GALILEO down since pm Fri 12/7/19
Thread Starter
Join Date: Jul 2002
Location: N Yorkshire, UK
Age: 73
Posts: 483

GALILEO down since pm Fri 12 July
https://www.bbc.co.uk/news/science-environment-48985399
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PZU - Out of Africa (Retired)
https://www.bbc.co.uk/news/science-environment-48985399
👇🏼⛵️⛵️ 🚠🛠🔌
PZU - Out of Africa (Retired)
Join Date: Nov 2015
Location: Paisley, Florida USA
Posts: 265
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
Just my opinion.
Cheers,
Grog
Last edited by capngrog; 19th Jul 2019 at 05:53. Reason: correct typo
Join Date: Mar 2006
Location: UK
Posts: 23
Not just your opinion:
https://www.gov.uk/government/public...lackett-review
This report sets out the findings of a review exploring the UK’s dependency on GNSS. It covers:
Published 30 January 2018
FW
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:
- threats and vulnerabilities
- sector dependencies (both current and future)
- mitigations
- standards and testing
Published 30 January 2018
FW
Join Date: May 2010
Location: UK
Age: 76
Posts: 1,078
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 of which there are plenty so not an issue.
Pegase Driver
Join Date: May 1997
Location: Europe
Age: 70
Posts: 2,925
The current Galileo satellites are effectively additional GPS satellites

Fortunately the problem seem to be on the ground, not on the Sats in place .
Join Date: Feb 2017
Location: Isla Grande
Posts: 959
Join Date: Jun 2002
Location: Geneva, Switzerland
Age: 55
Posts: 1,666
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...
Join Date: Jun 2002
Location: Geneva, Switzerland
Age: 55
Posts: 1,666
Join Date: Jan 2015
Location: USA
Posts: 25
Ground Failure
My bet is that a software update broke the constellation.
Join Date: Jun 2002
Location: Geneva, Switzerland
Age: 55
Posts: 1,666
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....
Join Date: Jan 2015
Location: USA
Posts: 25
I am currently decoding both E1 and E5 telemetry but the usability flags are most likely turned off.
Join Date: Jan 2015
Location: USA
Posts: 25
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".