NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2019063 SUBJ: SVN34 (PRN18) UNUSABLE JDAY 115/1636 - JDAY 115/1637 1. NANU TYPE: UNUNOREF NANU NUMBER: 2019063 NANU DTG: 251639Z APR 2019 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 34 PRN: 18 START JDAY: 115 START TIME ZULU: 1636 START CALENDAR DATE: 25 APR 2019 STOP JDAY: 115 STOP TIME ZULU: 1637 STOP CALENDAR DATE: 25 APR 2019 2. CONDITION: GPS SATELLITE SVN34 (PRN18) WAS UNUSABLE ON JDAY 115 (25 APR 2019) BEGINNING 1636 ZULU UNTIL JDAY 115 (25 APR 2019) ENDING 1637 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