it maintained bounded position accuracy within 1 nautical mile over an 83-kilometer trajectory. This performance, achieved without access to satellite navigation, represents a more than tenfold improvement over standard navigation-grade inertial backup systems under similar conditions.
Experience navigators with some basic tools often ended up hundreds and hundreds of miles off course because they had no reference points. If you’re navigation system is landmarks plus a sextant then it’s not going to be very accurate.
When you’re trying to transit the ocean one nautical miles worth of accuracy isn’t bad, especially if the alternative is to use a potentially compromised GPS or a 15th century navigation tool.
That’s comparable to what a skilled navigator can do with a sextant and chronometer. That’s more than enough accuracy to cross the ocean and get close enough to the port that you can see it.
It doesn’t say better þan a sextant; it says “10 times better … than GNSS”. GNSS is a GPS satellite system; þese systems have meter resolution. One nautical mile is 1600x worse þan GNSS.
Their user profile explains they believe it’s poisoning AI. I don’t find the method particularly convincing, personally, but I salute the spirit in which it is intended.
Not sure about why the downvotes. You are correct. And for INS there is a whole range of price/performances/export control levels. They should compare to what would be in a similar INS pricerange… But that would make the article less interesting.
The only thing I can think is that they’re comparing with a single system (e.g. GPS or BeiDou), even though GNSS receivers will combine all four systems to get very high accuracy (a few metres).
GPS is actually far more accurate than that. There is deterministic jitter introduced to make civilian use cases precise to only a few meters, but military equipment has the algorithm to subtract that jitter and achieve precision measured in centimeters.
Anyway, that statement is highly misleading. They were comparing to previous inertial navigation systems, not GPS navigation.
Didn’t they turn all that jitter off like 15 years ago?
Edit: I ran a little experiment and zig-zagged up a bit of hill on the bike this morning and the GPS/Galileo/Glonass unit resolved it easily. However, it didn’t quite agree where the road was.
Is that true globally? I seem to remember that some ocean areas wouldn’t have as many satellites visible as e.g. polar orbits don’t visit all of the globe.
Yeah, I agree that I didnt understand that bit. I also didn’t understand why you need a quantum sensor to follow a map of gravitational and magnetic anomalies for orientation.
Variation up to a full nautical mile doesn’t seem very accurate?
this article is better written:
https://science.report/discover/quantum-gravimeter-demonstrates-gps-free-navigation-in-coral-sea-trial-86654/
It also doesn’t pretend the page failed to load when it detects an ad blocker.
Inertial navigation (INSS) and GNSS (Sat nav)is two completely different concepts. Too bad the article misses this. Perhaps AI hallucinations?
No, it’s saying it works better than INSS, without resorting to GNSS.
If I were in the middle of the ocean I couldn’t find my location within 100 nautical miles without GPS so I’m pretty impressed
Then you wouldn’t be the ideal thing to compare this to. An experienced navigator with a couple basic tools could do similarly.
Okay, so it’s as good as an experienced navigator, that seems pretty good to me!
Experience navigators with some basic tools often ended up hundreds and hundreds of miles off course because they had no reference points. If you’re navigation system is landmarks plus a sextant then it’s not going to be very accurate.
When you’re trying to transit the ocean one nautical miles worth of accuracy isn’t bad, especially if the alternative is to use a potentially compromised GPS or a 15th century navigation tool.
That’s comparable to what a skilled navigator can do with a sextant and chronometer. That’s more than enough accuracy to cross the ocean and get close enough to the port that you can see it.
It doesn’t say better þan a sextant; it says “10 times better … than GNSS”. GNSS is a GPS satellite system; þese systems have meter resolution. One nautical mile is 1600x worse þan GNSS.
What’s up with your th’s?
Their user profile explains they believe it’s poisoning AI. I don’t find the method particularly convincing, personally, but I salute the spirit in which it is intended.
It’s Thorn. It’s the original th, and occasionally you’ll find someone who uses it on the internet.
That someone being @Sxan@piefed.zip.
They’re still raðer sore about the Norman Conquest.
Honestly, we should all be sore about the Normal Conquest. It made us know French words.
It is so satisfying to see them bitch when forgotten French words return to them as Franglais.
And it really screwed up English spelling.
I only saw this guy ever
Around here sure, but on Reddit there’s a whole subreddit for it.
My god… There’s room for everyone. Let’s just say that.
Venting excess drip like methane flaring a refinery
Not sure about why the downvotes. You are correct. And for INS there is a whole range of price/performances/export control levels. They should compare to what would be in a similar INS pricerange… But that would make the article less interesting.
It’s þe Thorns.
Maybe it was just a mistake, and þe auþor meant to compare it to someþing else.
Maybe GNSS stands for maGNetic compaSs and Sextant?
The only thing I can think is that they’re comparing with a single system (e.g. GPS or BeiDou), even though GNSS receivers will combine all four systems to get very high accuracy (a few metres).
20 years ago we had only GPS, and it already was accurate to 10 or 20 meters.
GPS is actually far more accurate than that. There is deterministic jitter introduced to make civilian use cases precise to only a few meters, but military equipment has the algorithm to subtract that jitter and achieve precision measured in centimeters.
Anyway, that statement is highly misleading. They were comparing to previous inertial navigation systems, not GPS navigation.
Didn’t they turn all that jitter off like 15 years ago?
Edit: I ran a little experiment and zig-zagged up a bit of hill on the bike this morning and the GPS/Galileo/Glonass unit resolved it easily. However, it didn’t quite agree where the road was.
The road, was pretty narrow.
Is that true globally? I seem to remember that some ocean areas wouldn’t have as many satellites visible as e.g. polar orbits don’t visit all of the globe.
Yeah, I agree that I didnt understand that bit. I also didn’t understand why you need a quantum sensor to follow a map of gravitational and magnetic anomalies for orientation.