Like in the before time?

I have two sets of these that I use. When one of them's for when I'm off road and off-grid and very little works. The other one so that way I can have my kids look at just general road atlases as we travel quite a bit they enjoy seeing and trying to find where we're at. They will come in handy in case of anything happening as far as connectivity and stuff like that.

Store the maps in a laptop case so people think you are breaking out the pc.

Also I love maps and as a kid, in the 80s I had maps of just about everywhere, I collected park maps from all the places I hiked and had geological survey maps of the state I lived in. I kept all the maps in the back of my Datsun 510 station wagon. I got lost very often when driving but I would pull over a dig through the maps till I figured out where I was. I did have one of those big roll up maps that you see in old schools, where you could pull it down and it would roll itself back up, but it from the 40s and it's Africa so there is not any real information on it but it was fun to haul it out un roll it and say " nah I don't think that's it" and let it flap around as it rolls up.

I went looking for an image of my map, and found one. https://oldnewhouse.com/products/vintage-classroom-pull-down-map-of-africa-2196?srsltid=AfmBOoqDLztG46dLMq7Eh-hPMAtz0SEnlpnpdGQUu4GIuE5qwMe7MnqT

My map doesn't look as nice because someone kept it in the back of a Datsun station wagon and used it as a joke prop.

You have to get ones that used to be at rest areas and stuff that are comically large and impractical to use in a car. Much less try to fold.

Looks up Here in the map index... D3 sees this side of the map starts at 13, flips map over, finds D and 3, looks up and slams on brakes before rear ending an even more lost pedestrian.

"You should watch where you're driving," my passenger says before their eyes return to their phone.

Honks horn, pedestrian is startled out of examining their map, gives a sheepish wave of apology and speeds off. Return to map, notice there's a big traffic jam on the intended route, turn down a side street instead, thanking map for helping.

Getting your timing source through fiber is definitely the best way to go, as long as you have a backup timing source OTA like GPS and other GNSS in case the fiber gets cut.

Modern receivers SHOULD be using whatever GNSS is in view, including Galileo, QZSS, GPS, Beidou, and GLONASS. They SHOULD be internet connected to get authentication and trust certificates.

However, there are 10 billion pieces of GNSS receivers out there, so not all of them are modernized.

The thing is, China has their own GNSS called Beidou (pronounced like Play-Dough if I've been informed correctly). China has spent the last 10 years convincing non-aligned countries (Brazil and most of South America, many African nations, etc) to switch to using it instead of GPS. An attack by Russia would be "condemned" by China but would actually be a boon to them and their allies. Europe has their own GNSS, too, but it is much less widely used.

Yeah, like, what nation wouldn't see this as an act of war if deployed on a targeted and continous scale?

I mean, they have their own system: GLONASS. Their closest ally in China also has their system: Beidou. Many of their trading partners use Beidou or a mix of Galileo (EU's system) and GPS and any other system in view. They are jamming GPS over a wide swath of territory already, so they know how to handle it within their borders. The world economy would crash, but it would be less of a crash in countries allied with China. Also, Russia's economy is so fucked right now that a worldwide crash would just be a blip.

Considering the impact of these tests, that doesn’t seem likely. You wouldn’t be sending covert messages in a way that would be so heavily scrutinized. I know it was a theory presented during the video, but that’s just journalistic integrity.

And ultimately, even if they were covert messages, now they also know they can disrupt gps

I thought that was the cover story. They deliberately used a channel partially in the bandwidth for some deniability. It isn't like they didn't know what bandwidth GPS used when they designed the satellite.

Yes, that's the video I watched. Good stuff.

last I checked that channel was owned by private equity so take it with a grain of salt

GPS satellites send at like 25W of power. Naively I would think you could make that 2.5kW on a satellite without issues, probably even more.

I deal with this every day with the dark fleet using four enterprise AIS tracking systems and can 100% confirm this is accurate about GNSS systems.

It was probably this one by Veritasium.

I mean, he did say he sold out to private equity cause he wanted to retire basically. His channel is basically now his retirement investment

His "light-year long" cable video did not make claims that were disproven. Veritasium correctly demonstrates the principles of electric field theory, fully as described by the Maxwell equations, and his follow up video demonstrates the effect much more clearly, because his first video was controversial for being misleading.

If you have an undergraduate level understanding of lumped element model of circuits, it's understandable to see why this seems "wrong", but that is not how physics works in reality when we look at the real analog world. If you don't believe me, feel free to DM me and I can explain better. I work in analog electronics for audio and rf circuits and studied device physics as well.

You do know that you can block channels, right?

Fern is also sold out to some PE

Planes don't? That plane flying off course and getting shot down lead to GPS signals being made accessible to the public.

“GPS” would mean GNSS satellite systems like GPS, as well as terrestrial systems like AGPS and base-station-based triangulation. Given that modern train control systems involve transponders alongside the railway line, these can be used as well. Railway lines running through tunnels in particular would rely on non-satellite systems.

Why?

Article should say GNSS

For some reason I thought block 3 gps has some kind of rotating side channel bit selection method to resist jamming “perform more consistently in poor electromagnetic conditions” or some such…