NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2007057 SUBJ: SVN54 (PRN18) FORECAST OUTAGE SUMMARY JDAY 100/1704 - JDAY 100/2124 1 NANU TYPE: FCSTSUMM NANU NUMBER: 2007057 NANU DTG: 102139Z APR 2007 REFERENCE NANU: 2007053 REF NANU DTG: 061804Z APR 2007 SVN: 54 PRN: 18 START JDAY: 100 START TIME ZULU: 1704 START CALENDAR DATE: 10 APR 2007 STOP JDAY: 100 STOP TIME ZULU: 2124 STOP CALENDAR DATE: 10 APR 2007

1. CONDITION: GPS SATELLITE SVN54 (PRN18) WAS UNUSABLE ON JDAY 100 (10 APR 2007) BEGINNING 1704 ZULU UNTIL JDAY 100 (10 APR 2007) ENDING 2124 ZULU

2. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://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, HTTP://gps afspc af mil/gps MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-9994, COMM 805-606-9994, JSPOCCOMBATOPS@VANDENBERG AF MIL

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