reply to post by DelMarvel
First Thanks for everyone's interest in this subject. At least I know I am not alone in my wonder... Second as to GPS. GPS relies on satelites. I do
not know if the earth has shifted or if it is wobbling whether that would cause the satellites to move as well. Also, I am not positive but I do not
see why the GPS satellites could be quickly corrected to account for changes in orbit, rotation, etc. I would assume that sattelite positions,
orbits, etc change.
Also, I never really told anyone about my past experience. I have over thirteen years in the military. I have learned a lot about land navigation
using the old fashined method, with a compas, also with dead reconning, as well as GPS. In my many many many days, weeks, and months in the field I
have gotten numerous bad GPS readings. I have had my GPS off by as much as 100 meters at times. Quite often the GPS reading would be at least +/- 5
meters. From my experience looking at the stars if you are five meters off from where you think you are supposed to be then all of your bearings will
be thrown off.
That is why we teach soldiers how to use a compass first. Then once you ahve that down you can use a GPS.
I have also had experiences using vehicle GPS whereby the GPS will show me driving in a field or through a building when in fact I am on the road.
Although I have not used GPS in quite a while.
I think the scientific method is the best way to figure this out. But not the science of others who claim to know.. We all should check this out for
I suggest we all do this:
1. Get a compass.
2. Pick a fixed position where you have a good view of the western sky. Or eastern sky if you can..
3. Mark a specific spot. With a rock, tape, rope, or something that will not move. If you move a few feet your observations will be afftected.
4. Pick identifiable landmarks such as trees, buildings, light poles, flag poles...
5. Try to identify a landmakr that is exactly due west. Try to identify a landmark that is due north. If you can try to identify the position of
other landmarks. You will then have to identify anything that might throw your perception off. For example a crooked tree may alter your perception.
Also you are likely to assume that a flag pole or lightpole would be perfectly straight but if it is leaning at all it could affect your
observations. It is impossible for me to describe everything that would affect your observations... clouds, rain, etc... The level of the ground on
which you are standing... But try to avoid anything that might throw you off.. Also if using a compass remember it is magnetic and can potential be
thrown off by nearby magnetic sources.
6. Track the position of the sun as it sets (or rises if you are facing east).
7. We then have to compare to the official position. and historical positions.
Then we have to figure out what all that means...
edit on 30-7-2012 by crazyguy2012 because: spelling...
edit on 30-7-2012 by
crazyguy2012 because: more spelling errors. well typing errors mostly. I need more coffee...