Bismillah writes: The recent 13-microsecond timing anomaly was caused by a satellite failure triggering a “software issue”, the USAF 50th Space Wing has confirmed. Such an error is large enough to cause navigation errors of up to 4 km. Luckily, no issues with GPS guided munition were reported.
Reader donaggie03 adds a link to the official explanation from Rick Hamilton, Executive Secretariat of the Civil Global Positioning System Service Interface Committee. From Hamilton’s email:
Further…
Satellite Failure Behind GPS Timing Anomaly
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