NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015057 SUBJ: SVN52 (PRN31) UNUSABLE JDAY 173/1919 - JDAY 173/1923 1 NANU TYPE: UNUNOREF NANU NUMBER: 2015057 NANU DTG: 221936Z JUN 2015 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 52 PRN: 31 START JDAY: 173 START TIME ZULU: 1919 START CALENDAR DATE: 22 JUN 2015 STOP JDAY: 173 STOP TIME ZULU: 1923 STOP CALENDAR DATE: 22 JUN 2015

1. CONDITION: GPS SATELLITE SVN52 (PRN31) WAS UNUSABLE ON JDAY 173 (22 JUN 2015) BEGINNING 1919 ZULU UNTIL JDAY 173 (22 JUN 2015) ENDING 1923 ZULU

2. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTP://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

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