NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2025029 SUBJ: SVN55 (PRN15) FORECAST OUTAGE RESCHEDULED 1. NANU TYPE: FCSTRESCD NANU NUMBER: 2025029 NANU DTG: 142334Z APR 2025 REFERENCE NANU: 2025027 REF NANU DTG: 141439Z APR 2025 SVN: 55 PRN: 15 START JDAY: 107 START TIME ZULU: 2100 START CALENDAR DATE: 17 APR 2025 STOP JDAY: 108 STOP TIME ZULU: 0900 STOP CALENDAR DATE: 18 APR 2025 2. CONDITION: GPS SATELLITE SVN55 (PRN15) WILL BE UNUSABLE ON JDAY 107 (17 APR 2025) BEGINNING 2100 ZULU UNTIL JDAY 108 (18 APR 2025) ENDING 0900 ZULU. PLEASE REFERENCE NANU NUMBER 2025027 DTG 141439Z APR 2025 FOR THE ORIGINAL OUTAGE TIME. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV MILITARY - GPS WARFIGHTER COLLABORATION CELL at HTTPS://GWCC-WS.CCE.AF.MIL/GPSOC, DSN 560-2541, COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GWCC-WS.CCE.AF.MIL MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526. JSPOCCOMBATOPS@US.AF.MIL