Most people are not unfamiliar with the ominous black "hole" present in most government images of the north pole and Arctic sea ice. Well, there is a very good reason for this. As we've gone over before, due to the presence of an actual hole in the top and bottom of the Earth, polar orbiting satellites cannot traverse the opening, thereby creating a dark zone or blackout region where no information is available. Besides, if information was available, it would be nonsensical as there is no land mass or ice to speak of.
Therefore, if you are in the business of determining the size and location of the polar openings to the hollow earth, I'd say it's a pretty safe assumption to place the location of the opening wherever the blackout occurs, ie. the north and south geographic poles. Also, the size is going to be less than the area of the "black dot", which, according to my calculations is 60 to 90 miles in diameter.