NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2019031 SUBJ: SVN34 (PRN18) UNUSABLE JDAY 063/1857 - JDAY 063/1858 1. NANU TYPE: UNUNOREF NANU NUMBER: 2019031 NANU DTG: 041853Z MAR 2019 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 34 PRN: 18 START JDAY: 063 START TIME ZULU: 1857 START CALENDAR DATE: 04 MAR 2019 STOP JDAY: 063 STOP TIME ZULU: 1858 STOP CALENDAR DATE: 04 MAR 2019 2. CONDITION: GPS SATELLITE SVN34 (PRN18) WAS UNUSABLE ON JDAY 063 (04 MAR 2019) BEGINNING 1857 ZULU UNTIL JDAY 063 (04 MAR 2019) ENDING 1858 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 276-3514, COMM 805-606-3514, JSPOCCOMBATOPS@VANDENBERG.AF.MIL