NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013004 SUBJ: SVN51 (PRN20) FORECAST OUTAGE SUMMARY JDAY 016/2054 - JDAY 017/0217 1 NANU TYPE: FCSTSUMM NANU NUMBER: 2013004 NANU DTG: 170225Z JAN 2013 REFERENCE NANU: 2013002 REF NANU DTG: 101717Z JAN 2013 SVN: 51 PRN: 20 START JDAY: 016 START TIME ZULU: 2054 START CALENDAR DATE: 16 JAN 2013 STOP JDAY: 017 STOP TIME ZULU: 0217 STOP CALENDAR DATE: 17 JAN 2013

1. CONDITION: GPS SATELLITE SVN51 (PRN20) WAS UNUSABLE ON JDAY 016 (16 JAN 2013) BEGINNING 2054 ZULU UNTIL JDAY 017 (17 JAN 2013) ENDING 0217 ZULU

2. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://WWW NAVCEN USCG GOV MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS AFSPC AF MIL/GPSOC, DSN 560-2541, COMM 719-567-2541, gpsoperationscenter@us 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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