NOTICE ADVISORY TO NAVSTAR USERS (NANU) 1997121
SUBJ: SVN38 (PRN08) USABLE JDAY 352/1524
1.     NANU TYPE: USABINIT
       NANU NUMBER: 97121
       NANU DTG: 181614Z DEC 97
       REFERENCE NANU: N/A
       REF NANU DTG: N/A
       SVN: 38
       PRN: 08
       START JDAY: 352
       START TIME ZULU: 1524
       START CALENDAR DATE: 18 DEC 97
       STOP JDAY: N/A
       STOP TIME ZULU: N/A
       STOP CALENDAR DATE: N/A

2.  CONDITION: GPS SATELLITE SVN38 (PRN08) WAS USABLE AS OF JDAY 352
    (18 DEC 97) BEGINNING 1524 ZULU.

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

***** GENERAL MESSAGE TO ALL GPS USERS ****
SUBJ: GPS RECEIVERS
1. 2 SOPS HAS RECEIVED SEVERAL REPORTS FROM USERS OF MALFUNCTIONING
GPS USER SETS,"USER EQUIPMENT". THIS NOTICE TO NAVIGATION USERS IS TO
REASSURE ALL GPS USERS THAT GPS SATELLITES ARE OPERATING NORMALLY AND
WELL WITHIN SPECIFICATIONS. OUR BEST INFORMATION AT THIS TIME IS THAT
THE SITUATION APPEARS TO BE ASSOCIATED WITH CERTAIN GPS RECEIVERS AND
INVOLVES A PROBLEM WITH CALENDER YEAR ROLLOVER. AGAIN THE GPS
CONSTELLATION IS OPERATING NORMALLY.
               GENERAL MESSAGE TO ALL GPS USERS
2. POC: NAVIGATION ANALYST AT COMMERCIAL (719) 567-6378 OR DSN 560-6378