about methodology. In the course of these studies the acquisition of data has sometimes been difficult, at best. When this inquiry began a decade ago I lived in Oregon. I was barely able to find accurate fundamental astronomic data in the State University libraries. Finding exactive geodetic coordinates for archaeological sites has been even more difficult.
Most archaeologists never make such determinations.
Some of the best archaeological site maps in the world lack any reference to latitude or longitude. Rarely does such data appear in archaeological publications. Only a few professional archaeologists have responded positively, if at all, to requests for assistance or data. Their paradigms tell us that this information is not relevant. I have had to rely almost entirely on available topographic maps.