NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2025083
SUBJ: SVN80 (PRN01) FORECAST OUTAGE SUMMARY JDAY 347/1504 - JDAY 347/2218
1.     NANU TYPE: FCSTSUMM
       NANU NUMBER: 2025083
       NANU DTG: 132219Z DEC 2025
       REFERENCE NANU: 2025082
       REF NANU DTG: 131516Z DEC 2025
       SVN: 80
       PRN: 01
       START JDAY: 347
       START TIME ZULU: 1504
       START CALENDAR DATE: 13 DEC 2025
       STOP JDAY: 347
       STOP TIME ZULU: 2218
       STOP CALENDAR DATE: 13 DEC 2025

2.  CONDITION: GPS SATELLITE SVN80 (PRN01) WAS UNUSABLE ON JDAY 347
    (13 DEC 2025) BEGINNING 1504 ZULU UNTIL JDAY 347 (13 DEC 2025)
    ENDING 2218 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