NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2025046
SUBJ: SVN81 (PRN21) USABLE JDAY 176/2041 
1.     NANU TYPE: USABINIT
       NANU NUMBER: 2025046
       NANU DTG: 252044Z JUN 2025
       REFERENCE NANU: N/A
       REF NANU DTG: N/A
       SVN: 81
       PRN: 21
       START JDAY: 176
       START TIME ZULU: 2041
       START CALENDAR DATE: 25 JUN 2025
       STOP JDAY: N/A
       STOP TIME ZULU: N/A
       STOP CALENDAR DATE: N/A

2.  CONDITION: GPS SATELLITE SVN81 (PRN21) WAS USABLE AS OF JDAY 176
    (25 JUN 2025) BEGINNING 2041 ZULU.

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