NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2025056
SUBJ: SVN51 (PRN20) DECOMMISSIONING JDAY 216/2200 
1.    NANU TYPE: DECOM
       NANU NUMBER: 2025056
       NANU DTG: 042211Z AUG 2025
       REFERENCE NANU: 2025055
       REF NANU DTG: 011830Z AUG 2025
       SVN: 51
       PRN: 20
       UNUSABLE START JDAY: 216
       UNUSABLE START TIME ZULU: 1426
       UNUSABLE START CALENDAR DATE: 04 AUG 2025
       DECOMMISSIONING START JDAY: 216
       DECOMMISSIONING START TIME ZULU: 2200
       DECOMMISSIONING START CALENDAR DATE: 04 AUG 2025

2.  CONDITION: GPS SATELLITE SVN51 (PRN20) WAS UNUSABLE AS OF JDAY 216 (04 AUG 2025)
     AND REMOVED FROM THE GPS CONSTELLATION ON JDAY 216 (04 AUG 2025).

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