NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2000004
SUBJ: SVN21 (PRN21) FORECAST OUTAGE JDAY 012/0030 - JDAY 012/1230
1.     NANU TYPE: FCSTMX
       NANU NUMBER: 2000004
       NANU DTG: 062110Z JAN 2000
       REFERENCE NANU: N/A
       REF NANU DTG: N/A
       SVN: 21
       PRN: 21
       START JDAY: 012
       START TIME ZULU: 0030
       START CALENDAR DATE: 12 JAN 2000
       STOP JDAY: 012
       STOP TIME ZULU: 1230
       STOP CALENDAR DATE: 12 JAN 2000

2.  CONDITION: GPS SATELLITE SVN21 (PRN21) WILL BE UNUSABLE ON JDAY 012
    (12 JAN 2000) BEGINNING 0030 ZULU UNTIL JDAY 012 (12 JAN 2000)
    ENDING 1230 ZULU.

3.  POC: CIVILIAN - NAVCEN AT (703)313-5900, HTTP://WWW.NAVCEN.USCG.MIL
    MILITARY - CAPT PAUL HERMANN, 2 SOPS NAVIGATION ANALYST, DSN 560-6393,
    COMM 719-567-6393, GPS@SCHRIEVER.AF.MIL, HTTP://WWW.SCHRIEVER.AF.MIL/GPS