During the GPS anomaly on the 25th and 26th of January users had up to six satellites in view transmitting erroneous time signals.

According to John Lavrakas, President of Advance Research Corporation, 15 of the 31 GPS satellites were affected by the SVN23-related software problem. All transmitted signals that included a 13.7 microsecond error. “That meant that for a period of about 14 hours, anywhere you were on the globe you were going to see from one to six satellites with bad signals” Lavrakas said.

An animation showing the faulty signals processing around the globe by Ted Driver of Analytical Graphics, Inc. of Exton, PA is available here.

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