NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2011074 NANU TYPE: GENERAL * GENERAL MESSAGE TO ALL GPS USERS The purpose of this notification is to inform users of an upcoming event related to the GPS satellite constellation The 2nd Space Operations Squadron will be installing a ground software upgrade NET 8 September 2011 (J251) There are no planned GPS satellite outages for this activity If military or civil users encounter any user equipment problems they feel are related to this software change, please call the GPSOC (military) or NAVCEN (civil) immediately GENERAL MESSAGE TO ALL GPS USERS *

POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW NAVCEN USCG GOV MILITARY - GPS OPERATIONS CENTER at HTTP://GPS AFSPC AF MIL/GPSOC, DSN 560-2541, COMM 719-567-2541, gps_support@schriever af mil, HTTPS://gps afspc af mil MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3514, COMM 805-606-3514, JSPOCCOMBATOPS@VANDENBERG AF MIL

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