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January 28, 2016 10:00 pm
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/_wkI3NDoaBU/satellite-failure-behind-gps-timing-anomaly
Satellite Failure Behind GPS Timing Anomaly
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 investigation revealed an issue inthe Global Positioning System ground software which only affected the timeon legacy L-band signals. This change occurred when the oldest vehicle, SVN23, was removed from the constellation. While the core navigation systemswere working normally, the coordinated universal time timing signal was offby 13 microseconds which exceeded the design specifications. The issue wasresolved at 6:10 a.m. MST, however global users may have experienced GPStiming issues for several hours.Read more of this story at Slashdot.
Original Link: http://rss.slashdot.org/~r/Slashdot/slashdot/~3/_wkI3NDoaBU/satellite-failure-behind-gps-timing-anomaly
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