- cross-posted to:
- technology@lemmy.zip
- cross-posted to:
- technology@lemmy.zip
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Lemme guess, Starlink will magically be suggested.
Yeah. It’s grift. They want a privatized solution.
Or GLONASS
Pretty much every GPS-capable device made in the last decade uses all systems available: GPS (USA), GLONASS (Russia), and Galileo (EU).
For those who are unfamiliar with it:
GLONASS (ГЛОНАСС, IPA: [ɡɫɐˈnas]; Russian: Глобальная навигационная спутниковая система, romanized: Global’naya Navigatsionnaya Sputnikovaya Sistema, lit. ‘Global Navigation Satellite System’) is a Russian satellite navigation system operating as part of a radionavigation-satellite service.
We’re too dependent on a technology that we spent tens of billions of dollars researching and perfecting over decades of research!
Possibly the dumbest statement I’ve heard this week.
It’s not as dumb as you make it out. The issue isn’t that GPS is really, really good at what it does; it’s that it’s also incredibly vulnerable to disruption and spoofing. And due to the particulars of how GPS works, we can’t entirely fix that. We can do some things to ameliorate it, but a lot of those aren’t suitable for smaller things that use GPS today.
The other thing is that GPS largely replaced a tremendous number of other navigation aides and techniques, including other radio-navigation systems like LORAN-C.
Nah the idea is sound. As someone else said, GPS is incredibly fragile. Also very terrestrial…it doesn’t work once you leave the atmosphere.
This will probably be another SpaceX grift, but there are alternative technologies that are more resilient to attack. From military/defense perspective (the original reason for GPS), that’s pretty important.
GPS is incredibly fragile.
No, not really. The GPS signal isn’t designed to penetrate concrete, no. But that doesn’t make it fragile.
Also very terrestrial…it doesn’t work once you leave the atmosphere.
Considering it was never meant to…that’s really not that goddamn weird. It’s a global positioning satellite system. So clearly for it to work you have to be on the fuckin’ globe…
Having functional GPS in a tunnel would be very nice…as someone who drives through Boston and fucking hates tunnels.
But that’s not what I meant by fragile. I meant it can be disrupted/jammed fairly trivially.
Having functional GPS in a tunnel would be very nice
In a tunnel
a tunnel
tunnel
I fear for the world. You afraid that you’re gonna make a wrong turn? Inside of a tunnel? A fuckin’ tunnel my guy?
You have clearly never driven on 93 through Boston where the person you replied to said they are from (aka the Big Dig). It is basically an entire highway that is underneath the city. There are many on and off ramps, lanes suddenly become exit only, complex multi-lane exits that branch…it’s intimidating. As somebody that has lived in the Boston area for 15 years now, I still mess things up.
Global Positioning System, I sleep
Universal Positioning System, real shitThere was an article today about how they just used GPS on the moon.
In comes starlink to the rescue. But in typical Musk fashion it won’t doesn’t do what’s advertised and cost a shit ton more
It’s literally him convincing someone to sell their house that they own outright to rent from him because it’s somehow much better (for him of course). It’s so fucking stupid.
Remember that time he claimed Teslas windows were shatterproof and indestructable. Then he throws a baseball and the window instantly shatters?
Was a ball bearing. Same guy threw a baseball a couple years ago and it didn’t break.
And was the second time that window had the ball bearing thrown at it. They’d tested it backstage but didn’t replace that window for the on stage demo, so it was already weakened.
Yeah I’m gunna be frank on this one… it’s GOOD that it broke. If you’re in a car fire (which these seem to do often), you want to be able to break out a fucking window to get out.
Any civilian that wants a window that strong is too stupid to properly risk evaluate the features of a car.
Wonder if they want to track all phones with a different system.
Don’t need GPS to track phones. You triangulate the receivers.
What if we built a system of beacon transmitters that sent out pulses and then used recievers that would compare arrival times of those pulses to make a measurement, thus establishing positional location?
We could call it the Long Range something or other. I’m open to suggestions. Need a catchy name!
You are so close to VOR!
They’re describing LORAN.
Lmao what a fucking dipshit
Sounds like this guy couldn’t find his own ass with two hands, a compass and a GPS receiver.
He sounds like the type of person who would drive into a lake if the GPS told him to
So… maps?
Time to bust out the compass.
I live in an area with a lot of iron. I cannot trust a compass to always point north. Generally I’ve had no problems in the woods: follow the trails that are on the maps, or at least stay close enough that you can always find them again and you are fine. (until of course you are not)
Triangulation could be more efficient than GPS, in terms of energy use and such
Triangulation of what, exactly? GPS already triangulates your position based on what it receives from multiple satellites, yeah?
