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GPS glitched across the US by as much as 33 feet

sciencealert.com

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Re: GPS glitched across the US by as much as 33 feet

#11

Post by ck2 »

z2 wrote: post #6
ck2 wrote: post #2

not just space weather, I am pretty sure the atmosphere is being disturbed by toxic human activity both by accident and on purpose I've run outside every morning for decades and used Garmin with GPS since 2015, I've never had so much trouble Garmins finally supports dual-band (L1+L5) and BeiDou on newest models but it's still not enough to compensate, I have to use a Stryd footpod to guarantee accurate distances/spee…

For resiliency reasons alone, it's been proposed to allow (stop software-disabling) BeiDou in the US, but the last time this was brought up, the administration ran out of time. It's a shame, because when there is precise coverage, it enables things like lane-level city navigation. https://warontherocks.com/a-signal-point-of-failure-integrat...

yup that was my first link

but of course this administration is never going allow China-anything like low cost electric cars even if it means saving people a fortune in gas

so hopefully in 2029 it can be looked at again

or maybe Dems will also get the Senate too and can be petitioned if they run out of corruption investigations before 2029

it is critical to explain to everyone who isn't technical that GPS is "read only" and no data is being sent to China via BeiDou (just like it's not sent to Russia's Glonass) because that apparently is some kind of weird misunderstanding

on that same note if they somehow made Starlink into a lower resolution GPS backup I'd even trust that too despite personally being anti-Musk everything

Re: GPS glitched across the US by as much as 33 feet

#12

Post by chaps »

This is exactly the sort of thing that leads to people getting reincarcerated after their electronic monitoring devices mistakenly report them leaving their homes.

Some reporting I did on the topic a few years back: https://chicagoreader.com/news/many-on-house-arrest-in-cook-...

Re: GPS glitched across the US by as much as 33 feet

#13

Post by arijun »

ck2 wrote: post #2

not just space weather, I am pretty sure the atmosphere is being disturbed by toxic human activity both by accident and on purpose I've run outside every morning for decades and used Garmin with GPS since 2015, I've never had so much trouble Garmins finally supports dual-band (L1+L5) and BeiDou on newest models but it's still not enough to compensate, I have to use a Stryd footpod to guarantee accurate distances/spee…

> BeiDou GPS blows away US GPS for number of sats and precision

Both BeiDou and GPS are supposed to be limited to 10m precision for civilians.

But, going down a rabbit hole, I found that BeiDou is way more accurate than 10m--3.6m and 2.6m outside and inside the Asia-Pacific region, respectively [1]. And that's with the most simple algorithm. It goes down to ~2.5m using dual-frequencies to account for atmospheric error.

[1] https://www.nature.com/articles/s41598-022-12012-y

Re: GPS glitched across the US by as much as 33 feet

#15

Post by myself248 »

arijun wrote: post #13
ck2 wrote: post #2

not just space weather, I am pretty sure the atmosphere is being disturbed by toxic human activity both by accident and on purpose I've run outside every morning for decades and used Garmin with GPS since 2015, I've never had so much trouble Garmins finally supports dual-band (L1+L5) and BeiDou on newest models but it's still not enough to compensate, I have to use a Stryd footpod to guarantee accurate distances/spee…

> BeiDou GPS blows away US GPS for number of sats and precision Both BeiDou and GPS are supposed to be limited to 10m precision for civilians. But, going down a rabbit hole, I found that BeiDou is way more accurate than 10m--3.6m and 2.6m outside and inside the Asia-Pacific region, respectively [1]. And that's with the most simple algorithm. It goes down to ~2.5m using dual-frequencies to account for atmospheric erro…

> Both BeiDou and GPS are supposed to be limited to 10m precision for civilians.

Maybe in 1998, but Selective Availability was turned off in 2000, and here in the modern era: https://rtklibexplorer.wordpress.com/2024/04/28/dual-frequen...

Re: GPS glitched across the US by as much as 33 feet

#16

Post by arijun »

ck2 wrote: post #2

not just space weather, I am pretty sure the atmosphere is being disturbed by toxic human activity both by accident and on purpose I've run outside every morning for decades and used Garmin with GPS since 2015, I've never had so much trouble Garmins finally supports dual-band (L1+L5) and BeiDou on newest models but it's still not enough to compensate, I have to use a Stryd footpod to guarantee accurate distances/spee…

It seems that all the device manufacturers (they mention Apple, Samsung, and Google) are using BeiDou anyway. I don't know if that includes Garmin watches, though.

https://www.reuters.com/technology/us-agency-probes-risks-fo...

Re: GPS glitched across the US by as much as 33 feet

#17

Post by nomel »

Insimwytim wrote: post #7

TL;DR: 1. Not today. November 2025. They don't make it clear. 1.1. One would expect that to be put in the title, when the article is written almost a year after that. 1.2. No, the article doesn't state that in the first paragraph. Posting in it full seem to be the only way to fend off lazy comments: In November 2025, Earth was buffeted by several massive eruptions of solar material that slammed into the magnetosphere…

> 2. It is unclear what is the source of the claim.

7th paragraph of the article states the source, and contains a link to research paper where they go into great detail.

Re: GPS glitched across the US by as much as 33 feet

#18

Post by arijun »

myself248 wrote: post #15
arijun wrote: post #13

Earlier quoted context omitted.

> BeiDou GPS blows away US GPS for number of sats and precision Both BeiDou and GPS are supposed to be limited to 10m precision for civilians. But, going down a rabbit hole, I found that BeiDou is way more accurate than 10m--3.6m and 2.6m outside and inside the Asia-Pacific region, respectively [1]. And that's with the most simple algorithm. It goes down to ~2.5m using dual-frequencies to account for atmospheric erro…

> Both BeiDou and GPS are supposed to be limited to 10m precision for civilians. Maybe in 1998, but Selective Availability was turned off in 2000, and here in the modern era: https://rtklibexplorer.wordpress.com/2024/04/28/dual-frequen...

Oh interesting, I think I conflated two things; Selective Availability and the military-only bands on GPS. While it's true that access to the military band could improve accuracy with dual-band receivers, consumer devices can use dual-band as well (as your link shows), since there are multiple unencrypted bands from navigation satellites nowadays.

I am not sure how to interpret your link, though. It doesn't measure accuracy on it's own, and doesn't include a number for precision between the two units.

Re: GPS glitched across the US by as much as 33 feet

#20

Post by hylaride »

arijun wrote: post #18
myself248 wrote: post #15

Earlier quoted context omitted.

> Both BeiDou and GPS are supposed to be limited to 10m precision for civilians. Maybe in 1998, but Selective Availability was turned off in 2000, and here in the modern era: https://rtklibexplorer.wordpress.com/2024/04/28/dual-frequen...

Oh interesting, I think I conflated two things; Selective Availability and the military-only bands on GPS. While it's true that access to the military band could improve accuracy with dual-band receivers, consumer devices can use dual-band as well (as your link shows), since there are multiple unencrypted bands from navigation satellites nowadays. I am not sure how to interpret your link, though. It doesn't measure a…

My understanding is that the encrypted military-level GPS is much more robust against jamming and spoofing. There's probably a lot of capabilities we don't know that's classified, too.
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