Winter solstice 2012 - Sun's longitude

[FrankM]

There have been a couple of threads earlier that discussed issues related to the 2012 date but as far I can ascertain no one has covered the longititude issue.

No one has explained why zero longitude was in the Eastern Atlantic ocean just off the Western most prominence of the African continent on some of the ancient maps, like that of Piri Reis. I examined how the Mayan's identified the Summer and Winter solstice and it occurred to me that during both of these observation events they were observing the Sun just breaking the horizon and this would also mean that somewhere in the East, over the Atlantic, the Sun would be directly overhead. At what longitude would the Sun be directly overhead?

I assumed the Izapa, Mexico site had been "thoroughly" documented, which should allow one to be able to calculate the Sun's longitudinal position using elevation and azimuth "sighting" positions recorded by the archaeologists. To calculate the sun's longitudinal position, one would need the azimuth and elevation of the "sighting line" at the Izapa temple, and the elevation and geographic coordinates of the Izapa temple site and the Tacana volcano peak.

I have not been able to find the needed information.

Can anybody provide this information?

[HappytheStripper]

I figured along time ago.. with logical thought.. that which you speak of.. was related to magnetic pole reversals..

I don't know much about that which you speak of.. therefore I have no logical reasoning to back up my statement.. it is simply.. raw thought..

I do however know enough to reply to this thread and add my thought..

Ashley

[FrankM]

I thought I could develop the minimum data set from the following URL, but after making an inquiry to the author of the web site, I found the "map" did not accurately represent the "sighting" azimuth.

IZAPA/SITE

The ideal data set would be the "sighting" azimuth and elevation at the Izapa site along the elevation of the Izapa temple site. One can develop the approximate azimuth angle from topographical maps, but a critical item is the elevation angle. I have not been able to get an accurate elevation for the Izapa site, but that of the Tacana volcano is available.

I could calculate the sun's high noon location to the Eastern Atlantic, but this was East of where the Piri Reis maps shows its longitude.

Originally Posted by HappytheStripper

I figured along time ago.. with logical thought.. that which you speak of.. was related to magnetic pole reversals..

What does a magnetic pole shift have to do with longitude?

[HappytheStripper]

I have no idea.. thats what i was tinking you could tell me??

Ashley

[FrankM]

I have obtained some additional information and I have put it together with the previous information in this post.

At 6:30 am on December 28th, the sun will rise over the peak of the Tacana volcano and illuminate a marker stone at the Izapa Temple in Mexico. That event marks the Winter solstice. The sun will be directly overhead somewhere over the Eastern Atlantic Ocean. I want to determine the longitude at the vertical point.

The best information I have is from two sources. One source gives me the geographic coordinates of the Izapa site, 14.8 deg N latitude and 92.2 deg W longitude.

IZAPA/SITE

The above site also indicates the elevation of the Tacana volcano, 4093 meters (or 13,425 ft). I do not have the elevation of the Izapa Temple site. I have not been able to find a map where I can extract the elevation of the Izapa site.

You cannot extract the azimuth from the map provided in the izapasite.html page because it was not drawn to scale. I contacted the author on that issue.

The azimuth sighting line can be determined knowing the coordinates of the Izapa site and that of the Tacana volcano (using a reasonably good topographic map). The azimuth sighting line is determinable from the web pages below.

Alignment 2012 - John Major Jenkins

Izapa solstice 2006 John Major Jenkins Alignment 2012

I have the event time, the starting geographic coordinates from the Izapa site and can determine the azimuth sighting line from there to the Tacana volcano. I need a reasonably accurate elevation angle.

What equation would provide the longitude if all the sighting point information is available?