NOTICE ADVISORY TO NAVSTAR USERS (NANU) 1999021
SUBJ: SVN18 (PRN18) FORECAST OUTAGE JDAY 060/1245 - JDAY 061/0045
1.     NANU TYPE: FCSTDV
       NANU NUMBER: 1999021
       NANU DTG: 192144Z FEB 1999
       REFERENCE NANU: N/A
       REF NANU DTG: N/A
       SVN: 18
       PRN: 18
       START JDAY: 060
       START TIME ZULU: 1245
       START CALENDAR DATE: 01 MAR 1999
       STOP JDAY: 061
       STOP TIME ZULU: 0045
       STOP CALENDAR DATE: 02 MAR 1999

2.  CONDITION: GPS SATELLITE SVN18 (PRN18) WILL BE UNUSABLE ON JDAY 060
    (01 MAR 1999) BEGINNING 1245 ZULU UNTIL JDAY 061 (02 MAR 1999)
    ENDING 0045 ZULU.

3.  POC: CIVILIAN - NAVCEN AT (703)313-5900, HTTP://WWW.NAVCEN.USCG.MIL
    MILITARY - CAPT TONY OCCHI, 2 SOPS NAVIGATION ANALYST, DSN 560-6378,
    COMM 719-567-6378, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS