NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2010029 SUBJ: SVN51 (PRN20) UNUSABLE JDAY 046/0806 - UNTIL FURTHER NOTICE 1. NANU TYPE: UNUSUFN NANU NUMBER: 2010029 NANU DTG: 150937Z FEB 2010 REFERENCE NANU: N/A REF NANU DTG: N/A SVN: 51 PRN: 20 START JDAY: 046 START TIME ZULU: 0806 START CALENDAR DATE: 15 FEB 2010 STOP JDAY: UFN STOP TIME ZULU: N/A STOP CALENDAR DATE: N/A 2. CONDITION: GPS SATELLITE SVN51 (PRN20) WILL BE UNUSABLE ON JDAY 046 (15 FEB 2010) BEGINNING 0806 ZULU UNTIL FURTHER NOTICE. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV MILITARY - GPS OPERATIONS CENTER at HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541, COMM 719-567-2541, gps_support@schriever.af.mil, HTTPS://gps.afspc.af.mil MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3514, COMM 805-606-3514, JSPOCCOMBATOPS@VANDENBERG.AF.MIL