NOTICE ADVISORY TO NAVSTAR USERS (NANU) #014-91014
SUBJ: PRN9 USABLE IN ALMANACS/UNUSABLE IN EPHEMERIS
1. CONDITION: THE HEALTH STATUS FOR PRN9 (MCS: SVN6) IN ALL GPS
SATELLITE ALMANACS WILL BE SET HEALTHY NOT LATER THAN 15 JAN 91
AT 2359 UTC. ALTHOUGH THE ALMANACS WILL SHOW A USABLE STATUS
PRN9 WILL IN FACT BE UNUSABLE UNTIL THE EPHEMERIS CODE IS ALSO
CHANGED TO USABLE. AT TIMES, USER RANGE ACCURACY OF UP TO 128
METERS MIGHT BE EXPECTED FOR PRN9.
2. RECOMMENDATION: USE PRN9 AT YOUR OWN RISK. FURTHER INFORMATION
WILL BE PROVIDED AS IT BECOMES AVAILABLE.
3. POINT OF CONTACT: MAJ WILLIAM FAUVER AT COMMERCIAL (719)550-
6379 OR AUTOVON 560-6379.