NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2021059 SUBJ: SVN57 (PRN29) FORECAST OUTAGE SUMMARY JDAY 337/0358 - JDAY 337/0931 1. NANU TYPE: FCSTSUMM NANU NUMBER: 2021059 NANU DTG: 030951Z DEC 2021 REFERENCE NANU: 2021056 REF NANU DTG: 291607Z NOV 2021 SVN: 57 PRN: 29 START JDAY: 337 START TIME ZULU: 0358 START CALENDAR DATE: 03 DEC 2021 STOP JDAY: 337 STOP TIME ZULU: 0931 STOP CALENDAR DATE: 03 DEC 2021 2. CONDITION: GPS SATELLITE SVN57 (PRN29) WAS UNUSABLE ON JDAY 337 (03 DEC 2021) BEGINNING 0358 ZULU UNTIL JDAY 337 (03 DEC 2021) ENDING 0931 ZULU. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV MILITARY - GPS OPERATIONS CENTER at HTTPS://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541, COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GPS.AFSPC.AF.MIL MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526. JSPOCCOMBATOPS@US.AF.MIL