US GPS statement
Neil Degrasse FB
In January 2016, during the decommissioning of GPS satellite SVN 23, a software error in the ground control system caused 13 other satellites to transmit timing data that was incorrect by 13.7 microseconds. While this may seem like a tiny mistake, such an error had major consequences. Systems that rely on precise GPS timing including telecom networks, digital broadcasting, financial exchanges, and power grids were affected. Thousands of timing faults and alarms were triggered globally, disrupting normal operations in many countries for several hours.
Though the error did not affect GPS location services for most users, it exposed just how dependent modern infrastructure is on accurate time signals from space. The incident served as a wake-up call for organizations and governments, emphasizing the need for backup systems, better monitoring, and rigorous testing when updating critical technology. It remains one of the most significant GPS timing glitches in history.
BBC 2 feb 2016
An error with the Global Positioning System (GPS) network has been blamed for causing problems with digital radio broadcasts last week
While the core navigation systems were working normally, the co-ordinated universal time timing signal was off by 13 microseconds which exceeded the design specifications," said the US Air Force.
DAB digital radio service was disrupted for several hours
zoe twitter
Grok checked:
The Jan 2016 SVN 23 decommissioning caused a ~13 µs UTC timing error that disrupted BBC DAB radio and North American public-safety networks.
Civilian GPS L1 is unauthenticated and extremely weak, so low-power SDR spoofing (including gradual time-walking) is feasible.
The cited thresholds match real standards:
5G TDD ±1.5 μs,
ΙΕΕΕ C37.118 ~26 µs for 1% TVE at 60 Hz, and
MiFID II RTS 25 100 μs for HFT.
The listed mitigations (OSNMA, multi-GNSS, CRPA, PTP/fiber + holdover) are also correct.
SVN23
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