97-million-year-old fossils reveal the earliest known animal "GPS"

Umm, no, serious, world wide navigation in the current era of GPS jamming and spoofing over wide areas of the world.

Using state of the art low drift, high accuaracy gyros and automatticaly updated by whatever navigation resources remain available.

You did not indicate that you quoted from it.

That is what I said.

This claim has been tagged "[citation needed]".

This claim is missing a citation, and a caveat is added in the footnote "[a]".

I will check those claims for feasibility later, when I have the time.

F'up2 sci.physics again. When will you stop amok-crossposting?

First Article test on one production-level unit. Test every pin, every power supply, every function, every command, check the manual.

I'm doing one now. Real nuisance.

Fair enough. Note that people have known about G.P.S. jamming and spoofing for at least a decade, probably more. It was around 2015 when I got interested in cryptography and computer security, and encountered such notions in the literature.

So, it's a little /annoying/ but very human [1] that we have waited un- til now to make it happen.

So now you need to account for the /whatever navigation resources/ be- ing also spoofed. I mean, people can intentionally fiddle with wifi signals in order to make you think -- or at minimum, make Google think

-- you're somewhere you're not.

That has happened to me, before, when it "helpfully" associated a mobile wifi dongle as /home/. Here is an article that is /helpfully/ trying to make you buy something expensive,

That was certainly /more accurate/ than just using the G.P.S. signal I guess, no matter it pinned my map to the wrong city.

On that subject, maybe I should buy one of these mobile wifi plastics for myself, since I'm out and about more than I used to? The common wisdom here, ca. decade ago, is that they provided better mobile signals than the phones on their own.

Something to ask next time I find myself in a mall. Are you American, do you have many deserted malls in your area? Not that it matters to the discussion at hand, but here they flourish.

Anyway, this is an /old/ problem, but wasn't used maliciously enough to matter until in the last four years or so, and now people are scrambling to figure out how to counter it. Shouldn't they have had the technology already on the market, ready and waiting for the /opportunity/? Isn't that what Milton Freedman is always teaching us, in his videos?

Best wishes, and happy location technology!

What I find interesting is that I find no such idiom nor expression in English dictionaries of the same kind. Don't the English and the Ameri- cans also have children, and wells?

So, what happens if you put a fridge magnet on the sensor? That's not explicitly covered in the article that I merely skimmed through.

Shouldn't that /distort/ at least the magnetic field surrounding the apparatus? [1] How does the built-in software cope with that? Can it read the rest of the magnetic earth wrong because of it?

And what happens if you exponentialize the budget, and use one of them rare earth magnets instead with a much greater Tesla [2]?

I'm sure the /Defense Innovation Unit/ has thought of all these quest- ions, but being a three letter agency, don't always tell us the truth.

Best wishes, and happy magnetism!

Don't do that.

John Larkin Highland Tech Glen Canyon Design Center Lunatic Fringe Electronics

It's much worse than that.

The World Magnetic Model High Resoluion (WMMHR2025) has a spatial resolution of about 300 kilometers at the equator and about 200 kilometers at mid latitudes.

The accuracy is also highly dependent on the geomagnetic activity level.

This will never be a high accuracy geolocation system.

Surely there are magnetic variations at finer grain. Rocks, hills, trees, all sorts of stuff will make a complex magnetic landscape that can be mapped, and that a low-flying plane could use in combination with many other things to navigate.

Birds and fish seem to do it. I guess they are too uneducated to appreciate that it's impossible.

Are you aware that about 75% of the Earth's surface is water?

Are you aware that the Earth's magnetic field is in constant flux? Pun intended.

Most of the data for the Earth's magnetic field is from orbit, which introduces yet more errors. There are only about 160 land based measurement points on the entire planet.

Who is going to pay for this massive effort?

Birds navigate to Georgia.

Airplanes navigate to the final approach fix for runway 27R at Hartsfield/Jackson Atlanta International Airport.

I suspect that the US DoD is working on it. Maybe Ukraine too.

Birds navigate back to their nest too. Salmon navigate back to within meters of their place of birth.

Google says

AI Overview

Birds navigate with extraordinary accuracy, often flying thousands of miles across featureless oceans or continents to return to the exact same nesting tree or wintering site year after year with little to no deviation

My question is, why would a fish or a bird bother to return to exactly the same place? Wouldn't one tree or one puddle be just as good as another?

Is it a family thing?

I guess it's something about /territoriality/. It's not too stupid when you try to think of it in terms of survival. If your previous nesting place was good, you want to use it again. Right up until it isn't there, or a predator starts eating all the eggs. Then it's time to find a different nesting place.

There is comfort in knowing both where the eggs are, and where all the food is. And not have to struggle to find a new nesting place, with un- known distances to all the food.

Best wishes, and happy nesting!

Surely not by magnetic sense alone.

Jeroen Belleman

If they bred there successfully once, why change?

Jeroen Belleman

Nor do airplanes typically land without the pilot looking out the window. I hope. At minimum, the landing strip should be visible with all the flood lights typically applied to airports.

Given the potential accuracy my guess is the technology will go nowhere.

If one wants a difficult to jam or spoof backup for GPS, then it will be eLoran and that is already being implemented in South Korea and the UK. The US has an established mandate for a backup and it too will likely be eLoran but as yet such has no funding.

BFD.

What birds are actually doing is not all that complex and not all birds are capable of such things.

First off not all birds or fish do such things.

Secondly you have no clue how long a bird spent flying around looking for "their" place once they got to in the general area.

Some birds navigate to within a few inches

So do I!