Cell towers, in an urban area you’re typically within range of a couple.
Triangulation of GPS signals is what allows the System to determine your Position Global(ly)
Phones already do that with cell towers. It’s called A-GPS (augmented GPS). Cell towers, wifi, and even bluetooth, are used in addition to GPS/GLONASS/Galileo signals.
GPS literally triangulates your position using 3 satellites. It’s how it works.
No, you need 4 minimum.
Two satellites intersection places you on a circle. (all points possible)
Three satellites intersection places you on two possible points.
The last satellite give you the exact location.
However, the 4th can be omitted if one of the 2 points is not in a sane location. (eg well below the crust). And it’s trilateration not triangulation.
The reality is that your phone/device will use like a dozen satellites.
Uhhh nope, that’s incorrect.
The way triangulation works is by essentially measuring distance.
So 1 satellite distance puts you anywhere in a radius (circle) of that satellite.
2 Satellites puts you at 1 of 2 locations where those radiuses intersect.
3 satellites gives you a single location.
That’s why it’s called triangulation. Tri = 3
Oh boy, where do I even start? This comment is wrong in multiple ways. Let’s break it down:
-
“The way triangulation works is by essentially measuring distance.”
- Nope. This describes trilateration, not triangulation.
- Triangulation uses angles, while trilateration uses distances. GPS works via trilateration.
-
“1 satellite distance puts you anywhere in a radius (circle) of that satellite.”
- Kind of, but missing a crucial detail:
- A single satellite defines a sphere around itself (not just a circle—you exist in 3D space).
- Kind of, but missing a crucial detail:
-
“2 Satellites puts you at 1 of 2 locations where those radiuses intersect.”
- Wrong. Two satellite distance spheres intersect to form a circle, not just two points.
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“3 satellites gives you a single location.”
- Mostly right, but incomplete.
- In theory, three satellites narrow it down to two possible points, but one is often out in space or somewhere unrealistic, so it can often be ruled out.
- However, because your device lacks an atomic clock, it typically requires four satellites to synchronize time properly.
-
“That’s why it’s called triangulation. Tri = 3”
- Nope. GPS does NOT use triangulation.
- The “tri” in triangulation comes from angles, not the number of satellites. GPS uses trilateration, which is based on measuring distances, not angles.
Final Verdict
This comment is a trainwreck of incorrect terms and flawed explanations. If they meant “trilateration,” at least part of it would make sense, but calling it “triangulation” completely ruins their credibility.
So, in short? No, their comment is very incorrect. 🚨
A single satellite defines a sphere around itself (not just a circle—you exist in 3D space).
You are not getting a 3 dimensional location. That’s why GPS coordinates only exist on 2 planes. You don’t know what you’re talking about.
Final Verdict
You’re not just wrong, you’re wrong AND you’re a dick about it.
You are not getting a 3 dimensional location. That’s why GPS coordinates only exist on 2 planes. You don’t know what you’re talking about.
Coordinates on a sphere is a 3 dimensional location. The earth isn’t flat.
Edit: Please education yourself before you’re so confident in your own bullshit answer. https://gisgeography.com/trilateration-triangulation-gps/ and https://www.gps.gov/multimedia/tutorials/trilateration/
Satellites broadcast a sphere, not a circle. And that sphere doesn’t land on the earth as a perfect circle for relatively obvious reason… since the ground isn’t perfect flat, nor is the earth perfectly spheroid.
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They should use that in GPS! /s
Too often, the vertical location (Z-axis) information that 911 call centers receive is not easily usable
So…use the barometer in tandem with GPS? This is shit I can easily track from my personal Homassistant server.
Also, you know how to make GPS more reliable, secure, and redundant? You launch more GPS satellites.
Also, you know how to make GPS more reliable, secure, and redundant? You launch more GPS satellites.
But where will we find room for more Starlink satellites if we do that? Elon said he needs another contract, and when the boss says jump…!
/s
GPS depends on a friendly spectrum. I suspect the FCC is preparing for a war where GPS will be jammed, faked, or destroyed.
In walks GLONASS I presume
Every GPS-capable device made in the last decade utilizes GPS, GLONASS, and Galileo.
Google and Apple and others already do that ad hoc, using signal strength from Bluetooth and WiFi beacons. Can contribute to that by just setting up a wireless access point or several near where you want more signal. Doesn’t even need to be Internet-connected.
