NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015031 SUBJ: SVN54 (PRN18) FORECAST OUTAGE JDAY 120/2330 - JDAY 121/1130 1 NANU TYPE: FCSTDV NANU NUMBER: 2015031 NANU DTG: 241901Z APR 2015 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 54 PRN: 18 START JDAY: 120 START TIME ZULU: 2330 START CALENDAR DATE: 30 APR 2015 STOP JDAY: 121 STOP TIME ZULU: 1130 STOP CALENDAR DATE: 01 MAY 2015

1. CONDITION: GPS SATELLITE SVN54 (PRN18) WILL BE UNUSABLE ON JDAY 120 (30 APR 2015) BEGINNING 2330 ZULU UNTIL JDAY 121 (01 MAY 2015) ENDING 1130 ZULU

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