Paul Boven schrieb: > Hi everyone, > > Has anyone else seen GPS time jump by -13.7 usec today? > I just heard from several geographically quite distributed radio > observatories that they have seen their GPS receiver(s) jump compared to > their in-house standards.
We have now received an official statement from USCG: -----Original Message----- > From: Hamilton, Stephen R CIV > Sent: Wednesday, January 27, 2016 8:13 PM > To: '[email protected]' > Subject: FW: Official Press Release - GPS Ground System Anomaly > > All CGSIC: > > Air Force Official Press Release - GPS Ground System Anomaly > > On 26 January at 12:49 a.m. MST, the 2nd Space Operations Squadron at the > 50th Space Wing, Schriever Air Force Base, Colo., verified users were > experiencing GPS timing issues. Further investigation revealed an issue in > the Global Positioning System ground software which only affected the time > on legacy L-band signals. This change occurred when the oldest vehicle, SVN > 23, was removed from the constellation. While the core navigation systems > were working normally, the coordinated universal time timing signal was off > by 13 microseconds which exceeded the design specifications. The issue was > resolved at 6:10 a.m. MST, however global users may have experienced GPS > timing issues for several hours. U.S. Strategic Command's Commercial > Integration Cell, operating out of the Joint Space Operations Center, > effectively served as the portal to determine the scope of commercial user > impacts. Additionally, the Joint Space Operations Center at Vandenberg AFB > has not received any reports of issues with GPS-aided munitions, and has > determined that the timing error is not attributable to any type of outside > interference such as jamming or spoofing. Operator procedures were modified > to preclude a repeat of this issue until the ground system software is > corrected, and the 50th Space Wing will conduct an Operational Review Board > to review procedures and impacts on users. Commercial and Civil users who > experienced impacts can contact the U.S. Coast Guard Navigation Center at > (703) 313-5900. > V/R > Rick Hamilton > CGSIC Executive Secretariat > GPS Information Analysis Team Lead > U.S. Coast Guard Navigation Center > 703-313-5930 Martin _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
