NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2015071 SUBJ: SVN53 (PRN17) FORECAST OUTAGE SUMMARY JDAY 209/1624 - JDAY 209/2132 1 NANU TYPE: FCSTSUMM NANU NUMBER: 2015071 NANU DTG: 282144Z JUL 2015 REFERENCE NANU: 2015070 REF NANU DTG: 211929Z JUL 2015 SVN: 53 PRN: 17 START JDAY: 209 START TIME ZULU: 1624 START CALENDAR DATE: 28 JUL 2015 STOP JDAY: 209 STOP TIME ZULU: 2132 STOP CALENDAR DATE: 28 JUL 2015

1. CONDITION: GPS SATELLITE SVN53 (PRN17) WAS UNUSABLE ON JDAY 209 (28 JUL 2015) BEGINNING 1624 ZULU UNTIL JDAY 209 (28 JUL 2015) ENDING 2132 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