NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2013034 NANU TYPE: GENERAL * GENERAL MESSAGE TO ALL GPS USERS The purpose of this notification is to inform users of an upcoming event related to the GPS satellite constellation Air Force Space Command will be testing CNAV capabilities on the GPS L2C and L5 signals on Jdays 2013/166-2013/182 There are no planned GPS satellite outages or degradations for this activity L2C and L5 CNAV message testing should be transparent to GPS receivers that do not process L2C or L5 CNAV These test events will provide an opportunity for civil users and manufacturers to participate in L2C and L5 evaluation Details on the test plan are located at the NAVCEN web page http://www navcen uscg gov/L2C_L5_CNAV_Test_Plan pdf Any military or civil users who encounter user equipment problems during or after testing should contact the applicable POCs identified below as soon as possible Aviation users should file reports consistent with FAA-approved procedures Users are cautioned that L2C and L5 signals are not operational GENERAL MESSAGE TO ALL GPS USERS *

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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