NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2012021 SUBJ: SVN55 (PRN15) FORECAST OUTAGE JDAY 103/1200 - JDAY 103/2330 1 NANU TYPE: FCSTDV NANU NUMBER: 2012021 NANU DTG: 062024Z APR 2012 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 55 PRN: 15 START JDAY: 103 START TIME ZULU: 1200 START CALENDAR DATE: 12 APR 2012 STOP JDAY: 103 STOP TIME ZULU: 2330 STOP CALENDAR DATE: 12 APR 2012

1. CONDITION: GPS SATELLITE SVN55 (PRN15) WILL BE UNUSABLE ON JDAY 103 (12 APR 2012) BEGINNING 1200 ZULU UNTIL JDAY 103 (12 APR 2012) ENDING 2330 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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