Just a coincidence.
I think someone is refusing to return a slab to someone.
Galileo navigation system facing service degradation or loss of signal
21–30 of 37 posts
Re: Galileo navigation system facing service degradation or loss of signal
#22Fun fact, the Galileo system was designed to be more accurate and difficult to jam than the civilian GPS but after the US saw this a potential threat and considered shooting down the satellites in case of a global conflict, the design was switched to a frequency they could easily jam.[1] [1] https://en.wikipedia.org/wiki/Galileo_(satellite_navigation)...
That's not what the link you provided says.
The new Galileo frequency is just as hard to jam as the original frequency. The change was made to allow blocking or jamming of one GNSS without affecting the other.
Re: Galileo navigation system facing service degradation or loss of signal
#23Fun fact, the Galileo system was designed to be more accurate and difficult to jam than the civilian GPS but after the US saw this a potential threat and considered shooting down the satellites in case of a global conflict, the design was switched to a frequency they could easily jam.[1] [1] https://en.wikipedia.org/wiki/Galileo_(satellite_navigation)...
It seems like the situation was resolved in the best way possible. It is not that Galileo was harder to jam, but that jamming Galileo would also mean jamming their own GPS. So they settled on using different frequencies, which means you can jam one without jamming the other, and vice versa.
Also, possibly as a result of these negotiations, the US said they will stop using selective availability for GPS.
For me, that's the best solution for everyone, at least in times of peace. And in times of war, well, all bets are off anyways.
Re: Galileo navigation system facing service degradation or loss of signal
#24All of the satellites? What could possible cause all of them to fail at the same time? It's not hardware because they weren't all switched at the same time. Software?
Satellites are just part of the GNSS system. There are multiple control centers and network of sensor , uplink, telemetry, tracking and control stations around the world.
The problem is most likely on the ground. When GNSS satellites are not getting updated data from the ground stations their accuracy starts to degrade.
Re: Galileo navigation system facing service degradation or loss of signal
#25Earlier quoted context omitted.
What makes a frequency easy to jam?
>The frequency initially chosen for Galileo would have made it impossible for the US to block the Galileo signals without also interfering with its own GPS signals. Not an answer to your question but it was more about being able to jam GNSS while still being able to use GPS.
That would actually be the sane solution against stupid warfare..
Re: Galileo navigation system facing service degradation or loss of signal
#26Since the website itself is not working, here is gsc-europa's own dashboard:
https://www.gsc-europa.eu/system-status/Constellation-Inform...
This is the specific incident: https://www.gsc-europa.eu/notice-advisory-to-galileo-users-n...
Seems to have started 2019-07-11 14:45 (UTC) so a couple of days ago.
Apparently, they used to have failures with the clocks (https://en.wikipedia.org/wiki/Galileo_(satellite_navigation)...) so might be something similar.
Re: Galileo navigation system facing service degradation or loss of signal
#27All of the satellites? What could possible cause all of them to fail at the same time? It's not hardware because they weren't all switched at the same time. Software?
Sounds kind of like the recent global Cloudflare outage. That outage started with a regex (WAF rule) being pushed out that immediately exhibited pathological backtracking behavior and "caused CPUs to become exhausted on every CPU core that handles HTTP/HTTPS traffic on the Cloudflare network worldwide."
https://blog.cloudflare.com/details-of-the-cloudflare-outage...
Re: Galileo navigation system facing service degradation or loss of signal
#28There was a recent study [1] looking into the economic impact of GPS in the US which "estimate that the loss of GPS service would have a $1 billion per-day impact". Not sure how that translates to Galileo GNSS.
[1] https://www.rti.org/sites/default/files/gps_finalreport.pdf
Re: Galileo navigation system facing service degradation or loss of signal
#29Re: Galileo navigation system facing service degradation or loss of signal
#30Since the website itself is not working, here is gsc-europa's own dashboard: https://www.gsc-europa.eu/system-status/Constellation-Inform... This is the specific incident: https://www.gsc-europa.eu/notice-advisory-to-galileo-users-n... Seems to have started 2019-07-11 14:45 (UTC) so a couple of days ago. Apparently, they used to have failures with the clocks ( https://en.wikipedia.org/wiki/Galileo_(satellite_navigati…
> Apparently, they used to have failures with the clocks
That would explain if a few of them were weird, but the report said "SATELLITE AFFECTED: ALL" which would be quite a coincidence if each clock on each satellite failed at the same time.