GALILEO down since pm Fri 12/7/19
GALILEO down since pm Fri 12 July https://www.bbc.co.uk/news/science-environment-48985399 👇🏼⛵️⛵️ 🚠🛠🔌 PZU - Out of Africa (Retired) |
I think that most users of satellite navigation/positioning systems (SNPS) have no idea of how vulnerable these systems are. So many processes rely on these systems that compromise of, or damage to, these systems would cripple worldwide economies. SNPS are not the only technology vulnerable to accident or fiddling.
Just my opinion. Cheers, Grog |
Not just your opinion:
https://www.gov.uk/government/public...lackett-review Satellite-derived time and position: Blackett review.Many of our critical services, from telecommunications to transport, rely on global navigation satellite systems (GNSS) to operate.This report sets out the findings of a review exploring the UK’s dependency on GNSS. It covers:
Published 30 January 2018 FW |
Out with the Dalton Computers chaps...!
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And don't forget --- MAPS!!!
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Hi,
does anyone have Galileo-based or enabled avionics ? Effects ? |
Not a problem, the enhanced Galileo accuracy services will not be used until the constellation is complete.
The current Galileo satellites are effectively additional GPS satellites of which there are plenty so not an issue. |
The current Galileo satellites are effectively additional GPS satellites Fortunately the problem seem to be on the ground, not on the Sats in place . |
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Well this is somewhat embarrassing to say the least. What kind of ground issue could lead to such a persistent failure? I'm sure that all systems muss be redundant !? Sure it was still in deployment phase but this warrants further digging... |
Looks like it might be fixed, my receiver reports 6 Galileo satellites in range and green
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Originally Posted by The Ancient Geek
(Post 10519399)
Looks like it might be fixed, my receiver reports 6 Galileo satellites in range and green
According to their status page the whole thing is still down |
Ground Failure
Originally Posted by atakacs
(Post 10519304)
Well this is somewhat embarrassing to say the least. What kind of ground issue could lead to such a persistent failure? I'm sure that all systems muss be redundant !? Sure it was still in deployment phase but this warrants further digging... My bet is that a software update broke the constellation. |
Well it might be so (software issue) but it any case it seems like a major issue as it is still ongoing. Surprised that it doesn't make more "noise" in the news. After all this was supposed to be a viable alternative to GPS.... |
This morning my newish cell-phone shows 8 Galileo,
all coloured red, meaning no signal. |
Yup Can't imagine a hardware issue that would not be fixable within 24/48h. Muss be software |
Maybe a mis-op, Fucino do have previous form in that area.
Last time it was 'around the world in 80 days' for a certain satellite. |
Originally Posted by esa-aardvark
(Post 10519814)
This morning my newish cell-phone shows 8 Galileo,
all coloured red, meaning no signal. I am currently decoding both E1 and E5 telemetry but the usability flags are most likely turned off. |
I think the satellite position comes from the almanac.
Signal, however, is usually to be trusted. |
Originally Posted by esa-aardvark
(Post 10520191)
I think the satellite position comes from the almanac.
Signal, however, is usually to be trusted. Since the telemetry is embedded in the carriers, and I am receiving telemetry fine, this means that the spacecraft and payloads are working. My bet is that they are needing to update new ephemeris data. Since the onboard oscillators take a long time to stabilize, my guess is that the clocks were reset or turned off for some reason and now need time to stabilize. Once stabilized, the new ephemeris data can be generated and uploaded to the payloads... in effect, a reboot of the constellation. Then they will set the carrier flags to "usable". |
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