triangulation

However, it would still be easily determined to be a nearby satellite as opposed to a distant star by triangulation.

As another commenter pointed out, the North Koreans are probably relying on radio triangulation.

In the 1980s, an example was found of a 4-dimensional manifold with no triangulation.

For instance, if you have a triangulation then lots of things reduce to nice finite computations that you can do on a computer.) Alas!

I'm sure actual radio triangulation/direction finding would be possible as well but I'm not sure how difficult that would be.

It could probably render implicitly using distance fields without even needing triangulation.

Better - Google's Geolocation offers primitive triangulation / trilateration; even if you submit multiple cell towers / WiFis, they locate with just the first one.

Linear interpolation using barycentric coordinates on a triangulation is fast (and might be the most practical method for this particular use case), but nowhere near as good a result as you can get via other methods.

And now I'm thinking about how you might be able to defeat triangulation...

If I'm understanding your comment, you're saying that it would be easy to detect the person with the antenna by doing some triangulation.

Acoustic triangulation of accelerometers in upper stage helped pinpoint the strut, and using only 0.893 seconds of data (unless the accels were in the part that kept transmitting).

Look up DDE - Data dependent triangulation.

> (1) They narrowed down the source of the failure using "acoustic triangulation", which, I think, is essentially using sound sensors (accelerometers?) located at various locations to pinpoint the location of the failure in 3D space.

As a result, even if someone tracked down the location of an IP address, the user wouldn't automatically be discovered." triangulation seems to be a weakness if you can separate it out with other stuff transmitting in that range which I think is quite easy to do with the right hardware.

So I'd classify this as "definitely not known due to lack of knowledge" rather than "definitely not proven." Proposals like Quantum Dynamical Triangulation, Causal Sets, and Loop Quantum Gravity are beginning to ask what spacetime is made of, but they're barely in their infancy.

Or, kinda-oppositely, instead of heading in the direction of increasing smoothness you might head in the direction of increasing discreteness: you might want a "triangulation" of the manifold, meaning that you can build it out of points (0-dimensional) and line segments (1-dimensional) and triangles (2-dimensional) and tetrahedra (3-dimensional), etc., etc., glued together in obvious ways along their faces.