NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2019140 SUBJ: SVN34 (PRN18) UNUSABLE JDAY 240/1137 - JDAY 240/1138 1. NANU TYPE: UNUNOREF NANU NUMBER: 2019140 NANU DTG: 281144Z AUG 2019 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 34 PRN: 18 START JDAY: 240 START TIME ZULU: 1137 START CALENDAR DATE: 28 AUG 2019 STOP JDAY: 240 STOP TIME ZULU: 1138 STOP CALENDAR DATE: 28 AUG 2019 2. CONDITION: GPS SATELLITE SVN34 (PRN18) WAS UNUSABLE ON JDAY 240 (28 AUG 2019) BEGINNING 1137 ZULU UNTIL JDAY 240 (28 AUG 2019) ENDING 1138 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