NOTICE ADVISORY TO NAVSTAR USERS (NANU) #017-91018
SUBJ: PRN9 UNUSABLE 18/1905 UTC UNTIL FURTHER NOTICE
1. CONDITION: PRN9 (MCS: SVN6) WAS SET UNUSABLE ON DAY 18 (18 JAN 91) AT 1905
UTC UNTIL FURTHER NOTICE. THE ALMANAC HEALTH FOR PRN9 IS SET USABLE IN ALL GPS
SATELLITES; HOWEVER, THE EPHEMERIS HEALTH CODE IN PRN9 IS SET UNUSABLE.
2. RECOMMENDATION: ADDITIONAL INFORMATION CONCERNING PRN9 WILL BE
ISSUED AS IT BECOMES AVAILABLE.
3. POINT OF CONTACT: MAJ WILLIAM FAUVER AT COMMERCIAL
(719)550-6379 OR AUTOVON 560-6379.